text: /* Modula-3: modified */
  
  /* Subroutines for insn-output.c for SPARC.
     Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
     1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
     2011, 2012
     Free Software Foundation, Inc.
     Contributed by Michael Tiemann (tiemann@cygnus.com)
     64-bit SPARC-V9 support by Michael Tiemann, Jim Wilson, and Doug Evans,
     at Cygnus Support.
  
  This file is part of GCC.
  
  GCC is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3, or (at your option)
  any later version.
  
  GCC is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with GCC; see the file COPYING3.  If not see
  <http://www.gnu.org/licenses/>.  */
  
  #include "config.h"
  #include "system.h"
  #include "coretypes.h"
  #include "tm.h"
  #include "tree.h"
  #include "rtl.h"
  #include "regs.h"
  #include "hard-reg-set.h"
  #include "insn-config.h"
  #include "insn-codes.h"
  #include "conditions.h"
  #include "output.h"
  #include "insn-attr.h"
  #include "flags.h"
  #include "function.h"
  #include "except.h"
  #include "expr.h"
  #include "optabs.h"
  #include "recog.h"
  #include "diagnostic-core.h"
  #include "ggc.h"
  #include "tm_p.h"
  #include "debug.h"
  #include "target.h"
  #include "target-def.h"
  #include "common/common-target.h"
  #include "cfglayout.h"
  #include "gimple.h"
  #include "langhooks.h"
  #include "reload.h"
  #include "params.h"
  #include "df.h"
  #include "dwarf2out.h"
  #include "opts.h"
  
  /* Processor costs */
  
  struct processor_costs {
    /* Integer load */
    const int int_load;
  
    /* Integer signed load */
    const int int_sload;
  
    /* Integer zeroed load */
    const int int_zload;
  
    /* Float load */
    const int float_load;
  
    /* fmov, fneg, fabs */
    const int float_move;
  
    /* fadd, fsub */
    const int float_plusminus;
  
    /* fcmp */
    const int float_cmp;
  
    /* fmov, fmovr */
    const int float_cmove;
  
    /* fmul */
    const int float_mul;
  
    /* fdivs */
    const int float_div_sf;
  
    /* fdivd */
    const int float_div_df;
  
    /* fsqrts */
    const int float_sqrt_sf;
  
    /* fsqrtd */
    const int float_sqrt_df;
  
    /* umul/smul */
    const int int_mul;
  
    /* mulX */
    const int int_mulX;
  
    /* integer multiply cost for each bit set past the most
       significant 3, so the formula for multiply cost becomes:
  
  	if (rs1 < 0)
  	  highest_bit = highest_clear_bit(rs1);
  	else
  	  highest_bit = highest_set_bit(rs1);
  	if (highest_bit < 3)
  	  highest_bit = 3;
  	cost = int_mul{,X} + ((highest_bit - 3) / int_mul_bit_factor);
  
       A value of zero indicates that the multiply costs is fixed,
       and not variable.  */
    const int int_mul_bit_factor;
  
    /* udiv/sdiv */
    const int int_div;
  
    /* divX */
    const int int_divX;
  
    /* movcc, movr */
    const int int_cmove;
  
    /* penalty for shifts, due to scheduling rules etc. */
    const int shift_penalty;
  };
  
  static const
  struct processor_costs cypress_costs = {
    COSTS_N_INSNS (2), /* int load */
    COSTS_N_INSNS (2), /* int signed load */
    COSTS_N_INSNS (2), /* int zeroed load */
    COSTS_N_INSNS (2), /* float load */
    COSTS_N_INSNS (5), /* fmov, fneg, fabs */
    COSTS_N_INSNS (5), /* fadd, fsub */
    COSTS_N_INSNS (1), /* fcmp */
    COSTS_N_INSNS (1), /* fmov, fmovr */
    COSTS_N_INSNS (7), /* fmul */
    COSTS_N_INSNS (37), /* fdivs */
    COSTS_N_INSNS (37), /* fdivd */
    COSTS_N_INSNS (63), /* fsqrts */
    COSTS_N_INSNS (63), /* fsqrtd */
    COSTS_N_INSNS (1), /* imul */
    COSTS_N_INSNS (1), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (1), /* idiv */
    COSTS_N_INSNS (1), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs supersparc_costs = {
    COSTS_N_INSNS (1), /* int load */
    COSTS_N_INSNS (1), /* int signed load */
    COSTS_N_INSNS (1), /* int zeroed load */
    COSTS_N_INSNS (0), /* float load */
    COSTS_N_INSNS (3), /* fmov, fneg, fabs */
    COSTS_N_INSNS (3), /* fadd, fsub */
    COSTS_N_INSNS (3), /* fcmp */
    COSTS_N_INSNS (1), /* fmov, fmovr */
    COSTS_N_INSNS (3), /* fmul */
    COSTS_N_INSNS (6), /* fdivs */
    COSTS_N_INSNS (9), /* fdivd */
    COSTS_N_INSNS (12), /* fsqrts */
    COSTS_N_INSNS (12), /* fsqrtd */
    COSTS_N_INSNS (4), /* imul */
    COSTS_N_INSNS (4), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (4), /* idiv */
    COSTS_N_INSNS (4), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    1, /* shift penalty */
  };
  
  static const
  struct processor_costs hypersparc_costs = {
    COSTS_N_INSNS (1), /* int load */
    COSTS_N_INSNS (1), /* int signed load */
    COSTS_N_INSNS (1), /* int zeroed load */
    COSTS_N_INSNS (1), /* float load */
    COSTS_N_INSNS (1), /* fmov, fneg, fabs */
    COSTS_N_INSNS (1), /* fadd, fsub */
    COSTS_N_INSNS (1), /* fcmp */
    COSTS_N_INSNS (1), /* fmov, fmovr */
    COSTS_N_INSNS (1), /* fmul */
    COSTS_N_INSNS (8), /* fdivs */
    COSTS_N_INSNS (12), /* fdivd */
    COSTS_N_INSNS (17), /* fsqrts */
    COSTS_N_INSNS (17), /* fsqrtd */
    COSTS_N_INSNS (17), /* imul */
    COSTS_N_INSNS (17), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (17), /* idiv */
    COSTS_N_INSNS (17), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs leon_costs = {
    COSTS_N_INSNS (1), /* int load */
    COSTS_N_INSNS (1), /* int signed load */
    COSTS_N_INSNS (1), /* int zeroed load */
    COSTS_N_INSNS (1), /* float load */
    COSTS_N_INSNS (1), /* fmov, fneg, fabs */
    COSTS_N_INSNS (1), /* fadd, fsub */
    COSTS_N_INSNS (1), /* fcmp */
    COSTS_N_INSNS (1), /* fmov, fmovr */
    COSTS_N_INSNS (1), /* fmul */
    COSTS_N_INSNS (15), /* fdivs */
    COSTS_N_INSNS (15), /* fdivd */
    COSTS_N_INSNS (23), /* fsqrts */
    COSTS_N_INSNS (23), /* fsqrtd */
    COSTS_N_INSNS (5), /* imul */
    COSTS_N_INSNS (5), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (5), /* idiv */
    COSTS_N_INSNS (5), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs sparclet_costs = {
    COSTS_N_INSNS (3), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (1), /* int zeroed load */
    COSTS_N_INSNS (1), /* float load */
    COSTS_N_INSNS (1), /* fmov, fneg, fabs */
    COSTS_N_INSNS (1), /* fadd, fsub */
    COSTS_N_INSNS (1), /* fcmp */
    COSTS_N_INSNS (1), /* fmov, fmovr */
    COSTS_N_INSNS (1), /* fmul */
    COSTS_N_INSNS (1), /* fdivs */
    COSTS_N_INSNS (1), /* fdivd */
    COSTS_N_INSNS (1), /* fsqrts */
    COSTS_N_INSNS (1), /* fsqrtd */
    COSTS_N_INSNS (5), /* imul */
    COSTS_N_INSNS (5), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (5), /* idiv */
    COSTS_N_INSNS (5), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs ultrasparc_costs = {
    COSTS_N_INSNS (2), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (2), /* int zeroed load */
    COSTS_N_INSNS (2), /* float load */
    COSTS_N_INSNS (1), /* fmov, fneg, fabs */
    COSTS_N_INSNS (4), /* fadd, fsub */
    COSTS_N_INSNS (1), /* fcmp */
    COSTS_N_INSNS (2), /* fmov, fmovr */
    COSTS_N_INSNS (4), /* fmul */
    COSTS_N_INSNS (13), /* fdivs */
    COSTS_N_INSNS (23), /* fdivd */
    COSTS_N_INSNS (13), /* fsqrts */
    COSTS_N_INSNS (23), /* fsqrtd */
    COSTS_N_INSNS (4), /* imul */
    COSTS_N_INSNS (4), /* imulX */
    2, /* imul bit factor */
    COSTS_N_INSNS (37), /* idiv */
    COSTS_N_INSNS (68), /* idivX */
    COSTS_N_INSNS (2), /* movcc/movr */
    2, /* shift penalty */
  };
  
  static const
  struct processor_costs ultrasparc3_costs = {
    COSTS_N_INSNS (2), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (3), /* int zeroed load */
    COSTS_N_INSNS (2), /* float load */
    COSTS_N_INSNS (3), /* fmov, fneg, fabs */
    COSTS_N_INSNS (4), /* fadd, fsub */
    COSTS_N_INSNS (5), /* fcmp */
    COSTS_N_INSNS (3), /* fmov, fmovr */
    COSTS_N_INSNS (4), /* fmul */
    COSTS_N_INSNS (17), /* fdivs */
    COSTS_N_INSNS (20), /* fdivd */
    COSTS_N_INSNS (20), /* fsqrts */
    COSTS_N_INSNS (29), /* fsqrtd */
    COSTS_N_INSNS (6), /* imul */
    COSTS_N_INSNS (6), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (40), /* idiv */
    COSTS_N_INSNS (71), /* idivX */
    COSTS_N_INSNS (2), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs niagara_costs = {
    COSTS_N_INSNS (3), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (3), /* int zeroed load */
    COSTS_N_INSNS (9), /* float load */
    COSTS_N_INSNS (8), /* fmov, fneg, fabs */
    COSTS_N_INSNS (8), /* fadd, fsub */
    COSTS_N_INSNS (26), /* fcmp */
    COSTS_N_INSNS (8), /* fmov, fmovr */
    COSTS_N_INSNS (29), /* fmul */
    COSTS_N_INSNS (54), /* fdivs */
    COSTS_N_INSNS (83), /* fdivd */
    COSTS_N_INSNS (100), /* fsqrts - not implemented in hardware */
    COSTS_N_INSNS (100), /* fsqrtd - not implemented in hardware */
    COSTS_N_INSNS (11), /* imul */
    COSTS_N_INSNS (11), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (72), /* idiv */
    COSTS_N_INSNS (72), /* idivX */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs niagara2_costs = {
    COSTS_N_INSNS (3), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (3), /* int zeroed load */
    COSTS_N_INSNS (3), /* float load */
    COSTS_N_INSNS (6), /* fmov, fneg, fabs */
    COSTS_N_INSNS (6), /* fadd, fsub */
    COSTS_N_INSNS (6), /* fcmp */
    COSTS_N_INSNS (6), /* fmov, fmovr */
    COSTS_N_INSNS (6), /* fmul */
    COSTS_N_INSNS (19), /* fdivs */
    COSTS_N_INSNS (33), /* fdivd */
    COSTS_N_INSNS (19), /* fsqrts */
    COSTS_N_INSNS (33), /* fsqrtd */
    COSTS_N_INSNS (5), /* imul */
    COSTS_N_INSNS (5), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (26), /* idiv, average of 12 - 41 cycle range */
    COSTS_N_INSNS (26), /* idivX, average of 12 - 41 cycle range */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const
  struct processor_costs niagara3_costs = {
    COSTS_N_INSNS (3), /* int load */
    COSTS_N_INSNS (3), /* int signed load */
    COSTS_N_INSNS (3), /* int zeroed load */
    COSTS_N_INSNS (3), /* float load */
    COSTS_N_INSNS (9), /* fmov, fneg, fabs */
    COSTS_N_INSNS (9), /* fadd, fsub */
    COSTS_N_INSNS (9), /* fcmp */
    COSTS_N_INSNS (9), /* fmov, fmovr */
    COSTS_N_INSNS (9), /* fmul */
    COSTS_N_INSNS (23), /* fdivs */
    COSTS_N_INSNS (37), /* fdivd */
    COSTS_N_INSNS (23), /* fsqrts */
    COSTS_N_INSNS (37), /* fsqrtd */
    COSTS_N_INSNS (9), /* imul */
    COSTS_N_INSNS (9), /* imulX */
    0, /* imul bit factor */
    COSTS_N_INSNS (31), /* idiv, average of 17 - 45 cycle range */
    COSTS_N_INSNS (30), /* idivX, average of 16 - 44 cycle range */
    COSTS_N_INSNS (1), /* movcc/movr */
    0, /* shift penalty */
  };
  
  static const struct processor_costs *sparc_costs = &cypress_costs;
  
  #ifdef HAVE_AS_RELAX_OPTION
  /* If 'as' and 'ld' are relaxing tail call insns into branch always, use
     "or %o7,%g0,X; call Y; or X,%g0,%o7" always, so that it can be optimized.
     With sethi/jmp, neither 'as' nor 'ld' has an easy way how to find out if
     somebody does not branch between the sethi and jmp.  */
  #define LEAF_SIBCALL_SLOT_RESERVED_P 1
  #else
  #define LEAF_SIBCALL_SLOT_RESERVED_P \
    ((TARGET_ARCH64 && !TARGET_CM_MEDLOW) || flag_pic)
  #endif
  
  /* Vector to say how input registers are mapped to output registers.
     HARD_FRAME_POINTER_REGNUM cannot be remapped by this function to
     eliminate it.  You must use -fomit-frame-pointer to get that.  */
  char leaf_reg_remap[] =
  { 0, 1, 2, 3, 4, 5, 6, 7,
    -1, -1, -1, -1, -1, -1, 14, -1,
    -1, -1, -1, -1, -1, -1, -1, -1,
    8, 9, 10, 11, 12, 13, -1, 15,
  
    32, 33, 34, 35, 36, 37, 38, 39,
    40, 41, 42, 43, 44, 45, 46, 47,
    48, 49, 50, 51, 52, 53, 54, 55,
    56, 57, 58, 59, 60, 61, 62, 63,
    64, 65, 66, 67, 68, 69, 70, 71,
    72, 73, 74, 75, 76, 77, 78, 79,
    80, 81, 82, 83, 84, 85, 86, 87,
    88, 89, 90, 91, 92, 93, 94, 95,
    96, 97, 98, 99, 100, 101, 102};
  
  /* Vector, indexed by hard register number, which contains 1
     for a register that is allowable in a candidate for leaf
     function treatment.  */
  char sparc_leaf_regs[] =
  { 1, 1, 1, 1, 1, 1, 1, 1,
    0, 0, 0, 0, 0, 0, 1, 0,
    0, 0, 0, 0, 0, 0, 0, 0,
    1, 1, 1, 1, 1, 1, 0, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1};
  
  struct GTY(()) machine_function
  {
    /* Size of the frame of the function.  */
    HOST_WIDE_INT frame_size;
  
    /* Size of the frame of the function minus the register window save area
       and the outgoing argument area.  */
    HOST_WIDE_INT apparent_frame_size;
  
    /* Register we pretend the frame pointer is allocated to.  Normally, this
       is %fp, but if we are in a leaf procedure, this is (%sp + offset).  We
       record "offset" separately as it may be too big for (reg + disp).  */
    rtx frame_base_reg;
    HOST_WIDE_INT frame_base_offset;
  
    /* Some local-dynamic TLS symbol name.  */
    const char *some_ld_name;
  
    /* Number of global or FP registers to be saved (as 4-byte quantities).  */
    int n_global_fp_regs;
  
    /* True if the current function is leaf and uses only leaf regs,
       so that the SPARC leaf function optimization can be applied.
       Private version of current_function_uses_only_leaf_regs, see
       sparc_expand_prologue for the rationale.  */
    int leaf_function_p;
  
    /* True if the prologue saves local or in registers.  */
    bool save_local_in_regs_p;
  
    /* True if the data calculated by sparc_expand_prologue are valid.  */
    bool prologue_data_valid_p;
  };
  
  #define sparc_frame_size		cfun->machine->frame_size
  #define sparc_apparent_frame_size	cfun->machine->apparent_frame_size
  #define sparc_frame_base_reg		cfun->machine->frame_base_reg
  #define sparc_frame_base_offset		cfun->machine->frame_base_offset
  #define sparc_n_global_fp_regs		cfun->machine->n_global_fp_regs
  #define sparc_leaf_function_p		cfun->machine->leaf_function_p
  #define sparc_save_local_in_regs_p	cfun->machine->save_local_in_regs_p
  #define sparc_prologue_data_valid_p	cfun->machine->prologue_data_valid_p
  
  /* 1 if the next opcode is to be specially indented.  */
  int sparc_indent_opcode = 0;
  
  static void sparc_option_override (void);
  static void sparc_init_modes (void);
  static void scan_record_type (const_tree, int *, int *, int *);
  static int function_arg_slotno (const CUMULATIVE_ARGS *, enum machine_mode,
  				const_tree, bool, bool, int *, int *);
  
  static int supersparc_adjust_cost (rtx, rtx, rtx, int);
  static int hypersparc_adjust_cost (rtx, rtx, rtx, int);
  
  static void sparc_emit_set_const32 (rtx, rtx);
  static void sparc_emit_set_const64 (rtx, rtx);
  static void sparc_output_addr_vec (rtx);
  static void sparc_output_addr_diff_vec (rtx);
  static void sparc_output_deferred_case_vectors (void);
  static bool sparc_legitimate_address_p (enum machine_mode, rtx, bool);
  static bool sparc_legitimate_constant_p (enum machine_mode, rtx);
  static rtx sparc_builtin_saveregs (void);
  static int epilogue_renumber (rtx *, int);
  static bool sparc_assemble_integer (rtx, unsigned int, int);
  static int set_extends (rtx);
  static void sparc_asm_function_prologue (FILE *, HOST_WIDE_INT);
  static void sparc_asm_function_epilogue (FILE *, HOST_WIDE_INT);
  #ifdef TARGET_SOLARIS
  static void sparc_solaris_elf_asm_named_section (const char *, unsigned int,
  						 tree) ATTRIBUTE_UNUSED;
  #endif
  static int sparc_adjust_cost (rtx, rtx, rtx, int);
  static int sparc_issue_rate (void);
  static void sparc_sched_init (FILE *, int, int);
  static int sparc_use_sched_lookahead (void);
  
  static void emit_soft_tfmode_libcall (const char *, int, rtx *);
  static void emit_soft_tfmode_binop (enum rtx_code, rtx *);
  static void emit_soft_tfmode_unop (enum rtx_code, rtx *);
  static void emit_soft_tfmode_cvt (enum rtx_code, rtx *);
  static void emit_hard_tfmode_operation (enum rtx_code, rtx *);
  
  static bool sparc_function_ok_for_sibcall (tree, tree);
  static void sparc_init_libfuncs (void);
  static void sparc_init_builtins (void);
  static void sparc_vis_init_builtins (void);
  static rtx sparc_expand_builtin (tree, rtx, rtx, enum machine_mode, int);
  static tree sparc_fold_builtin (tree, int, tree *, bool);
  static int sparc_vis_mul8x16 (int, int);
  static tree sparc_handle_vis_mul8x16 (int, tree, tree, tree);
  static void sparc_output_mi_thunk (FILE *, tree, HOST_WIDE_INT,
  				   HOST_WIDE_INT, tree);
  static bool sparc_can_output_mi_thunk (const_tree, HOST_WIDE_INT,
  				       HOST_WIDE_INT, const_tree);
  static void sparc_reorg (void);
  static struct machine_function * sparc_init_machine_status (void);
  static bool sparc_cannot_force_const_mem (enum machine_mode, rtx);
  static rtx sparc_tls_get_addr (void);
  static rtx sparc_tls_got (void);
  static const char *get_some_local_dynamic_name (void);
  static int get_some_local_dynamic_name_1 (rtx *, void *);
  static int sparc_register_move_cost (enum machine_mode,
  				     reg_class_t, reg_class_t);
  static bool sparc_rtx_costs (rtx, int, int, int, int *, bool);
  static rtx sparc_function_value (const_tree, const_tree, bool);
  static rtx sparc_libcall_value (enum machine_mode, const_rtx);
  static bool sparc_function_value_regno_p (const unsigned int);
  static rtx sparc_struct_value_rtx (tree, int);
  static enum machine_mode sparc_promote_function_mode (const_tree, enum machine_mode,
  						      int *, const_tree, int);
  static bool sparc_return_in_memory (const_tree, const_tree);
  static bool sparc_strict_argument_naming (cumulative_args_t);
  static void sparc_va_start (tree, rtx);
  static tree sparc_gimplify_va_arg (tree, tree, gimple_seq *, gimple_seq *);
  static bool sparc_vector_mode_supported_p (enum machine_mode);
  static bool sparc_tls_referenced_p (rtx);
  static rtx sparc_legitimize_tls_address (rtx);
  static rtx sparc_legitimize_pic_address (rtx, rtx);
  static rtx sparc_legitimize_address (rtx, rtx, enum machine_mode);
  static rtx sparc_delegitimize_address (rtx);
  static bool sparc_mode_dependent_address_p (const_rtx);
  static bool sparc_pass_by_reference (cumulative_args_t,
  				     enum machine_mode, const_tree, bool);
  static void sparc_function_arg_advance (cumulative_args_t,
  					enum machine_mode, const_tree, bool);
  static rtx sparc_function_arg_1 (cumulative_args_t,
  				 enum machine_mode, const_tree, bool, bool);
  static rtx sparc_function_arg (cumulative_args_t,
  			       enum machine_mode, const_tree, bool);
  static rtx sparc_function_incoming_arg (cumulative_args_t,
  					enum machine_mode, const_tree, bool);
  static unsigned int sparc_function_arg_boundary (enum machine_mode,
  						 const_tree);
  static int sparc_arg_partial_bytes (cumulative_args_t,
  				    enum machine_mode, tree, bool);
  static void sparc_output_dwarf_dtprel (FILE *, int, rtx) ATTRIBUTE_UNUSED;
  static void sparc_file_end (void);
  static bool sparc_frame_pointer_required (void);
  static bool sparc_can_eliminate (const int, const int);
  static rtx sparc_builtin_setjmp_frame_value (void);
  static void sparc_conditional_register_usage (void);
  #ifdef TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
  static const char *sparc_mangle_type (const_tree);
  #endif
  static void sparc_trampoline_init (rtx, tree, rtx);
  static enum machine_mode sparc_preferred_simd_mode (enum machine_mode);
  static reg_class_t sparc_preferred_reload_class (rtx x, reg_class_t rclass);
  static bool sparc_print_operand_punct_valid_p (unsigned char);
  static void sparc_print_operand (FILE *, rtx, int);
  static void sparc_print_operand_address (FILE *, rtx);
  static reg_class_t sparc_secondary_reload (bool, rtx, reg_class_t,
  					   enum machine_mode,
  					   secondary_reload_info *);
  
  #ifdef SUBTARGET_ATTRIBUTE_TABLE
  /* Table of valid machine attributes.  */
  static const struct attribute_spec sparc_attribute_table[] =
  {
    /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,
         do_diagnostic } */
    SUBTARGET_ATTRIBUTE_TABLE,
    { NULL,        0, 0, false, false, false, NULL, false }
  };
  #endif
  
  /* Option handling.  */
  
  /* Parsed value.  */
  enum cmodel sparc_cmodel;
  
  char sparc_hard_reg_printed[8];
  
  /* Initialize the GCC target structure.  */
  
  /* The default is to use .half rather than .short for aligned HI objects.  */
  #undef TARGET_ASM_ALIGNED_HI_OP
  #define TARGET_ASM_ALIGNED_HI_OP "\t.half\t"
  
  #undef TARGET_ASM_UNALIGNED_HI_OP
  #define TARGET_ASM_UNALIGNED_HI_OP "\t.uahalf\t"
  #undef TARGET_ASM_UNALIGNED_SI_OP
  #define TARGET_ASM_UNALIGNED_SI_OP "\t.uaword\t"
  #undef TARGET_ASM_UNALIGNED_DI_OP
  #define TARGET_ASM_UNALIGNED_DI_OP "\t.uaxword\t"
  
  /* The target hook has to handle DI-mode values.  */
  #undef TARGET_ASM_INTEGER
  #define TARGET_ASM_INTEGER sparc_assemble_integer
  
  #undef TARGET_ASM_FUNCTION_PROLOGUE
  #define TARGET_ASM_FUNCTION_PROLOGUE sparc_asm_function_prologue
  #undef TARGET_ASM_FUNCTION_EPILOGUE
  #define TARGET_ASM_FUNCTION_EPILOGUE sparc_asm_function_epilogue
  
  #undef TARGET_SCHED_ADJUST_COST
  #define TARGET_SCHED_ADJUST_COST sparc_adjust_cost
  #undef TARGET_SCHED_ISSUE_RATE
  #define TARGET_SCHED_ISSUE_RATE sparc_issue_rate
  #undef TARGET_SCHED_INIT
  #define TARGET_SCHED_INIT sparc_sched_init
  #undef TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD
  #define TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD sparc_use_sched_lookahead
  
  #undef TARGET_FUNCTION_OK_FOR_SIBCALL
  #define TARGET_FUNCTION_OK_FOR_SIBCALL sparc_function_ok_for_sibcall
  
  #undef TARGET_INIT_LIBFUNCS
  #define TARGET_INIT_LIBFUNCS sparc_init_libfuncs
  #undef TARGET_INIT_BUILTINS
  #define TARGET_INIT_BUILTINS sparc_init_builtins
  
  #undef TARGET_LEGITIMIZE_ADDRESS
  #define TARGET_LEGITIMIZE_ADDRESS sparc_legitimize_address
  #undef TARGET_DELEGITIMIZE_ADDRESS
  #define TARGET_DELEGITIMIZE_ADDRESS sparc_delegitimize_address
  #undef TARGET_MODE_DEPENDENT_ADDRESS_P
  #define TARGET_MODE_DEPENDENT_ADDRESS_P sparc_mode_dependent_address_p
  
  #undef TARGET_EXPAND_BUILTIN
  #define TARGET_EXPAND_BUILTIN sparc_expand_builtin
  #undef TARGET_FOLD_BUILTIN
  #define TARGET_FOLD_BUILTIN sparc_fold_builtin
  
  #if TARGET_TLS
  #undef TARGET_HAVE_TLS
  #define TARGET_HAVE_TLS true
  #endif
  
  #undef TARGET_CANNOT_FORCE_CONST_MEM
  #define TARGET_CANNOT_FORCE_CONST_MEM sparc_cannot_force_const_mem
  
  #undef TARGET_ASM_OUTPUT_MI_THUNK
  #define TARGET_ASM_OUTPUT_MI_THUNK sparc_output_mi_thunk
  #undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
  #define TARGET_ASM_CAN_OUTPUT_MI_THUNK sparc_can_output_mi_thunk
  
  #undef TARGET_MACHINE_DEPENDENT_REORG
  #define TARGET_MACHINE_DEPENDENT_REORG sparc_reorg
  
  #undef TARGET_RTX_COSTS
  #define TARGET_RTX_COSTS sparc_rtx_costs
  #undef TARGET_ADDRESS_COST
  #define TARGET_ADDRESS_COST hook_int_rtx_bool_0
  #undef TARGET_REGISTER_MOVE_COST
  #define TARGET_REGISTER_MOVE_COST sparc_register_move_cost
  
  #undef TARGET_PROMOTE_FUNCTION_MODE
  #define TARGET_PROMOTE_FUNCTION_MODE sparc_promote_function_mode
  
  #undef TARGET_FUNCTION_VALUE
  #define TARGET_FUNCTION_VALUE sparc_function_value
  #undef TARGET_LIBCALL_VALUE
  #define TARGET_LIBCALL_VALUE sparc_libcall_value
  #undef TARGET_FUNCTION_VALUE_REGNO_P
  #define TARGET_FUNCTION_VALUE_REGNO_P sparc_function_value_regno_p
  
  #undef TARGET_STRUCT_VALUE_RTX
  #define TARGET_STRUCT_VALUE_RTX sparc_struct_value_rtx
  #undef TARGET_RETURN_IN_MEMORY
  #define TARGET_RETURN_IN_MEMORY sparc_return_in_memory
  #undef TARGET_MUST_PASS_IN_STACK
  #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
  #undef TARGET_PASS_BY_REFERENCE
  #define TARGET_PASS_BY_REFERENCE sparc_pass_by_reference
  #undef TARGET_ARG_PARTIAL_BYTES
  #define TARGET_ARG_PARTIAL_BYTES sparc_arg_partial_bytes
  #undef TARGET_FUNCTION_ARG_ADVANCE
  #define TARGET_FUNCTION_ARG_ADVANCE sparc_function_arg_advance
  #undef TARGET_FUNCTION_ARG
  #define TARGET_FUNCTION_ARG sparc_function_arg
  #undef TARGET_FUNCTION_INCOMING_ARG
  #define TARGET_FUNCTION_INCOMING_ARG sparc_function_incoming_arg
  #undef TARGET_FUNCTION_ARG_BOUNDARY
  #define TARGET_FUNCTION_ARG_BOUNDARY sparc_function_arg_boundary
  
  #undef TARGET_EXPAND_BUILTIN_SAVEREGS
  #define TARGET_EXPAND_BUILTIN_SAVEREGS sparc_builtin_saveregs
  #undef TARGET_STRICT_ARGUMENT_NAMING
  #define TARGET_STRICT_ARGUMENT_NAMING sparc_strict_argument_naming
  
  #undef TARGET_EXPAND_BUILTIN_VA_START
  #define TARGET_EXPAND_BUILTIN_VA_START sparc_va_start
  #undef TARGET_GIMPLIFY_VA_ARG_EXPR
  #define TARGET_GIMPLIFY_VA_ARG_EXPR sparc_gimplify_va_arg
  
  #undef TARGET_VECTOR_MODE_SUPPORTED_P
  #define TARGET_VECTOR_MODE_SUPPORTED_P sparc_vector_mode_supported_p
  
  #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE
  #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE sparc_preferred_simd_mode
  
  #ifdef SUBTARGET_INSERT_ATTRIBUTES
  #undef TARGET_INSERT_ATTRIBUTES
  #define TARGET_INSERT_ATTRIBUTES SUBTARGET_INSERT_ATTRIBUTES
  #endif
  
  #ifdef SUBTARGET_ATTRIBUTE_TABLE
  #undef TARGET_ATTRIBUTE_TABLE
  #define TARGET_ATTRIBUTE_TABLE sparc_attribute_table
  #endif
  
  #undef TARGET_RELAXED_ORDERING
  #define TARGET_RELAXED_ORDERING SPARC_RELAXED_ORDERING
  
  #undef TARGET_OPTION_OVERRIDE
  #define TARGET_OPTION_OVERRIDE sparc_option_override
  
  #if TARGET_GNU_TLS && defined(HAVE_AS_SPARC_UA_PCREL)
  #undef TARGET_ASM_OUTPUT_DWARF_DTPREL
  #define TARGET_ASM_OUTPUT_DWARF_DTPREL sparc_output_dwarf_dtprel
  #endif
  
  #undef TARGET_ASM_FILE_END
  #define TARGET_ASM_FILE_END sparc_file_end
  
  #undef TARGET_FRAME_POINTER_REQUIRED
  #define TARGET_FRAME_POINTER_REQUIRED sparc_frame_pointer_required
  
  #undef TARGET_BUILTIN_SETJMP_FRAME_VALUE
  #define TARGET_BUILTIN_SETJMP_FRAME_VALUE sparc_builtin_setjmp_frame_value
  
  #undef TARGET_CAN_ELIMINATE
  #define TARGET_CAN_ELIMINATE sparc_can_eliminate
  
  #undef  TARGET_PREFERRED_RELOAD_CLASS
  #define TARGET_PREFERRED_RELOAD_CLASS sparc_preferred_reload_class
  
  #undef TARGET_SECONDARY_RELOAD
  #define TARGET_SECONDARY_RELOAD sparc_secondary_reload
  
  #undef TARGET_CONDITIONAL_REGISTER_USAGE
  #define TARGET_CONDITIONAL_REGISTER_USAGE sparc_conditional_register_usage
  
  #ifdef TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
  #undef TARGET_MANGLE_TYPE
  #define TARGET_MANGLE_TYPE sparc_mangle_type
  #endif
  
  #undef TARGET_LEGITIMATE_ADDRESS_P
  #define TARGET_LEGITIMATE_ADDRESS_P sparc_legitimate_address_p
  
  #undef TARGET_LEGITIMATE_CONSTANT_P
  #define TARGET_LEGITIMATE_CONSTANT_P sparc_legitimate_constant_p
  
  #undef TARGET_TRAMPOLINE_INIT
  #define TARGET_TRAMPOLINE_INIT sparc_trampoline_init
  
  #undef TARGET_PRINT_OPERAND_PUNCT_VALID_P
  #define TARGET_PRINT_OPERAND_PUNCT_VALID_P sparc_print_operand_punct_valid_p
  #undef TARGET_PRINT_OPERAND
  #define TARGET_PRINT_OPERAND sparc_print_operand
  #undef TARGET_PRINT_OPERAND_ADDRESS
  #define TARGET_PRINT_OPERAND_ADDRESS sparc_print_operand_address
  
  /* The value stored by LDSTUB.  */
  #undef TARGET_ATOMIC_TEST_AND_SET_TRUEVAL
  #define TARGET_ATOMIC_TEST_AND_SET_TRUEVAL 0xff
  
  struct gcc_target targetm = TARGET_INITIALIZER;
  
  static void
  dump_target_flag_bits (const int flags)
  {
    if (flags & MASK_64BIT)
      fprintf (stderr, "64BIT ");
    if (flags & MASK_APP_REGS)
      fprintf (stderr, "APP_REGS ");
    if (flags & MASK_FASTER_STRUCTS)
      fprintf (stderr, "FASTER_STRUCTS ");
    if (flags & MASK_FLAT)
      fprintf (stderr, "FLAT ");
    if (flags & MASK_FMAF)
      fprintf (stderr, "FMAF ");
    if (flags & MASK_FPU)
      fprintf (stderr, "FPU ");
    if (flags & MASK_HARD_QUAD)
      fprintf (stderr, "HARD_QUAD ");
    if (flags & MASK_POPC)
      fprintf (stderr, "POPC ");
    if (flags & MASK_PTR64)
      fprintf (stderr, "PTR64 ");
    if (flags & MASK_STACK_BIAS)
      fprintf (stderr, "STACK_BIAS ");
    if (flags & MASK_UNALIGNED_DOUBLES)
      fprintf (stderr, "UNALIGNED_DOUBLES ");
    if (flags & MASK_V8PLUS)
      fprintf (stderr, "V8PLUS ");
    if (flags & MASK_VIS)
      fprintf (stderr, "VIS ");
    if (flags & MASK_VIS2)
      fprintf (stderr, "VIS2 ");
    if (flags & MASK_VIS3)
      fprintf (stderr, "VIS3 ");
    if (flags & MASK_DEPRECATED_V8_INSNS)
      fprintf (stderr, "DEPRECATED_V8_INSNS ");
    if (flags & MASK_SPARCLET)
      fprintf (stderr, "SPARCLET ");
    if (flags & MASK_SPARCLITE)
      fprintf (stderr, "SPARCLITE ");
    if (flags & MASK_V8)
      fprintf (stderr, "V8 ");
    if (flags & MASK_V9)
      fprintf (stderr, "V9 ");
  }
  
  static void
  dump_target_flags (const char *prefix, const int flags)
  {
    fprintf (stderr, "%s: (%08x) [ ", prefix, flags);
    dump_target_flag_bits (flags);
    fprintf(stderr, "]\n");
  }
  
  /* Validate and override various options, and do some machine dependent
     initialization.  */
  
  static void
  sparc_option_override (void)
  {
    static struct code_model {
      const char *const name;
      const enum cmodel value;
    } const cmodels[] = {
      { "32", CM_32 },
      { "medlow", CM_MEDLOW },
      { "medmid", CM_MEDMID },
      { "medany", CM_MEDANY },
      { "embmedany", CM_EMBMEDANY },
      { NULL, (enum cmodel) 0 }
    };
    const struct code_model *cmodel;
    /* Map TARGET_CPU_DEFAULT to value for -m{cpu,tune}=.  */
    static struct cpu_default {
      const int cpu;
      const enum processor_type processor;
    } const cpu_default[] = {
      /* There must be one entry here for each TARGET_CPU value.  */
      { TARGET_CPU_sparc, PROCESSOR_CYPRESS },
      { TARGET_CPU_v8, PROCESSOR_V8 },
      { TARGET_CPU_supersparc, PROCESSOR_SUPERSPARC },
      { TARGET_CPU_hypersparc, PROCESSOR_HYPERSPARC },
      { TARGET_CPU_leon, PROCESSOR_LEON },
      { TARGET_CPU_sparclite, PROCESSOR_F930 },
      { TARGET_CPU_sparclite86x, PROCESSOR_SPARCLITE86X },
      { TARGET_CPU_sparclet, PROCESSOR_TSC701 },
      { TARGET_CPU_v9, PROCESSOR_V9 },
      { TARGET_CPU_ultrasparc, PROCESSOR_ULTRASPARC },
      { TARGET_CPU_ultrasparc3, PROCESSOR_ULTRASPARC3 },
      { TARGET_CPU_niagara, PROCESSOR_NIAGARA },
      { TARGET_CPU_niagara2, PROCESSOR_NIAGARA2 },
      { TARGET_CPU_niagara3, PROCESSOR_NIAGARA3 },
      { TARGET_CPU_niagara4, PROCESSOR_NIAGARA4 },
      { -1, PROCESSOR_V7 }
    };
    const struct cpu_default *def;
    /* Table of values for -m{cpu,tune}=.  This must match the order of
       the PROCESSOR_* enumeration.  */
    static struct cpu_table {
      const char *const name;
      const int disable;
      const int enable;
    } const cpu_table[] = {
      { "v7",		MASK_ISA, 0 },
      { "cypress",	MASK_ISA, 0 },
      { "v8",		MASK_ISA, MASK_V8 },
      /* TI TMS390Z55 supersparc */
      { "supersparc",	MASK_ISA, MASK_V8 },
      { "hypersparc",	MASK_ISA, MASK_V8|MASK_FPU },
      /* LEON */
      { "leon",		MASK_ISA, MASK_V8|MASK_FPU },
      { "sparclite",	MASK_ISA, MASK_SPARCLITE },
      /* The Fujitsu MB86930 is the original sparclite chip, with no FPU.  */
      { "f930",		MASK_ISA|MASK_FPU, MASK_SPARCLITE },
      /* The Fujitsu MB86934 is the recent sparclite chip, with an FPU.  */
      { "f934",		MASK_ISA, MASK_SPARCLITE|MASK_FPU },
      { "sparclite86x",	MASK_ISA|MASK_FPU, MASK_SPARCLITE },
      { "sparclet",	MASK_ISA, MASK_SPARCLET },
      /* TEMIC sparclet */
      { "tsc701",		MASK_ISA, MASK_SPARCLET },
      { "v9",		MASK_ISA, MASK_V9 },
      /* UltraSPARC I, II, IIi */
      { "ultrasparc",	MASK_ISA,
      /* Although insns using %y are deprecated, it is a clear win.  */
        MASK_V9|MASK_DEPRECATED_V8_INSNS },
      /* UltraSPARC III */
      /* ??? Check if %y issue still holds true.  */
      { "ultrasparc3",	MASK_ISA,
        MASK_V9|MASK_DEPRECATED_V8_INSNS|MASK_VIS2 },
      /* UltraSPARC T1 */
      { "niagara",	MASK_ISA,
        MASK_V9|MASK_DEPRECATED_V8_INSNS },
      /* UltraSPARC T2 */
      { "niagara2",	MASK_ISA,
        MASK_V9|MASK_POPC|MASK_VIS2 },
      /* UltraSPARC T3 */
      { "niagara3",	MASK_ISA,
        MASK_V9|MASK_POPC|MASK_VIS2|MASK_VIS3|MASK_FMAF },
      /* UltraSPARC T4 */
      { "niagara4",	MASK_ISA,
        MASK_V9|MASK_POPC|MASK_VIS2|MASK_VIS3|MASK_FMAF },
    };
    const struct cpu_table *cpu;
    unsigned int i;
    int fpu;
  
    if (sparc_debug_string != NULL)
      {
        const char *q;
        char *p;
  
        p = ASTRDUP (sparc_debug_string);
        while ((q = strtok (p, ",")) != NULL)
  	{
  	  bool invert = { 0 };
  	  int mask = { 0 };
  
  	  p = NULL;
  	  if (*q == '!')
  	    {
  	      invert = true;
  	      q++;
  	    }
  	  else
  	    invert = false;
  
  	  if (! strcmp (q, "all"))
  	    mask = MASK_DEBUG_ALL;
  	  else if (! strcmp (q, "options"))
  	    mask = MASK_DEBUG_OPTIONS;
  	  else
  	    error ("unknown -mdebug-%s switch", q);
  
  	  if (invert)
  	    sparc_debug &= ~mask;
  	  else
  	    sparc_debug |= mask;
  	}
      }
  
    if (TARGET_DEBUG_OPTIONS)
      {
        dump_target_flags("Initial target_flags", target_flags);
        dump_target_flags("target_flags_explicit", target_flags_explicit);
      }
  
  #ifdef SUBTARGET_OVERRIDE_OPTIONS
    SUBTARGET_OVERRIDE_OPTIONS;
  #endif
  
  #ifndef SPARC_BI_ARCH
    /* Check for unsupported architecture size.  */
    if (! TARGET_64BIT != DEFAULT_ARCH32_P)
      error ("%s is not supported by this configuration",
  	   DEFAULT_ARCH32_P ? "-m64" : "-m32");
  #endif
  
    /* We force all 64bit archs to use 128 bit long double */
    if (TARGET_64BIT && ! TARGET_LONG_DOUBLE_128)
      {
        error ("-mlong-double-64 not allowed with -m64");
        target_flags |= MASK_LONG_DOUBLE_128;
      }
  
    /* Code model selection.  */
    sparc_cmodel = SPARC_DEFAULT_CMODEL;
  
  #ifdef SPARC_BI_ARCH
    if (TARGET_ARCH32)
      sparc_cmodel = CM_32;
  #endif
  
    if (sparc_cmodel_string != NULL)
      {
        if (TARGET_ARCH64)
  	{
  	  for (cmodel = &cmodels[0]; cmodel->name; cmodel++)
  	    if (strcmp (sparc_cmodel_string, cmodel->name) == 0)
  	      break;
  	  if (cmodel->name == NULL)
  	    error ("bad value (%s) for -mcmodel= switch", sparc_cmodel_string);
  	  else
  	    sparc_cmodel = cmodel->value;
  	}
        else
  	error ("-mcmodel= is not supported on 32 bit systems");
      }
  
    /* Check that -fcall-saved-REG wasn't specified for out registers.  */
    for (i = 8; i < 16; i++)
      if (!call_used_regs [i])
        {
  	error ("-fcall-saved-REG is not supported for out registers");
          call_used_regs [i] = 1;
        }
  
    fpu = target_flags & MASK_FPU; /* save current -mfpu status */
  
    /* Set the default CPU.  */
    if (!global_options_set.x_sparc_cpu_and_features)
      {
        for (def = &cpu_default[0]; def->cpu != -1; ++def)
  	if (def->cpu == TARGET_CPU_DEFAULT)
  	  break;
        gcc_assert (def->cpu != -1);
        sparc_cpu_and_features = def->processor;
      }
  
    if (!global_options_set.x_sparc_cpu)
      sparc_cpu = sparc_cpu_and_features;
  
    cpu = &cpu_table[(int) sparc_cpu_and_features];
  
    if (TARGET_DEBUG_OPTIONS)
      {
        fprintf (stderr, "sparc_cpu_and_features: %s\n", cpu->name);
        fprintf (stderr, "sparc_cpu: %s\n",
  	       cpu_table[(int) sparc_cpu].name);
        dump_target_flags ("cpu->disable", cpu->disable);
        dump_target_flags ("cpu->enable", cpu->enable);
      }
  
    target_flags &= ~cpu->disable;
    target_flags |= (cpu->enable
  #ifndef HAVE_AS_FMAF_HPC_VIS3
  		   & ~(MASK_FMAF | MASK_VIS3)
  #endif
  		   );
  
    /* If -mfpu or -mno-fpu was explicitly used, don't override with
       the processor default.  */
    if (target_flags_explicit & MASK_FPU)
      target_flags = (target_flags & ~MASK_FPU) | fpu;
  
    /* -mvis2 implies -mvis */
    if (TARGET_VIS2)
      target_flags |= MASK_VIS;
  
    /* -mvis3 implies -mvis2 and -mvis */
    if (TARGET_VIS3)
      target_flags |= MASK_VIS2 | MASK_VIS;
  
    /* Don't allow -mvis, -mvis2, -mvis3, or -mfmaf if FPU is disabled.  */
    if (! TARGET_FPU)
      target_flags &= ~(MASK_VIS | MASK_VIS2 | MASK_VIS3 | MASK_FMAF);
  
    /* -mvis assumes UltraSPARC+, so we are sure v9 instructions
       are available.
       -m64 also implies v9.  */
    if (TARGET_VIS || TARGET_ARCH64)
      {
        target_flags |= MASK_V9;
        target_flags &= ~(MASK_V8 | MASK_SPARCLET | MASK_SPARCLITE);
      }
  
    /* -mvis also implies -mv8plus on 32-bit */
    if (TARGET_VIS && ! TARGET_ARCH64)
      target_flags |= MASK_V8PLUS;
  
    /* Use the deprecated v8 insns for sparc64 in 32 bit mode.  */
    if (TARGET_V9 && TARGET_ARCH32)
      target_flags |= MASK_DEPRECATED_V8_INSNS;
  
    /* V8PLUS requires V9, makes no sense in 64 bit mode.  */
    if (! TARGET_V9 || TARGET_ARCH64)
      target_flags &= ~MASK_V8PLUS;
  
    /* Don't use stack biasing in 32 bit mode.  */
    if (TARGET_ARCH32)
      target_flags &= ~MASK_STACK_BIAS;
  
    /* Supply a default value for align_functions.  */
    if (align_functions == 0
        && (sparc_cpu == PROCESSOR_ULTRASPARC
  	  || sparc_cpu == PROCESSOR_ULTRASPARC3
  	  || sparc_cpu == PROCESSOR_NIAGARA
  	  || sparc_cpu == PROCESSOR_NIAGARA2
  	  || sparc_cpu == PROCESSOR_NIAGARA3
  	  || sparc_cpu == PROCESSOR_NIAGARA4))
      align_functions = 32;
  
    /* Validate PCC_STRUCT_RETURN.  */
    if (flag_pcc_struct_return == DEFAULT_PCC_STRUCT_RETURN)
      flag_pcc_struct_return = (TARGET_ARCH64 ? 0 : 1);
  
    /* Only use .uaxword when compiling for a 64-bit target.  */
    if (!TARGET_ARCH64)
      targetm.asm_out.unaligned_op.di = NULL;
  
    /* Do various machine dependent initializations.  */
    sparc_init_modes ();
  
    /* Set up function hooks.  */
    init_machine_status = sparc_init_machine_status;
  
    switch (sparc_cpu)
      {
      case PROCESSOR_V7:
      case PROCESSOR_CYPRESS:
        sparc_costs = &cypress_costs;
        break;
      case PROCESSOR_V8:
      case PROCESSOR_SPARCLITE:
      case PROCESSOR_SUPERSPARC:
        sparc_costs = &supersparc_costs;
        break;
      case PROCESSOR_F930:
      case PROCESSOR_F934:
      case PROCESSOR_HYPERSPARC:
      case PROCESSOR_SPARCLITE86X:
        sparc_costs = &hypersparc_costs;
        break;
      case PROCESSOR_LEON:
        sparc_costs = &leon_costs;
        break;
      case PROCESSOR_SPARCLET:
      case PROCESSOR_TSC701:
        sparc_costs = &sparclet_costs;
        break;
      case PROCESSOR_V9:
      case PROCESSOR_ULTRASPARC:
        sparc_costs = &ultrasparc_costs;
        break;
      case PROCESSOR_ULTRASPARC3:
        sparc_costs = &ultrasparc3_costs;
        break;
      case PROCESSOR_NIAGARA:
        sparc_costs = &niagara_costs;
        break;
      case PROCESSOR_NIAGARA2:
        sparc_costs = &niagara2_costs;
        break;
      case PROCESSOR_NIAGARA3:
      case PROCESSOR_NIAGARA4:
        sparc_costs = &niagara3_costs;
        break;
      case PROCESSOR_NATIVE:
        gcc_unreachable ();
      };
  
    if (sparc_memory_model == SMM_DEFAULT)
      {
        /* Choose the memory model for the operating system.  */
        enum sparc_memory_model_type os_default = SUBTARGET_DEFAULT_MEMORY_MODEL;
        if (os_default != SMM_DEFAULT)
  	sparc_memory_model = os_default;
        /* Choose the most relaxed model for the processor.  */
        else if (TARGET_V9)
  	sparc_memory_model = SMM_RMO;
        else if (TARGET_V8)
  	sparc_memory_model = SMM_PSO;
        else
  	sparc_memory_model = SMM_SC;
      }
  
  #ifdef TARGET_DEFAULT_LONG_DOUBLE_128
    if (!(target_flags_explicit & MASK_LONG_DOUBLE_128))
      target_flags |= MASK_LONG_DOUBLE_128;
  #endif
  
    if (TARGET_DEBUG_OPTIONS)
      dump_target_flags ("Final target_flags", target_flags);
  
    maybe_set_param_value (PARAM_SIMULTANEOUS_PREFETCHES,
  			 ((sparc_cpu == PROCESSOR_ULTRASPARC
  			   || sparc_cpu == PROCESSOR_NIAGARA
  			   || sparc_cpu == PROCESSOR_NIAGARA2
  			   || sparc_cpu == PROCESSOR_NIAGARA3
  			   || sparc_cpu == PROCESSOR_NIAGARA4)
  			  ? 2
  			  : (sparc_cpu == PROCESSOR_ULTRASPARC3
  			     ? 8 : 3)),
  			 global_options.x_param_values,
  			 global_options_set.x_param_values);
    maybe_set_param_value (PARAM_L1_CACHE_LINE_SIZE,
  			 ((sparc_cpu == PROCESSOR_ULTRASPARC
  			   || sparc_cpu == PROCESSOR_ULTRASPARC3
  			   || sparc_cpu == PROCESSOR_NIAGARA
  			   || sparc_cpu == PROCESSOR_NIAGARA2
  			   || sparc_cpu == PROCESSOR_NIAGARA3
  			   || sparc_cpu == PROCESSOR_NIAGARA4)
  			  ? 64 : 32),
  			 global_options.x_param_values,
  			 global_options_set.x_param_values);
  
    /* Disable save slot sharing for call-clobbered registers by default.
       The IRA sharing algorithm works on single registers only and this
       pessimizes for double floating-point registers.  */
    if (!global_options_set.x_flag_ira_share_save_slots)
      flag_ira_share_save_slots = 0;
  }
  
  /* Miscellaneous utilities.  */
  
  /* Nonzero if CODE, a comparison, is suitable for use in v9 conditional move
     or branch on register contents instructions.  */
  
  int
  v9_regcmp_p (enum rtx_code code)
  {
    return (code == EQ || code == NE || code == GE || code == LT
  	  || code == LE || code == GT);
  }
  
  /* Nonzero if OP is a floating point constant which can
     be loaded into an integer register using a single
     sethi instruction.  */
  
  int
  fp_sethi_p (rtx op)
  {
    if (GET_CODE (op) == CONST_DOUBLE)
      {
        REAL_VALUE_TYPE r;
        long i;
  
        REAL_VALUE_FROM_CONST_DOUBLE (r, op);
        REAL_VALUE_TO_TARGET_SINGLE (r, i);
        return !SPARC_SIMM13_P (i) && SPARC_SETHI_P (i);
      }
  
    return 0;
  }
  
  /* Nonzero if OP is a floating point constant which can
     be loaded into an integer register using a single
     mov instruction.  */
  
  int
  fp_mov_p (rtx op)
  {
    if (GET_CODE (op) == CONST_DOUBLE)
      {
        REAL_VALUE_TYPE r;
        long i;
  
        REAL_VALUE_FROM_CONST_DOUBLE (r, op);
        REAL_VALUE_TO_TARGET_SINGLE (r, i);
        return SPARC_SIMM13_P (i);
      }
  
    return 0;
  }
  
  /* Nonzero if OP is a floating point constant which can
     be loaded into an integer register using a high/losum
     instruction sequence.  */
  
  int
  fp_high_losum_p (rtx op)
  {
    /* The constraints calling this should only be in
       SFmode move insns, so any constant which cannot
       be moved using a single insn will do.  */
    if (GET_CODE (op) == CONST_DOUBLE)
      {
        REAL_VALUE_TYPE r;
        long i;
  
        REAL_VALUE_FROM_CONST_DOUBLE (r, op);
        REAL_VALUE_TO_TARGET_SINGLE (r, i);
        return !SPARC_SIMM13_P (i) && !SPARC_SETHI_P (i);
      }
  
    return 0;
  }
  
  /* Return true if the address of LABEL can be loaded by means of the
     mov{si,di}_pic_label_ref patterns in PIC mode.  */
  
  static bool
  can_use_mov_pic_label_ref (rtx label)
  {
    /* VxWorks does not impose a fixed gap between segments; the run-time
       gap can be different from the object-file gap.  We therefore can't
       assume X - _GLOBAL_OFFSET_TABLE_ is a link-time constant unless we
       are absolutely sure that X is in the same segment as the GOT.
       Unfortunately, the flexibility of linker scripts means that we
       can't be sure of that in general, so assume that GOT-relative
       accesses are never valid on VxWorks.  */
    if (TARGET_VXWORKS_RTP)
      return false;
  
    /* Similarly, if the label is non-local, it might end up being placed
       in a different section than the current one; now mov_pic_label_ref
       requires the label and the code to be in the same section.  */
    if (LABEL_REF_NONLOCAL_P (label))
      return false;
  
    /* Finally, if we are reordering basic blocks and partition into hot
       and cold sections, this might happen for any label.  */
    if (flag_reorder_blocks_and_partition)
      return false;
  
    return true;
  }
  
  /* Expand a move instruction.  Return true if all work is done.  */
  
  bool
  sparc_expand_move (enum machine_mode mode, rtx *operands)
  {
    /* Handle sets of MEM first.  */
    if (GET_CODE (operands[0]) == MEM)
      {
        /* 0 is a register (or a pair of registers) on SPARC.  */
        if (register_or_zero_operand (operands[1], mode))
  	return false;
  
        if (!reload_in_progress)
  	{
  	  operands[0] = validize_mem (operands[0]);
  	  operands[1] = force_reg (mode, operands[1]);
  	}
      }
  
    /* Fixup TLS cases.  */
    if (TARGET_HAVE_TLS
        && CONSTANT_P (operands[1])
        && sparc_tls_referenced_p (operands [1]))
      {
        operands[1] = sparc_legitimize_tls_address (operands[1]);
        return false;
      }
  
    /* Fixup PIC cases.  */
    if (flag_pic && CONSTANT_P (operands[1]))
      {
        if (pic_address_needs_scratch (operands[1]))
  	operands[1] = sparc_legitimize_pic_address (operands[1], NULL_RTX);
  
        /* We cannot use the mov{si,di}_pic_label_ref patterns in all cases.  */
        if (GET_CODE (operands[1]) == LABEL_REF
  	  && can_use_mov_pic_label_ref (operands[1]))
  	{
  	  if (mode == SImode)
  	    {
  	      emit_insn (gen_movsi_pic_label_ref (operands[0], operands[1]));
  	      return true;
  	    }
  
  	  if (mode == DImode)
  	    {
  	      gcc_assert (TARGET_ARCH64);
  	      emit_insn (gen_movdi_pic_label_ref (operands[0], operands[1]));
  	      return true;
  	    }
  	}
  
        if (symbolic_operand (operands[1], mode))
  	{
  	  operands[1]
  	    = sparc_legitimize_pic_address (operands[1],
  					    reload_in_progress
  					    ? operands[0] : NULL_RTX);
  	  return false;
  	}
      }
  
    /* If we are trying to toss an integer constant into FP registers,
       or loading a FP or vector constant, force it into memory.  */
    if (CONSTANT_P (operands[1])
        && REG_P (operands[0])
        && (SPARC_FP_REG_P (REGNO (operands[0]))
  	  || SCALAR_FLOAT_MODE_P (mode)
  	  || VECTOR_MODE_P (mode)))
      {
        /* emit_group_store will send such bogosity to us when it is
           not storing directly into memory.  So fix this up to avoid
           crashes in output_constant_pool.  */
        if (operands [1] == const0_rtx)
  	operands[1] = CONST0_RTX (mode);
  
        /* We can clear or set to all-ones FP registers if TARGET_VIS, and
  	 always other regs.  */
        if ((TARGET_VIS || REGNO (operands[0]) < SPARC_FIRST_FP_REG)
  	  && (const_zero_operand (operands[1], mode)
  	      || const_all_ones_operand (operands[1], mode)))
  	return false;
  
        if (REGNO (operands[0]) < SPARC_FIRST_FP_REG
  	  /* We are able to build any SF constant in integer registers
  	     with at most 2 instructions.  */
  	  && (mode == SFmode
  	      /* And any DF constant in integer registers.  */
  	      || (mode == DFmode
  		  && ! can_create_pseudo_p ())))
  	return false;
  
        operands[1] = force_const_mem (mode, operands[1]);
        if (!reload_in_progress)
  	operands[1] = validize_mem (operands[1]);
        return false;
      }
  
    /* Accept non-constants and valid constants unmodified.  */
    if (!CONSTANT_P (operands[1])
        || GET_CODE (operands[1]) == HIGH
        || input_operand (operands[1], mode))
      return false;
  
    switch (mode)
      {
      case QImode:
        /* All QImode constants require only one insn, so proceed.  */
        break;
  
      case HImode:
      case SImode:
        sparc_emit_set_const32 (operands[0], operands[1]);
        return true;
  
      case DImode:
        /* input_operand should have filtered out 32-bit mode.  */
        sparc_emit_set_const64 (operands[0], operands[1]);
        return true;
  
      default:
        gcc_unreachable ();
      }
  
    return false;
  }
  
  /* Load OP1, a 32-bit constant, into OP0, a register.
     We know it can't be done in one insn when we get
     here, the move expander guarantees this.  */
  
  static void
  sparc_emit_set_const32 (rtx op0, rtx op1)
  {
    enum machine_mode mode = GET_MODE (op0);
    rtx temp = op0;
  
    if (can_create_pseudo_p ())
      temp = gen_reg_rtx (mode);
  
    if (GET_CODE (op1) == CONST_INT)
      {
        gcc_assert (!small_int_operand (op1, mode)
  		  && !const_high_operand (op1, mode));
  
        /* Emit them as real moves instead of a HIGH/LO_SUM,
  	 this way CSE can see everything and reuse intermediate
  	 values if it wants.  */
        emit_insn (gen_rtx_SET (VOIDmode, temp,
  			      GEN_INT (INTVAL (op1)
  			        & ~(HOST_WIDE_INT)0x3ff)));
  
        emit_insn (gen_rtx_SET (VOIDmode,
  			      op0,
  			      gen_rtx_IOR (mode, temp,
  					   GEN_INT (INTVAL (op1) & 0x3ff))));
      }
    else
      {
        /* A symbol, emit in the traditional way.  */
        emit_insn (gen_rtx_SET (VOIDmode, temp,
  			      gen_rtx_HIGH (mode, op1)));
        emit_insn (gen_rtx_SET (VOIDmode,
  			      op0, gen_rtx_LO_SUM (mode, temp, op1)));
      }
  }
  
  /* Load OP1, a symbolic 64-bit constant, into OP0, a DImode register.
     If TEMP is nonzero, we are forbidden to use any other scratch
     registers.  Otherwise, we are allowed to generate them as needed.
  
     Note that TEMP may have TImode if the code model is TARGET_CM_MEDANY
     or TARGET_CM_EMBMEDANY (see the reload_indi and reload_outdi patterns).  */
  
  void
  sparc_emit_set_symbolic_const64 (rtx op0, rtx op1, rtx temp)
  {
    rtx temp1, temp2, temp3, temp4, temp5;
    rtx ti_temp = 0;
  
    if (temp && GET_MODE (temp) == TImode)
      {
        ti_temp = temp;
        temp = gen_rtx_REG (DImode, REGNO (temp));
      }
  
    /* SPARC-V9 code-model support.  */
    switch (sparc_cmodel)
      {
      case CM_MEDLOW:
        /* The range spanned by all instructions in the object is less
  	 than 2^31 bytes (2GB) and the distance from any instruction
  	 to the location of the label _GLOBAL_OFFSET_TABLE_ is less
  	 than 2^31 bytes (2GB).
  
  	 The executable must be in the low 4TB of the virtual address
  	 space.
  
  	 sethi	%hi(symbol), %temp1
  	 or	%temp1, %lo(symbol), %reg  */
        if (temp)
  	temp1 = temp;  /* op0 is allowed.  */
        else
  	temp1 = gen_reg_rtx (DImode);
  
        emit_insn (gen_rtx_SET (VOIDmode, temp1, gen_rtx_HIGH (DImode, op1)));
        emit_insn (gen_rtx_SET (VOIDmode, op0, gen_rtx_LO_SUM (DImode, temp1, op1)));
        break;
  
      case CM_MEDMID:
        /* The range spanned by all instructions in the object is less
  	 than 2^31 bytes (2GB) and the distance from any instruction
  	 to the location of the label _GLOBAL_OFFSET_TABLE_ is less
  	 than 2^31 bytes (2GB).
  
  	 The executable must be in the low 16TB of the virtual address
  	 space.
  
  	 sethi	%h44(symbol), %temp1
  	 or	%temp1, %m44(symbol), %temp2
  	 sllx	%temp2, 12, %temp3
  	 or	%temp3, %l44(symbol), %reg  */
        if (temp)
  	{
  	  temp1 = op0;
  	  temp2 = op0;
  	  temp3 = temp;  /* op0 is allowed.  */
  	}
        else
  	{
  	  temp1 = gen_reg_rtx (DImode);
  	  temp2 = gen_reg_rtx (DImode);
  	  temp3 = gen_reg_rtx (DImode);
  	}
  
        emit_insn (gen_seth44 (temp1, op1));
        emit_insn (gen_setm44 (temp2, temp1, op1));
        emit_insn (gen_rtx_SET (VOIDmode, temp3,
  			      gen_rtx_ASHIFT (DImode, temp2, GEN_INT (12))));
        emit_insn (gen_setl44 (op0, temp3, op1));
        break;
  
      case CM_MEDANY:
        /* The range spanned by all instructions in the object is less
  	 than 2^31 bytes (2GB) and the distance from any instruction
  	 to the location of the label _GLOBAL_OFFSET_TABLE_ is less
  	 than 2^31 bytes (2GB).
  
  	 The executable can be placed anywhere in the virtual address
  	 space.
  
  	 sethi	%hh(symbol), %temp1
  	 sethi	%lm(symbol), %temp2
  	 or	%temp1, %hm(symbol), %temp3
  	 sllx	%temp3, 32, %temp4
  	 or	%temp4, %temp2, %temp5
  	 or	%temp5, %lo(symbol), %reg  */
        if (temp)
  	{
  	  /* It is possible that one of the registers we got for operands[2]
  	     might coincide with that of operands[0] (which is why we made
  	     it TImode).  Pick the other one to use as our scratch.  */
  	  if (rtx_equal_p (temp, op0))
  	    {
  	      gcc_assert (ti_temp);
  	      temp = gen_rtx_REG (DImode, REGNO (temp) + 1);
  	    }
  	  temp1 = op0;
  	  temp2 = temp;  /* op0 is _not_ allowed, see above.  */
  	  temp3 = op0;
  	  temp4 = op0;
  	  temp5 = op0;
  	}
        else
  	{
  	  temp1 = gen_reg_rtx (DImode);
  	  temp2 = gen_reg_rtx (DImode);
  	  temp3 = gen_reg_rtx (DImode);
  	  temp4 = gen_reg_rtx (DImode);
  	  temp5 = gen_reg_rtx (DImode);
  	}
  
        emit_insn (gen_sethh (temp1, op1));
        emit_insn (gen_setlm (temp2, op1));
        emit_insn (gen_sethm (temp3, temp1, op1));
        emit_insn (gen_rtx_SET (VOIDmode, temp4,
  			      gen_rtx_ASHIFT (DImode, temp3, GEN_INT (32))));
        emit_insn (gen_rtx_SET (VOIDmode, temp5,
  			      gen_rtx_PLUS (DImode, temp4, temp2)));
        emit_insn (gen_setlo (op0, temp5, op1));
        break;
  
      case CM_EMBMEDANY:
        /* Old old old backwards compatibility kruft here.
  	 Essentially it is MEDLOW with a fixed 64-bit
  	 virtual base added to all data segment addresses.
  	 Text-segment stuff is computed like MEDANY, we can't
  	 reuse the code above because the relocation knobs
  	 look different.
  
  	 Data segment:	sethi	%hi(symbol), %temp1
  			add	%temp1, EMBMEDANY_BASE_REG, %temp2
  			or	%temp2, %lo(symbol), %reg  */
        if (data_segment_operand (op1, GET_MODE (op1)))
  	{
  	  if (temp)
  	    {
  	      temp1 = temp;  /* op0 is allowed.  */
  	      temp2 = op0;
  	    }
  	  else
  	    {
  	      temp1 = gen_reg_rtx (DImode);
  	      temp2 = gen_reg_rtx (DImode);
  	    }
  
  	  emit_insn (gen_embmedany_sethi (temp1, op1));
  	  emit_insn (gen_embmedany_brsum (temp2, temp1));
  	  emit_insn (gen_embmedany_losum (op0, temp2, op1));
  	}
  
        /* Text segment:	sethi	%uhi(symbol), %temp1
  			sethi	%hi(symbol), %temp2
  			or	%temp1, %ulo(symbol), %temp3
  			sllx	%temp3, 32, %temp4
  			or	%temp4, %temp2, %temp5
  			or	%temp5, %lo(symbol), %reg  */
        else
  	{
  	  if (temp)
  	    {
  	      /* It is possible that one of the registers we got for operands[2]
  		 might coincide with that of operands[0] (which is why we made
  		 it TImode).  Pick the other one to use as our scratch.  */
  	      if (rtx_equal_p (temp, op0))
  		{
  		  gcc_assert (ti_temp);
  		  temp = gen_rtx_REG (DImode, REGNO (temp) + 1);
  		}
  	      temp1 = op0;
  	      temp2 = temp;  /* op0 is _not_ allowed, see above.  */
  	      temp3 = op0;
  	      temp4 = op0;
  	      temp5 = op0;
  	    }
  	  else
  	    {
  	      temp1 = gen_reg_rtx (DImode);
  	      temp2 = gen_reg_rtx (DImode);
  	      temp3 = gen_reg_rtx (DImode);
  	      temp4 = gen_reg_rtx (DImode);
  	      temp5 = gen_reg_rtx (DImode);
  	    }
  
  	  emit_insn (gen_embmedany_textuhi (temp1, op1));
  	  emit_insn (gen_embmedany_texthi  (temp2, op1));
  	  emit_insn (gen_embmedany_textulo (temp3, temp1, op1));
  	  emit_insn (gen_rtx_SET (VOIDmode, temp4,
  				  gen_rtx_ASHIFT (DImode, temp3, GEN_INT (32))));
  	  emit_insn (gen_rtx_SET (VOIDmode, temp5,
  				  gen_rtx_PLUS (DImode, temp4, temp2)));
  	  emit_insn (gen_embmedany_textlo  (op0, temp5, op1));
  	}
        break;
  
      default:
        gcc_unreachable ();
      }
  }
  
  #if HOST_BITS_PER_WIDE_INT == 32
  static void
  sparc_emit_set_const64 (rtx op0 ATTRIBUTE_UNUSED, rtx op1 ATTRIBUTE_UNUSED)
  {
    gcc_unreachable ();
  }
  #else
  /* These avoid problems when cross compiling.  If we do not
     go through all this hair then the optimizer will see
     invalid REG_EQUAL notes or in some cases none at all.  */
  static rtx gen_safe_HIGH64 (rtx, HOST_WIDE_INT);
  static rtx gen_safe_SET64 (rtx, HOST_WIDE_INT);
  static rtx gen_safe_OR64 (rtx, HOST_WIDE_INT);
  static rtx gen_safe_XOR64 (rtx, HOST_WIDE_INT);
  
  /* The optimizer is not to assume anything about exactly
     which bits are set for a HIGH, they are unspecified.
     Unfortunately this leads to many missed optimizations
     during CSE.  We mask out the non-HIGH bits, and matches
     a plain movdi, to alleviate this problem.  */
  static rtx
  gen_safe_HIGH64 (rtx dest, HOST_WIDE_INT val)
  {
    return gen_rtx_SET (VOIDmode, dest, GEN_INT (val & ~(HOST_WIDE_INT)0x3ff));
  }
  
  static rtx
  gen_safe_SET64 (rtx dest, HOST_WIDE_INT val)
  {
    return gen_rtx_SET (VOIDmode, dest, GEN_INT (val));
  }
  
  static rtx
  gen_safe_OR64 (rtx src, HOST_WIDE_INT val)
  {
    return gen_rtx_IOR (DImode, src, GEN_INT (val));
  }
  
  static rtx
  gen_safe_XOR64 (rtx src, HOST_WIDE_INT val)
  {
    return gen_rtx_XOR (DImode, src, GEN_INT (val));
  }
  
  /* Worker routines for 64-bit constant formation on arch64.
     One of the key things to be doing in these emissions is
     to create as many temp REGs as possible.  This makes it
     possible for half-built constants to be used later when
     such values are similar to something required later on.
     Without doing this, the optimizer cannot see such
     opportunities.  */
  
  static void sparc_emit_set_const64_quick1 (rtx, rtx,
  					   unsigned HOST_WIDE_INT, int);
  
  static void
  sparc_emit_set_const64_quick1 (rtx op0, rtx temp,
  			       unsigned HOST_WIDE_INT low_bits, int is_neg)
  {
    unsigned HOST_WIDE_INT high_bits;
  
    if (is_neg)
      high_bits = (~low_bits) & 0xffffffff;
    else
      high_bits = low_bits;
  
    emit_insn (gen_safe_HIGH64 (temp, high_bits));
    if (!is_neg)
      {
        emit_insn (gen_rtx_SET (VOIDmode, op0,
  			      gen_safe_OR64 (temp, (high_bits & 0x3ff))));
      }
    else
      {
        /* If we are XOR'ing with -1, then we should emit a one's complement
  	 instead.  This way the combiner will notice logical operations
  	 such as ANDN later on and substitute.  */
        if ((low_bits & 0x3ff) == 0x3ff)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_NOT (DImode, temp)));
  	}
        else
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_safe_XOR64 (temp,
  						  (-(HOST_WIDE_INT)0x400
  						   | (low_bits & 0x3ff)))));
  	}
      }
  }
  
  static void sparc_emit_set_const64_quick2 (rtx, rtx, unsigned HOST_WIDE_INT,
  					   unsigned HOST_WIDE_INT, int);
  
  static void
  sparc_emit_set_const64_quick2 (rtx op0, rtx temp,
  			       unsigned HOST_WIDE_INT high_bits,
  			       unsigned HOST_WIDE_INT low_immediate,
  			       int shift_count)
  {
    rtx temp2 = op0;
  
    if ((high_bits & 0xfffffc00) != 0)
      {
        emit_insn (gen_safe_HIGH64 (temp, high_bits));
        if ((high_bits & ~0xfffffc00) != 0)
  	emit_insn (gen_rtx_SET (VOIDmode, op0,
  				gen_safe_OR64 (temp, (high_bits & 0x3ff))));
        else
  	temp2 = temp;
      }
    else
      {
        emit_insn (gen_safe_SET64 (temp, high_bits));
        temp2 = temp;
      }
  
    /* Now shift it up into place.  */
    emit_insn (gen_rtx_SET (VOIDmode, op0,
  			  gen_rtx_ASHIFT (DImode, temp2,
  					  GEN_INT (shift_count))));
  
    /* If there is a low immediate part piece, finish up by
       putting that in as well.  */
    if (low_immediate != 0)
      emit_insn (gen_rtx_SET (VOIDmode, op0,
  			    gen_safe_OR64 (op0, low_immediate)));
  }
  
  static void sparc_emit_set_const64_longway (rtx, rtx, unsigned HOST_WIDE_INT,
  					    unsigned HOST_WIDE_INT);
  
  /* Full 64-bit constant decomposition.  Even though this is the
     'worst' case, we still optimize a few things away.  */
  static void
  sparc_emit_set_const64_longway (rtx op0, rtx temp,
  				unsigned HOST_WIDE_INT high_bits,
  				unsigned HOST_WIDE_INT low_bits)
  {
    rtx sub_temp = op0;
  
    if (can_create_pseudo_p ())
      sub_temp = gen_reg_rtx (DImode);
  
    if ((high_bits & 0xfffffc00) != 0)
      {
        emit_insn (gen_safe_HIGH64 (temp, high_bits));
        if ((high_bits & ~0xfffffc00) != 0)
  	emit_insn (gen_rtx_SET (VOIDmode,
  				sub_temp,
  				gen_safe_OR64 (temp, (high_bits & 0x3ff))));
        else
  	sub_temp = temp;
      }
    else
      {
        emit_insn (gen_safe_SET64 (temp, high_bits));
        sub_temp = temp;
      }
  
    if (can_create_pseudo_p ())
      {
        rtx temp2 = gen_reg_rtx (DImode);
        rtx temp3 = gen_reg_rtx (DImode);
        rtx temp4 = gen_reg_rtx (DImode);
  
        emit_insn (gen_rtx_SET (VOIDmode, temp4,
  			      gen_rtx_ASHIFT (DImode, sub_temp,
  					      GEN_INT (32))));
  
        emit_insn (gen_safe_HIGH64 (temp2, low_bits));
        if ((low_bits & ~0xfffffc00) != 0)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, temp3,
  				  gen_safe_OR64 (temp2, (low_bits & 0x3ff))));
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_PLUS (DImode, temp4, temp3)));
  	}
        else
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_PLUS (DImode, temp4, temp2)));
  	}
      }
    else
      {
        rtx low1 = GEN_INT ((low_bits >> (32 - 12))          & 0xfff);
        rtx low2 = GEN_INT ((low_bits >> (32 - 12 - 12))     & 0xfff);
        rtx low3 = GEN_INT ((low_bits >> (32 - 12 - 12 - 8)) & 0x0ff);
        int to_shift = 12;
  
        /* We are in the middle of reload, so this is really
  	 painful.  However we do still make an attempt to
  	 avoid emitting truly stupid code.  */
        if (low1 != const0_rtx)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_ASHIFT (DImode, sub_temp,
  						  GEN_INT (to_shift))));
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_IOR (DImode, op0, low1)));
  	  sub_temp = op0;
  	  to_shift = 12;
  	}
        else
  	{
  	  to_shift += 12;
  	}
        if (low2 != const0_rtx)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_ASHIFT (DImode, sub_temp,
  						  GEN_INT (to_shift))));
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_IOR (DImode, op0, low2)));
  	  sub_temp = op0;
  	  to_shift = 8;
  	}
        else
  	{
  	  to_shift += 8;
  	}
        emit_insn (gen_rtx_SET (VOIDmode, op0,
  			      gen_rtx_ASHIFT (DImode, sub_temp,
  					      GEN_INT (to_shift))));
        if (low3 != const0_rtx)
  	emit_insn (gen_rtx_SET (VOIDmode, op0,
  				gen_rtx_IOR (DImode, op0, low3)));
        /* phew...  */
      }
  }
  
  /* Analyze a 64-bit constant for certain properties.  */
  static void analyze_64bit_constant (unsigned HOST_WIDE_INT,
  				    unsigned HOST_WIDE_INT,
  				    int *, int *, int *);
  
  static void
  analyze_64bit_constant (unsigned HOST_WIDE_INT high_bits,
  			unsigned HOST_WIDE_INT low_bits,
  			int *hbsp, int *lbsp, int *abbasp)
  {
    int lowest_bit_set, highest_bit_set, all_bits_between_are_set;
    int i;
  
    lowest_bit_set = highest_bit_set = -1;
    i = 0;
    do
      {
        if ((lowest_bit_set == -1)
  	  && ((low_bits >> i) & 1))
  	lowest_bit_set = i;
        if ((highest_bit_set == -1)
  	  && ((high_bits >> (32 - i - 1)) & 1))
  	highest_bit_set = (64 - i - 1);
      }
    while (++i < 32
  	 && ((highest_bit_set == -1)
  	     || (lowest_bit_set == -1)));
    if (i == 32)
      {
        i = 0;
        do
  	{
  	  if ((lowest_bit_set == -1)
  	      && ((high_bits >> i) & 1))
  	    lowest_bit_set = i + 32;
  	  if ((highest_bit_set == -1)
  	      && ((low_bits >> (32 - i - 1)) & 1))
  	    highest_bit_set = 32 - i - 1;
  	}
        while (++i < 32
  	     && ((highest_bit_set == -1)
  		 || (lowest_bit_set == -1)));
      }
    /* If there are no bits set this should have gone out
       as one instruction!  */
    gcc_assert (lowest_bit_set != -1 && highest_bit_set != -1);
    all_bits_between_are_set = 1;
    for (i = lowest_bit_set; i <= highest_bit_set; i++)
      {
        if (i < 32)
  	{
  	  if ((low_bits & (1 << i)) != 0)
  	    continue;
  	}
        else
  	{
  	  if ((high_bits & (1 << (i - 32))) != 0)
  	    continue;
  	}
        all_bits_between_are_set = 0;
        break;
      }
    *hbsp = highest_bit_set;
    *lbsp = lowest_bit_set;
    *abbasp = all_bits_between_are_set;
  }
  
  static int const64_is_2insns (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT);
  
  static int
  const64_is_2insns (unsigned HOST_WIDE_INT high_bits,
  		   unsigned HOST_WIDE_INT low_bits)
  {
    int highest_bit_set, lowest_bit_set, all_bits_between_are_set;
  
    if (high_bits == 0
        || high_bits == 0xffffffff)
      return 1;
  
    analyze_64bit_constant (high_bits, low_bits,
  			  &highest_bit_set, &lowest_bit_set,
  			  &all_bits_between_are_set);
  
    if ((highest_bit_set == 63
         || lowest_bit_set == 0)
        && all_bits_between_are_set != 0)
      return 1;
  
    if ((highest_bit_set - lowest_bit_set) < 21)
      return 1;
  
    return 0;
  }
  
  static unsigned HOST_WIDE_INT create_simple_focus_bits (unsigned HOST_WIDE_INT,
  							unsigned HOST_WIDE_INT,
  							int, int);
  
  static unsigned HOST_WIDE_INT
  create_simple_focus_bits (unsigned HOST_WIDE_INT high_bits,
  			  unsigned HOST_WIDE_INT low_bits,
  			  int lowest_bit_set, int shift)
  {
    HOST_WIDE_INT hi, lo;
  
    if (lowest_bit_set < 32)
      {
        lo = (low_bits >> lowest_bit_set) << shift;
        hi = ((high_bits << (32 - lowest_bit_set)) << shift);
      }
    else
      {
        lo = 0;
        hi = ((high_bits >> (lowest_bit_set - 32)) << shift);
      }
    gcc_assert (! (hi & lo));
    return (hi | lo);
  }
  
  /* Here we are sure to be arch64 and this is an integer constant
     being loaded into a register.  Emit the most efficient
     insn sequence possible.  Detection of all the 1-insn cases
     has been done already.  */
  static void
  sparc_emit_set_const64 (rtx op0, rtx op1)
  {
    unsigned HOST_WIDE_INT high_bits, low_bits;
    int lowest_bit_set, highest_bit_set;
    int all_bits_between_are_set;
    rtx temp = 0;
  
    /* Sanity check that we know what we are working with.  */
    gcc_assert (TARGET_ARCH64
  	      && (GET_CODE (op0) == SUBREG
  		  || (REG_P (op0) && ! SPARC_FP_REG_P (REGNO (op0)))));
  
    if (! can_create_pseudo_p ())
      temp = op0;
  
    if (GET_CODE (op1) != CONST_INT)
      {
        sparc_emit_set_symbolic_const64 (op0, op1, temp);
        return;
      }
  
    if (! temp)
      temp = gen_reg_rtx (DImode);
  
    high_bits = ((INTVAL (op1) >> 32) & 0xffffffff);
    low_bits = (INTVAL (op1) & 0xffffffff);
  
    /* low_bits	bits 0  --> 31
       high_bits	bits 32 --> 63  */
  
    analyze_64bit_constant (high_bits, low_bits,
  			  &highest_bit_set, &lowest_bit_set,
  			  &all_bits_between_are_set);
  
    /* First try for a 2-insn sequence.  */
  
    /* These situations are preferred because the optimizer can
     * do more things with them:
     * 1) mov	-1, %reg
     *    sllx	%reg, shift, %reg
     * 2) mov	-1, %reg
     *    srlx	%reg, shift, %reg
     * 3) mov	some_small_const, %reg
     *    sllx	%reg, shift, %reg
     */
    if (((highest_bit_set == 63
  	|| lowest_bit_set == 0)
         && all_bits_between_are_set != 0)
        || ((highest_bit_set - lowest_bit_set) < 12))
      {
        HOST_WIDE_INT the_const = -1;
        int shift = lowest_bit_set;
  
        if ((highest_bit_set != 63
  	   && lowest_bit_set != 0)
  	  || all_bits_between_are_set == 0)
  	{
  	  the_const =
  	    create_simple_focus_bits (high_bits, low_bits,
  				      lowest_bit_set, 0);
  	}
        else if (lowest_bit_set == 0)
  	shift = -(63 - highest_bit_set);
  
        gcc_assert (SPARC_SIMM13_P (the_const));
        gcc_assert (shift != 0);
  
        emit_insn (gen_safe_SET64 (temp, the_const));
        if (shift > 0)
  	emit_insn (gen_rtx_SET (VOIDmode,
  				op0,
  				gen_rtx_ASHIFT (DImode,
  						temp,
  						GEN_INT (shift))));
        else if (shift < 0)
  	emit_insn (gen_rtx_SET (VOIDmode,
  				op0,
  				gen_rtx_LSHIFTRT (DImode,
  						  temp,
  						  GEN_INT (-shift))));
        return;
      }
  
    /* Now a range of 22 or less bits set somewhere.
     * 1) sethi	%hi(focus_bits), %reg
     *    sllx	%reg, shift, %reg
     * 2) sethi	%hi(focus_bits), %reg
     *    srlx	%reg, shift, %reg
     */
    if ((highest_bit_set - lowest_bit_set) < 21)
      {
        unsigned HOST_WIDE_INT focus_bits =
  	create_simple_focus_bits (high_bits, low_bits,
  				  lowest_bit_set, 10);
  
        gcc_assert (SPARC_SETHI_P (focus_bits));
        gcc_assert (lowest_bit_set != 10);
  
        emit_insn (gen_safe_HIGH64 (temp, focus_bits));
  
        /* If lowest_bit_set == 10 then a sethi alone could have done it.  */
        if (lowest_bit_set < 10)
  	emit_insn (gen_rtx_SET (VOIDmode,
  				op0,
  				gen_rtx_LSHIFTRT (DImode, temp,
  						  GEN_INT (10 - lowest_bit_set))));
        else if (lowest_bit_set > 10)
  	emit_insn (gen_rtx_SET (VOIDmode,
  				op0,
  				gen_rtx_ASHIFT (DImode, temp,
  						GEN_INT (lowest_bit_set - 10))));
        return;
      }
  
    /* 1) sethi	%hi(low_bits), %reg
     *    or	%reg, %lo(low_bits), %reg
     * 2) sethi	%hi(~low_bits), %reg
     *	xor	%reg, %lo(-0x400 | (low_bits & 0x3ff)), %reg
     */
    if (high_bits == 0
        || high_bits == 0xffffffff)
      {
        sparc_emit_set_const64_quick1 (op0, temp, low_bits,
  				     (high_bits == 0xffffffff));
        return;
      }
  
    /* Now, try 3-insn sequences.  */
  
    /* 1) sethi	%hi(high_bits), %reg
     *    or	%reg, %lo(high_bits), %reg
     *    sllx	%reg, 32, %reg
     */
    if (low_bits == 0)
      {
        sparc_emit_set_const64_quick2 (op0, temp, high_bits, 0, 32);
        return;
      }
  
    /* We may be able to do something quick
       when the constant is negated, so try that.  */
    if (const64_is_2insns ((~high_bits) & 0xffffffff,
  			 (~low_bits) & 0xfffffc00))
      {
        /* NOTE: The trailing bits get XOR'd so we need the
  	 non-negated bits, not the negated ones.  */
        unsigned HOST_WIDE_INT trailing_bits = low_bits & 0x3ff;
  
        if ((((~high_bits) & 0xffffffff) == 0
  	   && ((~low_bits) & 0x80000000) == 0)
  	  || (((~high_bits) & 0xffffffff) == 0xffffffff
  	      && ((~low_bits) & 0x80000000) != 0))
  	{
  	  unsigned HOST_WIDE_INT fast_int = (~low_bits & 0xffffffff);
  
  	  if ((SPARC_SETHI_P (fast_int)
  	       && (~high_bits & 0xffffffff) == 0)
  	      || SPARC_SIMM13_P (fast_int))
  	    emit_insn (gen_safe_SET64 (temp, fast_int));
  	  else
  	    sparc_emit_set_const64 (temp, GEN_INT (fast_int));
  	}
        else
  	{
  	  rtx negated_const;
  	  negated_const = GEN_INT (((~low_bits) & 0xfffffc00) |
  				   (((HOST_WIDE_INT)((~high_bits) & 0xffffffff))<<32));
  	  sparc_emit_set_const64 (temp, negated_const);
  	}
  
        /* If we are XOR'ing with -1, then we should emit a one's complement
  	 instead.  This way the combiner will notice logical operations
  	 such as ANDN later on and substitute.  */
        if (trailing_bits == 0x3ff)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, op0,
  				  gen_rtx_NOT (DImode, temp)));
  	}
        else
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode,
  				  op0,
  				  gen_safe_XOR64 (temp,
  						  (-0x400 | trailing_bits))));
  	}
        return;
      }
  
    /* 1) sethi	%hi(xxx), %reg
     *    or	%reg, %lo(xxx), %reg
     *	sllx	%reg, yyy, %reg
     *
     * ??? This is just a generalized version of the low_bits==0
     * thing above, FIXME...
     */
    if ((highest_bit_set - lowest_bit_set) < 32)
      {
        unsigned HOST_WIDE_INT focus_bits =
  	create_simple_focus_bits (high_bits, low_bits,
  				  lowest_bit_set, 0);
  
        /* We can't get here in this state.  */
        gcc_assert (highest_bit_set >= 32 && lowest_bit_set < 32);
  
        /* So what we know is that the set bits straddle the
  	 middle of the 64-bit word.  */
        sparc_emit_set_const64_quick2 (op0, temp,
  				     focus_bits, 0,
  				     lowest_bit_set);
        return;
      }
  
    /* 1) sethi	%hi(high_bits), %reg
     *    or	%reg, %lo(high_bits), %reg
     *    sllx	%reg, 32, %reg
     *	or	%reg, low_bits, %reg
     */
    if (SPARC_SIMM13_P(low_bits)
        && ((int)low_bits > 0))
      {
        sparc_emit_set_const64_quick2 (op0, temp, high_bits, low_bits, 32);
        return;
      }
  
    /* The easiest way when all else fails, is full decomposition.  */
    sparc_emit_set_const64_longway (op0, temp, high_bits, low_bits);
  }
  #endif /* HOST_BITS_PER_WIDE_INT == 32 */
  
  /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
     return the mode to be used for the comparison.  For floating-point,
     CCFP[E]mode is used.  CC_NOOVmode should be used when the first operand
     is a PLUS, MINUS, NEG, or ASHIFT.  CCmode should be used when no special
     processing is needed.  */
  
  enum machine_mode
  select_cc_mode (enum rtx_code op, rtx x, rtx y ATTRIBUTE_UNUSED)
  {
    if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
      {
        switch (op)
  	{
  	case EQ:
  	case NE:
  	case UNORDERED:
  	case ORDERED:
  	case UNLT:
  	case UNLE:
  	case UNGT:
  	case UNGE:
  	case UNEQ:
  	case LTGT:
  	  return CCFPmode;
  
  	case LT:
  	case LE:
  	case GT:
  	case GE:
  	  return CCFPEmode;
  
  	default:
  	  gcc_unreachable ();
  	}
      }
    else if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS
  	   || GET_CODE (x) == NEG || GET_CODE (x) == ASHIFT)
      {
        if (TARGET_ARCH64 && GET_MODE (x) == DImode)
  	return CCX_NOOVmode;
        else
  	return CC_NOOVmode;
      }
    else
      {
        if (TARGET_ARCH64 && GET_MODE (x) == DImode)
  	return CCXmode;
        else
  	return CCmode;
      }
  }
  
  /* Emit the compare insn and return the CC reg for a CODE comparison
     with operands X and Y.  */
  
  static rtx
  gen_compare_reg_1 (enum rtx_code code, rtx x, rtx y)
  {
    enum machine_mode mode;
    rtx cc_reg;
  
    if (GET_MODE_CLASS (GET_MODE (x)) == MODE_CC)
      return x;
  
    mode = SELECT_CC_MODE (code, x, y);
  
    /* ??? We don't have movcc patterns so we cannot generate pseudo regs for the
       fcc regs (cse can't tell they're really call clobbered regs and will
       remove a duplicate comparison even if there is an intervening function
       call - it will then try to reload the cc reg via an int reg which is why
       we need the movcc patterns).  It is possible to provide the movcc
       patterns by using the ldxfsr/stxfsr v9 insns.  I tried it: you need two
       registers (say %g1,%g5) and it takes about 6 insns.  A better fix would be
       to tell cse that CCFPE mode registers (even pseudos) are call
       clobbered.  */
  
    /* ??? This is an experiment.  Rather than making changes to cse which may
       or may not be easy/clean, we do our own cse.  This is possible because
       we will generate hard registers.  Cse knows they're call clobbered (it
       doesn't know the same thing about pseudos). If we guess wrong, no big
       deal, but if we win, great!  */
  
    if (TARGET_V9 && GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
  #if 1 /* experiment */
      {
        int reg;
        /* We cycle through the registers to ensure they're all exercised.  */
        static int next_fcc_reg = 0;
        /* Previous x,y for each fcc reg.  */
        static rtx prev_args[4][2];
  
        /* Scan prev_args for x,y.  */
        for (reg = 0; reg < 4; reg++)
  	if (prev_args[reg][0] == x && prev_args[reg][1] == y)
  	  break;
        if (reg == 4)
  	{
  	  reg = next_fcc_reg;
  	  prev_args[reg][0] = x;
  	  prev_args[reg][1] = y;
  	  next_fcc_reg = (next_fcc_reg + 1) & 3;
  	}
        cc_reg = gen_rtx_REG (mode, reg + SPARC_FIRST_V9_FCC_REG);
      }
  #else
      cc_reg = gen_reg_rtx (mode);
  #endif /* ! experiment */
    else if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
      cc_reg = gen_rtx_REG (mode, SPARC_FCC_REG);
    else
      cc_reg = gen_rtx_REG (mode, SPARC_ICC_REG);
  
    /* We shouldn't get there for TFmode if !TARGET_HARD_QUAD.  If we do, this
       will only result in an unrecognizable insn so no point in asserting.  */
    emit_insn (gen_rtx_SET (VOIDmode, cc_reg, gen_rtx_COMPARE (mode, x, y)));
  
    return cc_reg;
  }
  
  
  /* Emit the compare insn and return the CC reg for the comparison in CMP.  */
  
  rtx
  gen_compare_reg (rtx cmp)
  {
    return gen_compare_reg_1 (GET_CODE (cmp), XEXP (cmp, 0), XEXP (cmp, 1));
  }
  
  /* This function is used for v9 only.
     DEST is the target of the Scc insn.
     CODE is the code for an Scc's comparison.
     X and Y are the values we compare.
  
     This function is needed to turn
  
  	   (set (reg:SI 110)
  	       (gt (reg:CCX 100 %icc)
  	           (const_int 0)))
     into
  	   (set (reg:SI 110)
  	       (gt:DI (reg:CCX 100 %icc)
  	           (const_int 0)))
  
     IE: The instruction recognizer needs to see the mode of the comparison to
     find the right instruction. We could use "gt:DI" right in the
     define_expand, but leaving it out allows us to handle DI, SI, etc.  */
  
  static int
  gen_v9_scc (rtx dest, enum rtx_code compare_code, rtx x, rtx y)
  {
    if (! TARGET_ARCH64
        && (GET_MODE (x) == DImode
  	  || GET_MODE (dest) == DImode))
      return 0;
  
    /* Try to use the movrCC insns.  */
    if (TARGET_ARCH64
        && GET_MODE_CLASS (GET_MODE (x)) == MODE_INT
        && y == const0_rtx
        && v9_regcmp_p (compare_code))
      {
        rtx op0 = x;
        rtx temp;
  
        /* Special case for op0 != 0.  This can be done with one instruction if
  	 dest == x.  */
  
        if (compare_code == NE
  	  && GET_MODE (dest) == DImode
  	  && rtx_equal_p (op0, dest))
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, dest,
  			      gen_rtx_IF_THEN_ELSE (DImode,
  				       gen_rtx_fmt_ee (compare_code, DImode,
  						       op0, const0_rtx),
  				       const1_rtx,
  				       dest)));
  	  return 1;
  	}
  
        if (reg_overlap_mentioned_p (dest, op0))
  	{
  	  /* Handle the case where dest == x.
  	     We "early clobber" the result.  */
  	  op0 = gen_reg_rtx (GET_MODE (x));
  	  emit_move_insn (op0, x);
  	}
  
        emit_insn (gen_rtx_SET (VOIDmode, dest, const0_rtx));
        if (GET_MODE (op0) != DImode)
  	{
  	  temp = gen_reg_rtx (DImode);
  	  convert_move (temp, op0, 0);
  	}
        else
  	temp = op0;
        emit_insn (gen_rtx_SET (VOIDmode, dest,
  			  gen_rtx_IF_THEN_ELSE (GET_MODE (dest),
  				   gen_rtx_fmt_ee (compare_code, DImode,
  						   temp, const0_rtx),
  				   const1_rtx,
  				   dest)));
        return 1;
      }
    else
      {
        x = gen_compare_reg_1 (compare_code, x, y);
        y = const0_rtx;
  
        gcc_assert (GET_MODE (x) != CC_NOOVmode
  		  && GET_MODE (x) != CCX_NOOVmode);
  
        emit_insn (gen_rtx_SET (VOIDmode, dest, const0_rtx));
        emit_insn (gen_rtx_SET (VOIDmode, dest,
  			  gen_rtx_IF_THEN_ELSE (GET_MODE (dest),
  				   gen_rtx_fmt_ee (compare_code,
  						   GET_MODE (x), x, y),
  				    const1_rtx, dest)));
        return 1;
      }
  }
  
  
  /* Emit an scc insn.  For seq, sne, sgeu, and sltu, we can do this
     without jumps using the addx/subx instructions.  */
  
  bool
  emit_scc_insn (rtx operands[])
  {
    rtx tem;
    rtx x;
    rtx y;
    enum rtx_code code;
  
    /* The quad-word fp compare library routines all return nonzero to indicate
       true, which is different from the equivalent libgcc routines, so we must
       handle them specially here.  */
    if (GET_MODE (operands[2]) == TFmode && ! TARGET_HARD_QUAD)
      {
        operands[1] = sparc_emit_float_lib_cmp (operands[2], operands[3],
  					      GET_CODE (operands[1]));
        operands[2] = XEXP (operands[1], 0);
        operands[3] = XEXP (operands[1], 1);
      }
  
    code = GET_CODE (operands[1]);
    x = operands[2];
    y = operands[3];
  
    /* For seq/sne on v9 we use the same code as v8 (the addx/subx method has
       more applications).  The exception to this is "reg != 0" which can
       be done in one instruction on v9 (so we do it).  */
    if (code == EQ)
      {
        if (GET_MODE (x) == SImode)
          {
            rtx pat = gen_seqsi_special (operands[0], x, y);
            emit_insn (pat);
            return true;
          }
        else if (GET_MODE (x) == DImode)
          {
  	  rtx pat = gen_seqdi_special (operands[0], x, y);
            emit_insn (pat);
            return true;
          }
      }
  
    if (code == NE)
      {
        if (GET_MODE (x) == SImode)
          {
            rtx pat = gen_snesi_special (operands[0], x, y);
            emit_insn (pat);
            return true;
          }
        else if (GET_MODE (x) == DImode)
          {
  	  rtx pat;
  	  if (TARGET_VIS3)
  	    pat = gen_snedi_special_vis3 (operands[0], x, y);
  	  else
  	    pat = gen_snedi_special (operands[0], x, y);
            emit_insn (pat);
            return true;
          }
      }
  
    if (TARGET_V9
        && TARGET_ARCH64
        && GET_MODE (x) == DImode
        && !(TARGET_VIS3
  	   && (code == GTU || code == LTU))
        && gen_v9_scc (operands[0], code, x, y))
      return true;
  
    /* We can do LTU and GEU using the addx/subx instructions too.  And
       for GTU/LEU, if both operands are registers swap them and fall
       back to the easy case.  */
    if (code == GTU || code == LEU)
      {
        if ((GET_CODE (x) == REG || GET_CODE (x) == SUBREG)
            && (GET_CODE (y) == REG || GET_CODE (y) == SUBREG))
          {
            tem = x;
            x = y;
            y = tem;
            code = swap_condition (code);
          }
      }
  
    if (code == LTU
        || (!TARGET_VIS3 && code == GEU))
      {
        emit_insn (gen_rtx_SET (VOIDmode, operands[0],
  			      gen_rtx_fmt_ee (code, SImode,
  					      gen_compare_reg_1 (code, x, y),
  					      const0_rtx)));
        return true;
      }
  
    /* All the posibilities to use addx/subx based sequences has been
       exhausted, try for a 3 instruction sequence using v9 conditional
       moves.  */
    if (TARGET_V9 && gen_v9_scc (operands[0], code, x, y))
      return true;
  
    /* Nope, do branches.  */
    return false;
  }
  
  /* Emit a conditional jump insn for the v9 architecture using comparison code
     CODE and jump target LABEL.
     This function exists to take advantage of the v9 brxx insns.  */
  
  static void
  emit_v9_brxx_insn (enum rtx_code code, rtx op0, rtx label)
  {
    emit_jump_insn (gen_rtx_SET (VOIDmode,
  			   pc_rtx,
  			   gen_rtx_IF_THEN_ELSE (VOIDmode,
  				    gen_rtx_fmt_ee (code, GET_MODE (op0),
  						    op0, const0_rtx),
  				    gen_rtx_LABEL_REF (VOIDmode, label),
  				    pc_rtx)));
  }
  
  void
  emit_conditional_branch_insn (rtx operands[])
  {
    /* The quad-word fp compare library routines all return nonzero to indicate
       true, which is different from the equivalent libgcc routines, so we must
       handle them specially here.  */
    if (GET_MODE (operands[1]) == TFmode && ! TARGET_HARD_QUAD)
      {
        operands[0] = sparc_emit_float_lib_cmp (operands[1], operands[2],
  					      GET_CODE (operands[0]));
        operands[1] = XEXP (operands[0], 0);
        operands[2] = XEXP (operands[0], 1);
      }
  
    if (TARGET_ARCH64 && operands[2] == const0_rtx
        && GET_CODE (operands[1]) == REG
        && GET_MODE (operands[1]) == DImode)
      {
        emit_v9_brxx_insn (GET_CODE (operands[0]), operands[1], operands[3]);
        return;
      }
  
    operands[1] = gen_compare_reg (operands[0]);
    operands[2] = const0_rtx;
    operands[0] = gen_rtx_fmt_ee (GET_CODE (operands[0]), VOIDmode,
  				operands[1], operands[2]);
    emit_jump_insn (gen_cbranchcc4 (operands[0], operands[1], operands[2],
  				  operands[3]));
  }
  
  
  /* Generate a DFmode part of a hard TFmode register.
     REG is the TFmode hard register, LOW is 1 for the
     low 64bit of the register and 0 otherwise.
   */
  rtx
  gen_df_reg (rtx reg, int low)
  {
    int regno = REGNO (reg);
  
    if ((WORDS_BIG_ENDIAN == 0) ^ (low != 0))
      regno += (TARGET_ARCH64 && SPARC_INT_REG_P (regno)) ? 1 : 2;
    return gen_rtx_REG (DFmode, regno);
  }
  
  /* Generate a call to FUNC with OPERANDS.  Operand 0 is the return value.
     Unlike normal calls, TFmode operands are passed by reference.  It is
     assumed that no more than 3 operands are required.  */
  
  static void
  emit_soft_tfmode_libcall (const char *func_name, int nargs, rtx *operands)
  {
    rtx ret_slot = NULL, arg[3], func_sym;
    int i;
  
    /* We only expect to be called for conversions, unary, and binary ops.  */
    gcc_assert (nargs == 2 || nargs == 3);
  
    for (i = 0; i < nargs; ++i)
      {
        rtx this_arg = operands[i];
        rtx this_slot;
  
        /* TFmode arguments and return values are passed by reference.  */
        if (GET_MODE (this_arg) == TFmode)
  	{
  	  int force_stack_temp;
  
  	  force_stack_temp = 0;
  	  if (TARGET_BUGGY_QP_LIB && i == 0)
  	    force_stack_temp = 1;
  
  	  if (GET_CODE (this_arg) == MEM
  	      && ! force_stack_temp)
  	    {
  	      tree expr = MEM_EXPR (this_arg);
  	      if (expr)
  		mark_addressable (expr);
  	      this_arg = XEXP (this_arg, 0);
  	    }
  	  else if (CONSTANT_P (this_arg)
  		   && ! force_stack_temp)
  	    {
  	      this_slot = force_const_mem (TFmode, this_arg);
  	      this_arg = XEXP (this_slot, 0);
  	    }
  	  else
  	    {
  	      this_slot = assign_stack_temp (TFmode, GET_MODE_SIZE (TFmode), 0);
  
  	      /* Operand 0 is the return value.  We'll copy it out later.  */
  	      if (i > 0)
  		emit_move_insn (this_slot, this_arg);
  	      else
  		ret_slot = this_slot;
  
  	      this_arg = XEXP (this_slot, 0);
  	    }
  	}
  
        arg[i] = this_arg;
      }
  
    func_sym = gen_rtx_SYMBOL_REF (Pmode, func_name);
  
    if (GET_MODE (operands[0]) == TFmode)
      {
        if (nargs == 2)
  	emit_library_call (func_sym, LCT_NORMAL, VOIDmode, 2,
  			   arg[0], GET_MODE (arg[0]),
  			   arg[1], GET_MODE (arg[1]));
        else
  	emit_library_call (func_sym, LCT_NORMAL, VOIDmode, 3,
  			   arg[0], GET_MODE (arg[0]),
  			   arg[1], GET_MODE (arg[1]),
  			   arg[2], GET_MODE (arg[2]));
  
        if (ret_slot)
  	emit_move_insn (operands[0], ret_slot);
      }
    else
      {
        rtx ret;
  
        gcc_assert (nargs == 2);
  
        ret = emit_library_call_value (func_sym, operands[0], LCT_NORMAL,
  				     GET_MODE (operands[0]), 1,
  				     arg[1], GET_MODE (arg[1]));
  
        if (ret != operands[0])
  	emit_move_insn (operands[0], ret);
      }
  }
  
  /* Expand soft-float TFmode calls to sparc abi routines.  */
  
  static void
  emit_soft_tfmode_binop (enum rtx_code code, rtx *operands)
  {
    const char *func;
  
    switch (code)
      {
      case PLUS:
        func = "_Qp_add";
        break;
      case MINUS:
        func = "_Qp_sub";
        break;
      case MULT:
        func = "_Qp_mul";
        break;
      case DIV:
        func = "_Qp_div";
        break;
      default:
        gcc_unreachable ();
      }
  
    emit_soft_tfmode_libcall (func, 3, operands);
  }
  
  static void
  emit_soft_tfmode_unop (enum rtx_code code, rtx *operands)
  {
    const char *func;
  
    gcc_assert (code == SQRT);
    func = "_Qp_sqrt";
  
    emit_soft_tfmode_libcall (func, 2, operands);
  }
  
  static void
  emit_soft_tfmode_cvt (enum rtx_code code, rtx *operands)
  {
    const char *func;
  
    switch (code)
      {
      case FLOAT_EXTEND:
        switch (GET_MODE (operands[1]))
  	{
  	case SFmode:
  	  func = "_Qp_stoq";
  	  break;
  	case DFmode:
  	  func = "_Qp_dtoq";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      case FLOAT_TRUNCATE:
        switch (GET_MODE (operands[0]))
  	{
  	case SFmode:
  	  func = "_Qp_qtos";
  	  break;
  	case DFmode:
  	  func = "_Qp_qtod";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      case FLOAT:
        switch (GET_MODE (operands[1]))
  	{
  	case SImode:
  	  func = "_Qp_itoq";
  	  if (TARGET_ARCH64)
  	    operands[1] = gen_rtx_SIGN_EXTEND (DImode, operands[1]);
  	  break;
  	case DImode:
  	  func = "_Qp_xtoq";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      case UNSIGNED_FLOAT:
        switch (GET_MODE (operands[1]))
  	{
  	case SImode:
  	  func = "_Qp_uitoq";
  	  if (TARGET_ARCH64)
  	    operands[1] = gen_rtx_ZERO_EXTEND (DImode, operands[1]);
  	  break;
  	case DImode:
  	  func = "_Qp_uxtoq";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      case FIX:
        switch (GET_MODE (operands[0]))
  	{
  	case SImode:
  	  func = "_Qp_qtoi";
  	  break;
  	case DImode:
  	  func = "_Qp_qtox";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      case UNSIGNED_FIX:
        switch (GET_MODE (operands[0]))
  	{
  	case SImode:
  	  func = "_Qp_qtoui";
  	  break;
  	case DImode:
  	  func = "_Qp_qtoux";
  	  break;
  	default:
  	  gcc_unreachable ();
  	}
        break;
  
      default:
        gcc_unreachable ();
      }
  
    emit_soft_tfmode_libcall (func, 2, operands);
  }
  
  /* Expand a hard-float tfmode operation.  All arguments must be in
     registers.  */
  
  static void
  emit_hard_tfmode_operation (enum rtx_code code, rtx *operands)
  {
    rtx op, dest;
  
    if (GET_RTX_CLASS (code) == RTX_UNARY)
      {
        operands[1] = force_reg (GET_MODE (operands[1]), operands[1]);
        op = gen_rtx_fmt_e (code, GET_MODE (operands[0]), operands[1]);
      }
    else
      {
        operands[1] = force_reg (GET_MODE (operands[1]), operands[1]);
        operands[2] = force_reg (GET_MODE (operands[2]), operands[2]);
        op = gen_rtx_fmt_ee (code, GET_MODE (operands[0]),
  			   operands[1], operands[2]);
      }
  
    if (register_operand (operands[0], VOIDmode))
      dest = operands[0];
    else
      dest = gen_reg_rtx (GET_MODE (operands[0]));
  
    emit_insn (gen_rtx_SET (VOIDmode, dest, op));
  
    if (dest != operands[0])
      emit_move_insn (operands[0], dest);
  }
  
  void
  emit_tfmode_binop (enum rtx_code code, rtx *operands)
  {
    if (TARGET_HARD_QUAD)
      emit_hard_tfmode_operation (code, operands);
    else
      emit_soft_tfmode_binop (code, operands);
  }
  
  void
  emit_tfmode_unop (enum rtx_code code, rtx *operands)
  {
    if (TARGET_HARD_QUAD)
      emit_hard_tfmode_operation (code, operands);
    else
      emit_soft_tfmode_unop (code, operands);
  }
  
  void
  emit_tfmode_cvt (enum rtx_code code, rtx *operands)
  {
    if (TARGET_HARD_QUAD)
      emit_hard_tfmode_operation (code, operands);
    else
      emit_soft_tfmode_cvt (code, operands);
  }
  
  /* Return nonzero if a branch/jump/call instruction will be emitting
     nop into its delay slot.  */
  
  int
  empty_delay_slot (rtx insn)
  {
    rtx seq;
  
    /* If no previous instruction (should not happen), return true.  */
    if (PREV_INSN (insn) == NULL)
      return 1;
  
    seq = NEXT_INSN (PREV_INSN (insn));
    if (GET_CODE (PATTERN (seq)) == SEQUENCE)
      return 0;
  
    return 1;
  }
  
  /* Return nonzero if TRIAL can go into the call delay slot.  */
  
  int
  tls_call_delay (rtx trial)
  {
    rtx pat;
  
    /* Binutils allows
         call __tls_get_addr, %tgd_call (foo)
          add %l7, %o0, %o0, %tgd_add (foo)
       while Sun as/ld does not.  */
    if (TARGET_GNU_TLS || !TARGET_TLS)
      return 1;
  
    pat = PATTERN (trial);
  
    /* We must reject tgd_add{32|64}, i.e.
         (set (reg) (plus (reg) (unspec [(reg) (symbol_ref)] UNSPEC_TLSGD)))
       and tldm_add{32|64}, i.e.
         (set (reg) (plus (reg) (unspec [(reg) (symbol_ref)] UNSPEC_TLSLDM)))
       for Sun as/ld.  */
    if (GET_CODE (pat) == SET
        && GET_CODE (SET_SRC (pat)) == PLUS)
      {
        rtx unspec = XEXP (SET_SRC (pat), 1);
  
        if (GET_CODE (unspec) == UNSPEC
  	  && (XINT (unspec, 1) == UNSPEC_TLSGD
  	      || XINT (unspec, 1) == UNSPEC_TLSLDM))
  	return 0;
      }
  
    return 1;
  }
  
  /* Return nonzero if TRIAL, an insn, can be combined with a 'restore'
     instruction.  RETURN_P is true if the v9 variant 'return' is to be
     considered in the test too.
  
     TRIAL must be a SET whose destination is a REG appropriate for the
     'restore' instruction or, if RETURN_P is true, for the 'return'
     instruction.  */
  
  static int
  eligible_for_restore_insn (rtx trial, bool return_p)
  {
    rtx pat = PATTERN (trial);
    rtx src = SET_SRC (pat);
    bool src_is_freg = false;
    rtx src_reg;
  
    /* Since we now can do moves between float and integer registers when
       VIS3 is enabled, we have to catch this case.  We can allow such
       moves when doing a 'return' however.  */
    src_reg = src;
    if (GET_CODE (src_reg) == SUBREG)
      src_reg = SUBREG_REG (src_reg);
    if (GET_CODE (src_reg) == REG
        && SPARC_FP_REG_P (REGNO (src_reg)))
      src_is_freg = true;
  
    /* The 'restore src,%g0,dest' pattern for word mode and below.  */
    if (GET_MODE_CLASS (GET_MODE (src)) != MODE_FLOAT
        && arith_operand (src, GET_MODE (src))
        && ! src_is_freg)
      {
        if (TARGET_ARCH64)
          return GET_MODE_SIZE (GET_MODE (src)) <= GET_MODE_SIZE (DImode);
        else
          return GET_MODE_SIZE (GET_MODE (src)) <= GET_MODE_SIZE (SImode);
      }
  
    /* The 'restore src,%g0,dest' pattern for double-word mode.  */
    else if (GET_MODE_CLASS (GET_MODE (src)) != MODE_FLOAT
  	   && arith_double_operand (src, GET_MODE (src))
  	   && ! src_is_freg)
      return GET_MODE_SIZE (GET_MODE (src)) <= GET_MODE_SIZE (DImode);
  
    /* The 'restore src,%g0,dest' pattern for float if no FPU.  */
    else if (! TARGET_FPU && register_operand (src, SFmode))
      return 1;
  
    /* The 'restore src,%g0,dest' pattern for double if no FPU.  */
    else if (! TARGET_FPU && TARGET_ARCH64 && register_operand (src, DFmode))
      return 1;
  
    /* If we have the 'return' instruction, anything that does not use
       local or output registers and can go into a delay slot wins.  */
    else if (return_p
  	   && TARGET_V9
  	   && !epilogue_renumber (&pat, 1)
  	   && get_attr_in_uncond_branch_delay (trial)
  	       == IN_UNCOND_BRANCH_DELAY_TRUE)
      return 1;
  
    /* The 'restore src1,src2,dest' pattern for SImode.  */
    else if (GET_CODE (src) == PLUS
  	   && register_operand (XEXP (src, 0), SImode)
  	   && arith_operand (XEXP (src, 1), SImode))
      return 1;
  
    /* The 'restore src1,src2,dest' pattern for DImode.  */
    else if (GET_CODE (src) == PLUS
  	   && register_operand (XEXP (src, 0), DImode)
  	   && arith_double_operand (XEXP (src, 1), DImode))
      return 1;
  
    /* The 'restore src1,%lo(src2),dest' pattern.  */
    else if (GET_CODE (src) == LO_SUM
  	   && ! TARGET_CM_MEDMID
  	   && ((register_operand (XEXP (src, 0), SImode)
  	        && immediate_operand (XEXP (src, 1), SImode))
  	       || (TARGET_ARCH64
  		   && register_operand (XEXP (src, 0), DImode)
  		   && immediate_operand (XEXP (src, 1), DImode))))
      return 1;
  
    /* The 'restore src,src,dest' pattern.  */
    else if (GET_CODE (src) == ASHIFT
  	   && (register_operand (XEXP (src, 0), SImode)
  	       || register_operand (XEXP (src, 0), DImode))
  	   && XEXP (src, 1) == const1_rtx)
      return 1;
  
    return 0;
  }
  
  /* Return nonzero if TRIAL can go into the function return's delay slot.  */
  
  int
  eligible_for_return_delay (rtx trial)
  {
    int regno;
    rtx pat;
  
    if (GET_CODE (trial) != INSN)
      return 0;
  
    if (get_attr_length (trial) != 1)
      return 0;
  
    /* If the function uses __builtin_eh_return, the eh_return machinery
       occupies the delay slot.  */
    if (crtl->calls_eh_return)
      return 0;
  
    /* In the case of a leaf or flat function, anything can go into the slot.  */
    if (sparc_leaf_function_p || TARGET_FLAT)
      return
        get_attr_in_uncond_branch_delay (trial) == IN_UNCOND_BRANCH_DELAY_TRUE;
  
    pat = PATTERN (trial);
    if (GET_CODE (pat) == PARALLEL)
      {
        int i;
  
        if (! TARGET_V9)
  	return 0;
        for (i = XVECLEN (pat, 0) - 1; i >= 0; i--)
  	{
  	  rtx expr = XVECEXP (pat, 0, i);
  	  if (GET_CODE (expr) != SET)
  	    return 0;
  	  if (GET_CODE (SET_DEST (expr)) != REG)
  	    return 0;
  	  regno = REGNO (SET_DEST (expr));
  	  if (regno >= 8 && regno < 24)
  	    return 0;
  	}
        return !epilogue_renumber (&pat, 1)
  	&& (get_attr_in_uncond_branch_delay (trial)
  	    == IN_UNCOND_BRANCH_DELAY_TRUE);
      }
  
    if (GET_CODE (pat) != SET)
      return 0;
  
    if (GET_CODE (SET_DEST (pat)) != REG)
      return 0;
  
    regno = REGNO (SET_DEST (pat));
  
    /* Otherwise, only operations which can be done in tandem with
       a `restore' or `return' insn can go into the delay slot.  */
    if (regno >= 8 && regno < 24)
      return 0;
  
    /* If this instruction sets up floating point register and we have a return
       instruction, it can probably go in.  But restore will not work
       with FP_REGS.  */
    if (! SPARC_INT_REG_P (regno))
      return (TARGET_V9
  	    && !epilogue_renumber (&pat, 1)
  	    && get_attr_in_uncond_branch_delay (trial)
  	       == IN_UNCOND_BRANCH_DELAY_TRUE);
  
    return eligible_for_restore_insn (trial, true);
  }
  
  /* Return nonzero if TRIAL can go into the sibling call's delay slot.  */
  
  int
  eligible_for_sibcall_delay (rtx trial)
  {
    rtx pat;
  
    if (GET_CODE (trial) != INSN || GET_CODE (PATTERN (trial)) != SET)
      return 0;
  
    if (get_attr_length (trial) != 1)
      return 0;
  
    pat = PATTERN (trial);
  
    if (sparc_leaf_function_p || TARGET_FLAT)
      {
        /* If the tail call is done using the call instruction,
  	 we have to restore %o7 in the delay slot.  */
        if (LEAF_SIBCALL_SLOT_RESERVED_P)
  	return 0;
  
        /* %g1 is used to build the function address */
        if (reg_mentioned_p (gen_rtx_REG (Pmode, 1), pat))
  	return 0;
  
        return 1;
      }
  
    /* Otherwise, only operations which can be done in tandem with
       a `restore' insn can go into the delay slot.  */
    if (GET_CODE (SET_DEST (pat)) != REG
        || (REGNO (SET_DEST (pat)) >= 8 && REGNO (SET_DEST (pat)) < 24)
        || ! SPARC_INT_REG_P (REGNO (SET_DEST (pat))))
      return 0;
  
    /* If it mentions %o7, it can't go in, because sibcall will clobber it
       in most cases.  */
    if (reg_mentioned_p (gen_rtx_REG (Pmode, 15), pat))
      return 0;
  
    return eligible_for_restore_insn (trial, false);
  }
  
  /* Determine if it's legal to put X into the constant pool.  This
     is not possible if X contains the address of a symbol that is
     not constant (TLS) or not known at final link time (PIC).  */
  
  static bool
  sparc_cannot_force_const_mem (enum machine_mode mode, rtx x)
  {
    switch (GET_CODE (x))
      {
      case CONST_INT:
      case CONST_DOUBLE:
      case CONST_VECTOR:
        /* Accept all non-symbolic constants.  */
        return false;
  
      case LABEL_REF:
        /* Labels are OK iff we are non-PIC.  */
        return flag_pic != 0;
  
      case SYMBOL_REF:
        /* 'Naked' TLS symbol references are never OK,
  	 non-TLS symbols are OK iff we are non-PIC.  */
        if (SYMBOL_REF_TLS_MODEL (x))
  	return true;
        else
  	return flag_pic != 0;
  
      case CONST:
        return sparc_cannot_force_const_mem (mode, XEXP (x, 0));
      case PLUS:
      case MINUS:
        return sparc_cannot_force_const_mem (mode, XEXP (x, 0))
           || sparc_cannot_force_const_mem (mode, XEXP (x, 1));
      case UNSPEC:
        return true;
      default:
        gcc_unreachable ();
      }
  }
  
  /* Global Offset Table support.  */
  static GTY(()) rtx got_helper_rtx = NULL_RTX;
  static GTY(()) rtx global_offset_table_rtx = NULL_RTX;
  
  /* Return the SYMBOL_REF for the Global Offset Table.  */
  
  static GTY(()) rtx sparc_got_symbol = NULL_RTX;
  
  static rtx
  sparc_got (void)
  {
    if (!sparc_got_symbol)
      sparc_got_symbol = gen_rtx_SYMBOL_REF (Pmode, "_GLOBAL_OFFSET_TABLE_");
  
    return sparc_got_symbol;
  }
  
  /* Ensure that we are not using patterns that are not OK with PIC.  */
  
  int
  check_pic (int i)
  {
    rtx op;
  
    switch (flag_pic)
      {
      case 1:
        op = recog_data.operand[i];
        gcc_assert (GET_CODE (op) != SYMBOL_REF
  	  	  && (GET_CODE (op) != CONST
  		      || (GET_CODE (XEXP (op, 0)) == MINUS
  			  && XEXP (XEXP (op, 0), 0) == sparc_got ()
  			  && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST)));
      case 2:
      default:
        return 1;
      }
  }
  
  /* Return true if X is an address which needs a temporary register when
     reloaded while generating PIC code.  */
  
  int
  pic_address_needs_scratch (rtx x)
  {
    /* An address which is a symbolic plus a non SMALL_INT needs a temp reg.  */
    if (GET_CODE (x) == CONST && GET_CODE (XEXP (x, 0)) == PLUS
        && GET_CODE (XEXP (XEXP (x, 0), 0)) == SYMBOL_REF
        && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
        && ! SMALL_INT (XEXP (XEXP (x, 0), 1)))
      return 1;
  
    return 0;
  }
  
  /* Determine if a given RTX is a valid constant.  We already know this
     satisfies CONSTANT_P.  */
  
  static bool
  sparc_legitimate_constant_p (enum machine_mode mode, rtx x)
  {
    switch (GET_CODE (x))
      {
      case CONST:
      case SYMBOL_REF:
        if (sparc_tls_referenced_p (x))
  	return false;
        break;
  
      case CONST_DOUBLE:
        if (GET_MODE (x) == VOIDmode)
          return true;
  
        /* Floating point constants are generally not ok.
  	 The only exception is 0.0 and all-ones in VIS.  */
        if (TARGET_VIS
  	  && SCALAR_FLOAT_MODE_P (mode)
  	  && (const_zero_operand (x, mode)
  	      || const_all_ones_operand (x, mode)))
  	return true;
  
        return false;
  
      case CONST_VECTOR:
        /* Vector constants are generally not ok.
  	 The only exception is 0 or -1 in VIS.  */
        if (TARGET_VIS
  	  && (const_zero_operand (x, mode)
  	      || const_all_ones_operand (x, mode)))
  	return true;
  
        return false;
  
      default:
        break;
      }
  
    return true;
  }
  
  /* Determine if a given RTX is a valid constant address.  */
  
  bool
  constant_address_p (rtx x)
  {
    switch (GET_CODE (x))
      {
      case LABEL_REF:
      case CONST_INT:
      case HIGH:
        return true;
  
      case CONST:
        if (flag_pic && pic_address_needs_scratch (x))
  	return false;
        return sparc_legitimate_constant_p (Pmode, x);
  
      case SYMBOL_REF:
        return !flag_pic && sparc_legitimate_constant_p (Pmode, x);
  
      default:
        return false;
      }
  }
  
  /* Nonzero if the constant value X is a legitimate general operand
     when generating PIC code.  It is given that flag_pic is on and
     that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
  
  bool
  legitimate_pic_operand_p (rtx x)
  {
    if (pic_address_needs_scratch (x))
      return false;
    if (sparc_tls_referenced_p (x))
      return false;
    return true;
  }
  
  #define RTX_OK_FOR_OFFSET_P(X, MODE)			\
    (CONST_INT_P (X)					\
     && INTVAL (X) >= -0x1000				\
     && INTVAL (X) < (0x1000 - GET_MODE_SIZE (MODE)))
  
  #define RTX_OK_FOR_OLO10_P(X, MODE)			\
    (CONST_INT_P (X)					\
     && INTVAL (X) >= -0x1000				\
     && INTVAL (X) < (0xc00 - GET_MODE_SIZE (MODE)))
  
  /* Handle the TARGET_LEGITIMATE_ADDRESS_P target hook.
  
     On SPARC, the actual legitimate addresses must be REG+REG or REG+SMALLINT
     ordinarily.  This changes a bit when generating PIC.  */
  
  static bool
  sparc_legitimate_address_p (enum machine_mode mode, rtx addr, bool strict)
  {
    rtx rs1 = NULL, rs2 = NULL, imm1 = NULL;
  
    if (REG_P (addr) || GET_CODE (addr) == SUBREG)
      rs1 = addr;
    else if (GET_CODE (addr) == PLUS)
      {
        rs1 = XEXP (addr, 0);
        rs2 = XEXP (addr, 1);
  
        /* Canonicalize.  REG comes first, if there are no regs,
  	 LO_SUM comes first.  */
        if (!REG_P (rs1)
  	  && GET_CODE (rs1) != SUBREG
  	  && (REG_P (rs2)
  	      || GET_CODE (rs2) == SUBREG
  	      || (GET_CODE (rs2) == LO_SUM && GET_CODE (rs1) != LO_SUM)))
  	{
  	  rs1 = XEXP (addr, 1);
  	  rs2 = XEXP (addr, 0);
  	}
  
        if ((flag_pic == 1
  	   && rs1 == pic_offset_table_rtx
  	   && !REG_P (rs2)
  	   && GET_CODE (rs2) != SUBREG
  	   && GET_CODE (rs2) != LO_SUM
  	   && GET_CODE (rs2) != MEM
  	   && !(GET_CODE (rs2) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (rs2))
  	   && (! symbolic_operand (rs2, VOIDmode) || mode == Pmode)
  	   && (GET_CODE (rs2) != CONST_INT || SMALL_INT (rs2)))
  	  || ((REG_P (rs1)
  	       || GET_CODE (rs1) == SUBREG)
  	      && RTX_OK_FOR_OFFSET_P (rs2, mode)))
  	{
  	  imm1 = rs2;
  	  rs2 = NULL;
  	}
        else if ((REG_P (rs1) || GET_CODE (rs1) == SUBREG)
  	       && (REG_P (rs2) || GET_CODE (rs2) == SUBREG))
  	{
  	  /* We prohibit REG + REG for TFmode when there are no quad move insns
  	     and we consequently need to split.  We do this because REG+REG
  	     is not an offsettable address.  If we get the situation in reload
  	     where source and destination of a movtf pattern are both MEMs with
  	     REG+REG address, then only one of them gets converted to an
  	     offsettable address.  */
  	  if (mode == TFmode
  	      && ! (TARGET_ARCH64 && TARGET_HARD_QUAD))
  	    return 0;
  
  	  /* We prohibit REG + REG on ARCH32 if not optimizing for
  	     DFmode/DImode because then mem_min_alignment is likely to be zero
  	     after reload and the  forced split would lack a matching splitter
  	     pattern.  */
  	  if (TARGET_ARCH32 && !optimize
  	      && (mode == DFmode || mode == DImode))
  	    return 0;
  	}
        else if (USE_AS_OFFSETABLE_LO10
  	       && GET_CODE (rs1) == LO_SUM
  	       && TARGET_ARCH64
  	       && ! TARGET_CM_MEDMID
  	       && RTX_OK_FOR_OLO10_P (rs2, mode))
  	{
  	  rs2 = NULL;
  	  imm1 = XEXP (rs1, 1);
  	  rs1 = XEXP (rs1, 0);
  	  if (!CONSTANT_P (imm1)
  	      || (GET_CODE (rs1) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (rs1)))
  	    return 0;
  	}
      }
    else if (GET_CODE (addr) == LO_SUM)
      {
        rs1 = XEXP (addr, 0);
        imm1 = XEXP (addr, 1);
  
        if (!CONSTANT_P (imm1)
  	  || (GET_CODE (rs1) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (rs1)))
  	return 0;
  
        /* We can't allow TFmode in 32-bit mode, because an offset greater
  	 than the alignment (8) may cause the LO_SUM to overflow.  */
        if (mode == TFmode && TARGET_ARCH32)
  	return 0;
      }
    else if (GET_CODE (addr) == CONST_INT && SMALL_INT (addr))
      return 1;
    else
      return 0;
  
    if (GET_CODE (rs1) == SUBREG)
      rs1 = SUBREG_REG (rs1);
    if (!REG_P (rs1))
      return 0;
  
    if (rs2)
      {
        if (GET_CODE (rs2) == SUBREG)
  	rs2 = SUBREG_REG (rs2);
        if (!REG_P (rs2))
  	return 0;
      }
  
    if (strict)
      {
        if (!REGNO_OK_FOR_BASE_P (REGNO (rs1))
  	  || (rs2 && !REGNO_OK_FOR_BASE_P (REGNO (rs2))))
  	return 0;
      }
    else
      {
        if ((! SPARC_INT_REG_P (REGNO (rs1))
  	   && REGNO (rs1) != FRAME_POINTER_REGNUM
  	   && REGNO (rs1) < FIRST_PSEUDO_REGISTER)
  	  || (rs2
  	      && (! SPARC_INT_REG_P (REGNO (rs2))
  		  && REGNO (rs2) != FRAME_POINTER_REGNUM
  		  && REGNO (rs2) < FIRST_PSEUDO_REGISTER)))
  	return 0;
      }
    return 1;
  }
  
  /* Return the SYMBOL_REF for the tls_get_addr function.  */
  
  static GTY(()) rtx sparc_tls_symbol = NULL_RTX;
  
  static rtx
  sparc_tls_get_addr (void)
  {
    if (!sparc_tls_symbol)
      sparc_tls_symbol = gen_rtx_SYMBOL_REF (Pmode, "__tls_get_addr");
  
    return sparc_tls_symbol;
  }
  
  /* Return the Global Offset Table to be used in TLS mode.  */
  
  static rtx
  sparc_tls_got (void)
  {
    /* In PIC mode, this is just the PIC offset table.  */
    if (flag_pic)
      {
        crtl->uses_pic_offset_table = 1;
        return pic_offset_table_rtx;
      }
  
    /* In non-PIC mode, Sun as (unlike GNU as) emits PC-relative relocations for
       the GOT symbol with the 32-bit ABI, so we reload the GOT register.  */
    if (TARGET_SUN_TLS && TARGET_ARCH32)
      {
        load_got_register ();
        return global_offset_table_rtx;
      }
  
    /* In all other cases, we load a new pseudo with the GOT symbol.  */
    return copy_to_reg (sparc_got ());
  }
  
  /* Return true if X contains a thread-local symbol.  */
  
  static bool
  sparc_tls_referenced_p (rtx x)
  {
    if (!TARGET_HAVE_TLS)
      return false;
  
    if (GET_CODE (x) == CONST && GET_CODE (XEXP (x, 0)) == PLUS)
      x = XEXP (XEXP (x, 0), 0);
  
    if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x))
      return true;
  
    /* That's all we handle in sparc_legitimize_tls_address for now.  */
    return false;
  }
  
  /* ADDR contains a thread-local SYMBOL_REF.  Generate code to compute
     this (thread-local) address.  */
  
  static rtx
  sparc_legitimize_tls_address (rtx addr)
  {
    rtx temp1, temp2, temp3, ret, o0, got, insn;
  
    gcc_assert (can_create_pseudo_p ());
  
    if (GET_CODE (addr) == SYMBOL_REF)
      switch (SYMBOL_REF_TLS_MODEL (addr))
        {
        case TLS_MODEL_GLOBAL_DYNAMIC:
  	start_sequence ();
  	temp1 = gen_reg_rtx (SImode);
  	temp2 = gen_reg_rtx (SImode);
  	ret = gen_reg_rtx (Pmode);
  	o0 = gen_rtx_REG (Pmode, 8);
  	got = sparc_tls_got ();
  	emit_insn (gen_tgd_hi22 (temp1, addr));
  	emit_insn (gen_tgd_lo10 (temp2, temp1, addr));
  	if (TARGET_ARCH32)
  	  {
  	    emit_insn (gen_tgd_add32 (o0, got, temp2, addr));
  	    insn = emit_call_insn (gen_tgd_call32 (o0, sparc_tls_get_addr (),
  						   addr, const1_rtx));
  	  }
  	else
  	  {
  	    emit_insn (gen_tgd_add64 (o0, got, temp2, addr));
  	    insn = emit_call_insn (gen_tgd_call64 (o0, sparc_tls_get_addr (),
  						   addr, const1_rtx));
  	  }
  	use_reg (&CALL_INSN_FUNCTION_USAGE (insn), o0);
  	insn = get_insns ();
  	end_sequence ();
  	emit_libcall_block (insn, ret, o0, addr);
  	break;
  
        case TLS_MODEL_LOCAL_DYNAMIC:
  	start_sequence ();
  	temp1 = gen_reg_rtx (SImode);
  	temp2 = gen_reg_rtx (SImode);
  	temp3 = gen_reg_rtx (Pmode);
  	ret = gen_reg_rtx (Pmode);
  	o0 = gen_rtx_REG (Pmode, 8);
  	got = sparc_tls_got ();
  	emit_insn (gen_tldm_hi22 (temp1));
  	emit_insn (gen_tldm_lo10 (temp2, temp1));
  	if (TARGET_ARCH32)
  	  {
  	    emit_insn (gen_tldm_add32 (o0, got, temp2));
  	    insn = emit_call_insn (gen_tldm_call32 (o0, sparc_tls_get_addr (),
  						    const1_rtx));
  	  }
  	else
  	  {
  	    emit_insn (gen_tldm_add64 (o0, got, temp2));
  	    insn = emit_call_insn (gen_tldm_call64 (o0, sparc_tls_get_addr (),
  						    const1_rtx));
  	  }
  	use_reg (&CALL_INSN_FUNCTION_USAGE (insn), o0);
  	insn = get_insns ();
  	end_sequence ();
  	emit_libcall_block (insn, temp3, o0,
  			    gen_rtx_UNSPEC (Pmode, gen_rtvec (1, const0_rtx),
  					    UNSPEC_TLSLD_BASE));
  	temp1 = gen_reg_rtx (SImode);
  	temp2 = gen_reg_rtx (SImode);
  	emit_insn (gen_tldo_hix22 (temp1, addr));
  	emit_insn (gen_tldo_lox10 (temp2, temp1, addr));
  	if (TARGET_ARCH32)
  	  emit_insn (gen_tldo_add32 (ret, temp3, temp2, addr));
  	else
  	  emit_insn (gen_tldo_add64 (ret, temp3, temp2, addr));
  	break;
  
        case TLS_MODEL_INITIAL_EXEC:
  	temp1 = gen_reg_rtx (SImode);
  	temp2 = gen_reg_rtx (SImode);
  	temp3 = gen_reg_rtx (Pmode);
  	got = sparc_tls_got ();
  	emit_insn (gen_tie_hi22 (temp1, addr));
  	emit_insn (gen_tie_lo10 (temp2, temp1, addr));
  	if (TARGET_ARCH32)
  	  emit_insn (gen_tie_ld32 (temp3, got, temp2, addr));
  	else
  	  emit_insn (gen_tie_ld64 (temp3, got, temp2, addr));
          if (TARGET_SUN_TLS)
  	  {
  	    ret = gen_reg_rtx (Pmode);
  	    if (TARGET_ARCH32)
  	      emit_insn (gen_tie_add32 (ret, gen_rtx_REG (Pmode, 7),
  					temp3, addr));
  	    else
  	      emit_insn (gen_tie_add64 (ret, gen_rtx_REG (Pmode, 7),
  					temp3, addr));
  	  }
  	else
  	  ret = gen_rtx_PLUS (Pmode, gen_rtx_REG (Pmode, 7), temp3);
  	break;
  
        case TLS_MODEL_LOCAL_EXEC:
  	temp1 = gen_reg_rtx (Pmode);
  	temp2 = gen_reg_rtx (Pmode);
  	if (TARGET_ARCH32)
  	  {
  	    emit_insn (gen_tle_hix22_sp32 (temp1, addr));
  	    emit_insn (gen_tle_lox10_sp32 (temp2, temp1, addr));
  	  }
  	else
  	  {
  	    emit_insn (gen_tle_hix22_sp64 (temp1, addr));
  	    emit_insn (gen_tle_lox10_sp64 (temp2, temp1, addr));
  	  }
  	ret = gen_rtx_PLUS (Pmode, gen_rtx_REG (Pmode, 7), temp2);
  	break;
  
        default:
  	gcc_unreachable ();
        }
  
    else if (GET_CODE (addr) == CONST)
      {
        rtx base, offset;
  
        gcc_assert (GET_CODE (XEXP (addr, 0)) == PLUS);
  
        base = sparc_legitimize_tls_address (XEXP (XEXP (addr, 0), 0));
        offset = XEXP (XEXP (addr, 0), 1);
  
        base = force_operand (base, NULL_RTX);
        if (!(GET_CODE (offset) == CONST_INT && SMALL_INT (offset)))
  	offset = force_reg (Pmode, offset);
        ret = gen_rtx_PLUS (Pmode, base, offset);
      }
  
    else
      gcc_unreachable ();  /* for now ... */
  
    return ret;
  }
  
  /* Legitimize PIC addresses.  If the address is already position-independent,
     we return ORIG.  Newly generated position-independent addresses go into a
     reg.  This is REG if nonzero, otherwise we allocate register(s) as
     necessary.  */
  
  static rtx
  sparc_legitimize_pic_address (rtx orig, rtx reg)
  {
    bool gotdata_op = false;
  
    if (GET_CODE (orig) == SYMBOL_REF
        /* See the comment in sparc_expand_move.  */
        || (GET_CODE (orig) == LABEL_REF && !can_use_mov_pic_label_ref (orig)))
      {
        rtx pic_ref, address;
        rtx insn;
  
        if (reg == 0)
  	{
  	  gcc_assert (can_create_pseudo_p ());
  	  reg = gen_reg_rtx (Pmode);
  	}
  
        if (flag_pic == 2)
  	{
  	  /* If not during reload, allocate another temp reg here for loading
  	     in the address, so that these instructions can be optimized
  	     properly.  */
  	  rtx temp_reg = (! can_create_pseudo_p ()
  			  ? reg : gen_reg_rtx (Pmode));
  
  	  /* Must put the SYMBOL_REF inside an UNSPEC here so that cse
  	     won't get confused into thinking that these two instructions
  	     are loading in the true address of the symbol.  If in the
  	     future a PIC rtx exists, that should be used instead.  */
  	  if (TARGET_ARCH64)
  	    {
  	      emit_insn (gen_movdi_high_pic (temp_reg, orig));
  	      emit_insn (gen_movdi_lo_sum_pic (temp_reg, temp_reg, orig));
  	    }
  	  else
  	    {
  	      emit_insn (gen_movsi_high_pic (temp_reg, orig));
  	      emit_insn (gen_movsi_lo_sum_pic (temp_reg, temp_reg, orig));
  	    }
  	  address = temp_reg;
  	  gotdata_op = true;
  	}
        else
  	address = orig;
  
        crtl->uses_pic_offset_table = 1;
        if (gotdata_op)
  	{
  	  if (TARGET_ARCH64)
  	    insn = emit_insn (gen_movdi_pic_gotdata_op (reg,
  							pic_offset_table_rtx,
  							address, orig));
  	  else
  	    insn = emit_insn (gen_movsi_pic_gotdata_op (reg,
  							pic_offset_table_rtx,
  							address, orig));
  	}
        else
  	{
  	  pic_ref
  	    = gen_const_mem (Pmode,
  			     gen_rtx_PLUS (Pmode,
  					   pic_offset_table_rtx, address));
  	  insn = emit_move_insn (reg, pic_ref);
  	}
  
        /* Put a REG_EQUAL note on this insn, so that it can be optimized
  	 by loop.  */
        set_unique_reg_note (insn, REG_EQUAL, orig);
        return reg;
      }
    else if (GET_CODE (orig) == CONST)
      {
        rtx base, offset;
  
        if (GET_CODE (XEXP (orig, 0)) == PLUS
  	  && XEXP (XEXP (orig, 0), 0) == pic_offset_table_rtx)
  	return orig;
  
        if (reg == 0)
  	{
  	  gcc_assert (can_create_pseudo_p ());
  	  reg = gen_reg_rtx (Pmode);
  	}
  
        gcc_assert (GET_CODE (XEXP (orig, 0)) == PLUS);
        base = sparc_legitimize_pic_address (XEXP (XEXP (orig, 0), 0), reg);
        offset = sparc_legitimize_pic_address (XEXP (XEXP (orig, 0), 1),
  			 		     base == reg ? NULL_RTX : reg);
  
        if (GET_CODE (offset) == CONST_INT)
  	{
  	  if (SMALL_INT (offset))
  	    return plus_constant (base, INTVAL (offset));
  	  else if (can_create_pseudo_p ())
  	    offset = force_reg (Pmode, offset);
  	  else
  	    /* If we reach here, then something is seriously wrong.  */
  	    gcc_unreachable ();
  	}
        return gen_rtx_PLUS (Pmode, base, offset);
      }
    else if (GET_CODE (orig) == LABEL_REF)
      /* ??? We ought to be checking that the register is live instead, in case
         it is eliminated.  */
      crtl->uses_pic_offset_table = 1;
  
    return orig;
  }
  
  /* Try machine-dependent ways of modifying an illegitimate address X
     to be legitimate.  If we find one, return the new, valid address.
  
     OLDX is the address as it was before break_out_memory_refs was called.
     In some cases it is useful to look at this to decide what needs to be done.
  
     MODE is the mode of the operand pointed to by X.
  
     On SPARC, change REG+N into REG+REG, and REG+(X*Y) into REG+REG.  */
  
  static rtx
  sparc_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
  			  enum machine_mode mode)
  {
    rtx orig_x = x;
  
    if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 0)) == MULT)
      x = gen_rtx_PLUS (Pmode, XEXP (x, 1),
  		      force_operand (XEXP (x, 0), NULL_RTX));
    if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 1)) == MULT)
      x = gen_rtx_PLUS (Pmode, XEXP (x, 0),
  		      force_operand (XEXP (x, 1), NULL_RTX));
    if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 0)) == PLUS)
      x = gen_rtx_PLUS (Pmode, force_operand (XEXP (x, 0), NULL_RTX),
  		      XEXP (x, 1));
    if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 1)) == PLUS)
      x = gen_rtx_PLUS (Pmode, XEXP (x, 0),
  		      force_operand (XEXP (x, 1), NULL_RTX));
  
    if (x != orig_x && sparc_legitimate_address_p (mode, x, FALSE))
      return x;
  
    if (sparc_tls_referenced_p (x))
      x = sparc_legitimize_tls_address (x);
    else if (flag_pic)
      x = sparc_legitimize_pic_address (x, NULL_RTX);
    else if (GET_CODE (x) == PLUS && CONSTANT_ADDRESS_P (XEXP (x, 1)))
      x = gen_rtx_PLUS (Pmode, XEXP (x, 0),
  		      copy_to_mode_reg (Pmode, XEXP (x, 1)));
    else if (GET_CODE (x) == PLUS && CONSTANT_ADDRESS_P (XEXP (x, 0)))
      x = gen_rtx_PLUS (Pmode, XEXP (x, 1),
  		      copy_to_mode_reg (Pmode, XEXP (x, 0)));
    else if (GET_CODE (x) == SYMBOL_REF
  	   || GET_CODE (x) == CONST
  	   || GET_CODE (x) == LABEL_REF)
      x = copy_to_suggested_reg (x, NULL_RTX, Pmode);
  
    return x;
  }
  
  /* Delegitimize an address that was legitimized by the above function.  */
  
  static rtx
  sparc_delegitimize_address (rtx x)
  {
    x = delegitimize_mem_from_attrs (x);
  
    if (GET_CODE (x) == LO_SUM && GET_CODE (XEXP (x, 1)) == UNSPEC)
      switch (XINT (XEXP (x, 1), 1))
        {
        case UNSPEC_MOVE_PIC:
        case UNSPEC_TLSLE:
  	x = XVECEXP (XEXP (x, 1), 0, 0);
  	gcc_assert (GET_CODE (x) == SYMBOL_REF);
  	break;
        default:
  	break;
        }
  
    /* This is generated by mov{si,di}_pic_label_ref in PIC mode.  */
    if (GET_CODE (x) == MINUS
        && REG_P (XEXP (x, 0))
        && REGNO (XEXP (x, 0)) == PIC_OFFSET_TABLE_REGNUM
        && GET_CODE (XEXP (x, 1)) == LO_SUM
        && GET_CODE (XEXP (XEXP (x, 1), 1)) == UNSPEC
        && XINT (XEXP (XEXP (x, 1), 1), 1) == UNSPEC_MOVE_PIC_LABEL)
      {
        x = XVECEXP (XEXP (XEXP (x, 1), 1), 0, 0);
        gcc_assert (GET_CODE (x) == LABEL_REF);
      }
  
    return x;
  }
  
  /* SPARC implementation of LEGITIMIZE_RELOAD_ADDRESS.  Returns a value to
     replace the input X, or the original X if no replacement is called for.
     The output parameter *WIN is 1 if the calling macro should goto WIN,
     0 if it should not.
  
     For SPARC, we wish to handle addresses by splitting them into
     HIGH+LO_SUM pairs, retaining the LO_SUM in the memory reference.
     This cuts the number of extra insns by one.
  
     Do nothing when generating PIC code and the address is a symbolic
     operand or requires a scratch register.  */
  
  rtx
  sparc_legitimize_reload_address (rtx x, enum machine_mode mode,
  				 int opnum, int type,
  				 int ind_levels ATTRIBUTE_UNUSED, int *win)
  {
    /* Decompose SImode constants into HIGH+LO_SUM.  */
    if (CONSTANT_P (x)
        && (mode != TFmode || TARGET_ARCH64)
        && GET_MODE (x) == SImode
        && GET_CODE (x) != LO_SUM
        && GET_CODE (x) != HIGH
        && sparc_cmodel <= CM_MEDLOW
        && !(flag_pic
  	   && (symbolic_operand (x, Pmode) || pic_address_needs_scratch (x))))
      {
        x = gen_rtx_LO_SUM (GET_MODE (x), gen_rtx_HIGH (GET_MODE (x), x), x);
        push_reload (XEXP (x, 0), NULL_RTX, &XEXP (x, 0), NULL,
  		   BASE_REG_CLASS, GET_MODE (x), VOIDmode, 0, 0,
  		   opnum, (enum reload_type)type);
        *win = 1;
        return x;
      }
  
    /* We have to recognize what we have already generated above.  */
    if (GET_CODE (x) == LO_SUM && GET_CODE (XEXP (x, 0)) == HIGH)
      {
        push_reload (XEXP (x, 0), NULL_RTX, &XEXP (x, 0), NULL,
  		   BASE_REG_CLASS, GET_MODE (x), VOIDmode, 0, 0,
  		   opnum, (enum reload_type)type);
        *win = 1;
        return x;
      }
  
    *win = 0;
    return x;
  }
  
  /* Return true if ADDR (a legitimate address expression)
     has an effect that depends on the machine mode it is used for.
  
     In PIC mode,
  
        (mem:HI [%l7+a])
  
     is not equivalent to
  
        (mem:QI [%l7+a]) (mem:QI [%l7+a+1])
  
     because [%l7+a+1] is interpreted as the address of (a+1).  */
  
  
  static bool
  sparc_mode_dependent_address_p (const_rtx addr)
  {
    if (flag_pic && GET_CODE (addr) == PLUS)
      {
        rtx op0 = XEXP (addr, 0);
        rtx op1 = XEXP (addr, 1);
        if (op0 == pic_offset_table_rtx
  	  && symbolic_operand (op1, VOIDmode))
  	return true;
      }
  
    return false;
  }
  
  #ifdef HAVE_GAS_HIDDEN
  # define USE_HIDDEN_LINKONCE 1
  #else
  # define USE_HIDDEN_LINKONCE 0
  #endif
  
  static void
  get_pc_thunk_name (char name[32], unsigned int regno)
  {
    const char *reg_name = reg_names[regno];
  
    /* Skip the leading '%' as that cannot be used in a
       symbol name.  */
    reg_name += 1;
  
    if (USE_HIDDEN_LINKONCE)
      sprintf (name, "__sparc_get_pc_thunk.%s", reg_name);
    else
      ASM_GENERATE_INTERNAL_LABEL (name, "LADDPC", regno);
  }
  
  /* Wrapper around the load_pcrel_sym{si,di} patterns.  */
  
  static rtx
  gen_load_pcrel_sym (rtx op0, rtx op1, rtx op2, rtx op3)
  {
    int orig_flag_pic = flag_pic;
    rtx insn;
  
    /* The load_pcrel_sym{si,di} patterns require absolute addressing.  */
    flag_pic = 0;
    if (TARGET_ARCH64)
      insn = gen_load_pcrel_symdi (op0, op1, op2, op3);
    else
      insn = gen_load_pcrel_symsi (op0, op1, op2, op3);
    flag_pic = orig_flag_pic;
  
    return insn;
  }
  
  /* Emit code to load the GOT register.  */
  
  void
  load_got_register (void)
  {
    /* In PIC mode, this will retrieve pic_offset_table_rtx.  */
    if (!global_offset_table_rtx)
      global_offset_table_rtx = gen_rtx_REG (Pmode, GLOBAL_OFFSET_TABLE_REGNUM);
  
    if (TARGET_VXWORKS_RTP)
      emit_insn (gen_vxworks_load_got ());
    else
      {
        /* The GOT symbol is subject to a PC-relative relocation so we need a
  	 helper function to add the PC value and thus get the final value.  */
        if (!got_helper_rtx)
  	{
  	  char name[32];
  	  get_pc_thunk_name (name, GLOBAL_OFFSET_TABLE_REGNUM);
  	  got_helper_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (name));
  	}
  
        emit_insn (gen_load_pcrel_sym (global_offset_table_rtx, sparc_got (),
  				     got_helper_rtx,
  				     GEN_INT (GLOBAL_OFFSET_TABLE_REGNUM)));
      }
  
    /* Need to emit this whether or not we obey regdecls,
       since setjmp/longjmp can cause life info to screw up.
       ??? In the case where we don't obey regdecls, this is not sufficient
       since we may not fall out the bottom.  */
    emit_use (global_offset_table_rtx);
  }
  
  /* Emit a call instruction with the pattern given by PAT.  ADDR is the
     address of the call target.  */
  
  void
  sparc_emit_call_insn (rtx pat, rtx addr)
  {
    rtx insn;
  
    insn = emit_call_insn (pat);
  
    /* The PIC register is live on entry to VxWorks PIC PLT entries.  */
    if (TARGET_VXWORKS_RTP
        && flag_pic
        && GET_CODE (addr) == SYMBOL_REF
        && (SYMBOL_REF_DECL (addr)
  	  ? !targetm.binds_local_p (SYMBOL_REF_DECL (addr))
  	  : !SYMBOL_REF_LOCAL_P (addr)))
      {
        use_reg (&CALL_INSN_FUNCTION_USAGE (insn), pic_offset_table_rtx);
        crtl->uses_pic_offset_table = 1;
      }
  }
  
  /* Return 1 if RTX is a MEM which is known to be aligned to at
     least a DESIRED byte boundary.  */
  
  int
  mem_min_alignment (rtx mem, int desired)
  {
    rtx addr, base, offset;
  
    /* If it's not a MEM we can't accept it.  */
    if (GET_CODE (mem) != MEM)
      return 0;
  
    /* Obviously...  */
    if (!TARGET_UNALIGNED_DOUBLES
        && MEM_ALIGN (mem) / BITS_PER_UNIT >= (unsigned)desired)
      return 1;
  
    /* ??? The rest of the function predates MEM_ALIGN so
       there is probably a bit of redundancy.  */
    addr = XEXP (mem, 0);
    base = offset = NULL_RTX;
    if (GET_CODE (addr) == PLUS)
      {
        if (GET_CODE (XEXP (addr, 0)) == REG)
  	{
  	  base = XEXP (addr, 0);
  
  	  /* What we are saying here is that if the base
  	     REG is aligned properly, the compiler will make
  	     sure any REG based index upon it will be so
  	     as well.  */
  	  if (GET_CODE (XEXP (addr, 1)) == CONST_INT)
  	    offset = XEXP (addr, 1);
  	  else
  	    offset = const0_rtx;
  	}
      }
    else if (GET_CODE (addr) == REG)
      {
        base = addr;
        offset = const0_rtx;
      }
  
    if (base != NULL_RTX)
      {
        int regno = REGNO (base);
  
        if (regno != HARD_FRAME_POINTER_REGNUM && regno != STACK_POINTER_REGNUM)
  	{
  	  /* Check if the compiler has recorded some information
  	     about the alignment of the base REG.  If reload has
  	     completed, we already matched with proper alignments.
  	     If not running global_alloc, reload might give us
  	     unaligned pointer to local stack though.  */
  	  if (((cfun != 0
  		&& REGNO_POINTER_ALIGN (regno) >= desired * BITS_PER_UNIT)
  	       || (optimize && reload_completed))
  	      && (INTVAL (offset) & (desired - 1)) == 0)
  	    return 1;
  	}
        else
  	{
  	  if (((INTVAL (offset) - SPARC_STACK_BIAS) & (desired - 1)) == 0)
  	    return 1;
  	}
      }
    else if (! TARGET_UNALIGNED_DOUBLES
  	   || CONSTANT_P (addr)
  	   || GET_CODE (addr) == LO_SUM)
      {
        /* Anything else we know is properly aligned unless TARGET_UNALIGNED_DOUBLES
  	 is true, in which case we can only assume that an access is aligned if
  	 it is to a constant address, or the address involves a LO_SUM.  */
        return 1;
      }
  
    /* An obviously unaligned address.  */
    return 0;
  }
  
  
  /* Vectors to keep interesting information about registers where it can easily
     be got.  We used to use the actual mode value as the bit number, but there
     are more than 32 modes now.  Instead we use two tables: one indexed by
     hard register number, and one indexed by mode.  */
  
  /* The purpose of sparc_mode_class is to shrink the range of modes so that
     they all fit (as bit numbers) in a 32-bit word (again).  Each real mode is
     mapped into one sparc_mode_class mode.  */
  
  enum sparc_mode_class {
    S_MODE, D_MODE, T_MODE, O_MODE,
    SF_MODE, DF_MODE, TF_MODE, OF_MODE,
    CC_MODE, CCFP_MODE
  };
  
  /* Modes for single-word and smaller quantities.  */
  #define S_MODES ((1 << (int) S_MODE) | (1 << (int) SF_MODE))
  
  /* Modes for double-word and smaller quantities.  */
  #define D_MODES (S_MODES | (1 << (int) D_MODE) | (1 << DF_MODE))
  
  /* Modes for quad-word and smaller quantities.  */
  #define T_MODES (D_MODES | (1 << (int) T_MODE) | (1 << (int) TF_MODE))
  
  /* Modes for 8-word and smaller quantities.  */
  #define O_MODES (T_MODES | (1 << (int) O_MODE) | (1 << (int) OF_MODE))
  
  /* Modes for single-float quantities.  We must allow any single word or
     smaller quantity.  This is because the fix/float conversion instructions
     take integer inputs/outputs from the float registers.  */
  #define SF_MODES (S_MODES)
  
  /* Modes for double-float and smaller quantities.  */
  #define DF_MODES (D_MODES)
  
  /* Modes for quad-float and smaller quantities.  */
  #define TF_MODES (DF_MODES | (1 << (int) TF_MODE))
  
  /* Modes for quad-float pairs and smaller quantities.  */
  #define OF_MODES (TF_MODES | (1 << (int) OF_MODE))
  
  /* Modes for double-float only quantities.  */
  #define DF_MODES_NO_S ((1 << (int) D_MODE) | (1 << (int) DF_MODE))
  
  /* Modes for quad-float and double-float only quantities.  */
  #define TF_MODES_NO_S (DF_MODES_NO_S | (1 << (int) TF_MODE))
  
  /* Modes for quad-float pairs and double-float only quantities.  */
  #define OF_MODES_NO_S (TF_MODES_NO_S | (1 << (int) OF_MODE))
  
  /* Modes for condition codes.  */
  #define CC_MODES (1 << (int) CC_MODE)
  #define CCFP_MODES (1 << (int) CCFP_MODE)
  
  /* Value is 1 if register/mode pair is acceptable on sparc.
     The funny mixture of D and T modes is because integer operations
     do not specially operate on tetra quantities, so non-quad-aligned
     registers can hold quadword quantities (except %o4 and %i4 because
     they cross fixed registers).  */
  
  /* This points to either the 32 bit or the 64 bit version.  */
  const int *hard_regno_mode_classes;
  
  static const int hard_32bit_mode_classes[] = {
    S_MODES, S_MODES, T_MODES, S_MODES, T_MODES, S_MODES, D_MODES, S_MODES,
    T_MODES, S_MODES, T_MODES, S_MODES, D_MODES, S_MODES, D_MODES, S_MODES,
    T_MODES, S_MODES, T_MODES, S_MODES, T_MODES, S_MODES, D_MODES, S_MODES,
    T_MODES, S_MODES, T_MODES, S_MODES, D_MODES, S_MODES, D_MODES, S_MODES,
  
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, TF_MODES, SF_MODES, DF_MODES, SF_MODES,
  
    /* FP regs f32 to f63.  Only the even numbered registers actually exist,
       and none can hold SFmode/SImode values.  */
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, TF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
  
    /* %fcc[0123] */
    CCFP_MODES, CCFP_MODES, CCFP_MODES, CCFP_MODES,
  
    /* %icc, %sfp, %gsr */
    CC_MODES, 0, D_MODES
  };
  
  static const int hard_64bit_mode_classes[] = {
    D_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES,
    O_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES,
    T_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES,
    O_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES, T_MODES, D_MODES,
  
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, OF_MODES, SF_MODES, DF_MODES, SF_MODES,
    OF_MODES, SF_MODES, DF_MODES, SF_MODES, TF_MODES, SF_MODES, DF_MODES, SF_MODES,
  
    /* FP regs f32 to f63.  Only the even numbered registers actually exist,
       and none can hold SFmode/SImode values.  */
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, OF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
    OF_MODES_NO_S, 0, DF_MODES_NO_S, 0, TF_MODES_NO_S, 0, DF_MODES_NO_S, 0,
  
    /* %fcc[0123] */
    CCFP_MODES, CCFP_MODES, CCFP_MODES, CCFP_MODES,
  
    /* %icc, %sfp, %gsr */
    CC_MODES, 0, D_MODES
  };
  
  int sparc_mode_class [NUM_MACHINE_MODES];
  
  enum reg_class sparc_regno_reg_class[FIRST_PSEUDO_REGISTER];
  
  static void
  sparc_init_modes (void)
  {
    int i;
  
    for (i = 0; i < NUM_MACHINE_MODES; i++)
      {
        switch (GET_MODE_CLASS (i))
  	{
  	case MODE_INT:
  	case MODE_PARTIAL_INT:
  	case MODE_COMPLEX_INT:
  	  if (GET_MODE_SIZE (i) <= 4)
  	    sparc_mode_class[i] = 1 << (int) S_MODE;
  	  else if (GET_MODE_SIZE (i) == 8)
  	    sparc_mode_class[i] = 1 << (int) D_MODE;
  	  else if (GET_MODE_SIZE (i) == 16)
  	    sparc_mode_class[i] = 1 << (int) T_MODE;
  	  else if (GET_MODE_SIZE (i) == 32)
  	    sparc_mode_class[i] = 1 << (int) O_MODE;
  	  else
  	    sparc_mode_class[i] = 0;
  	  break;
  	case MODE_VECTOR_INT:
  	  if (GET_MODE_SIZE (i) <= 4)
  	    sparc_mode_class[i] = 1 << (int)SF_MODE;
  	  else if (GET_MODE_SIZE (i) == 8)
  	    sparc_mode_class[i] = 1 << (int)DF_MODE;
  	  break;
  	case MODE_FLOAT:
  	case MODE_COMPLEX_FLOAT:
  	  if (GET_MODE_SIZE (i) <= 4)
  	    sparc_mode_class[i] = 1 << (int) SF_MODE;
  	  else if (GET_MODE_SIZE (i) == 8)
  	    sparc_mode_class[i] = 1 << (int) DF_MODE;
  	  else if (GET_MODE_SIZE (i) == 16)
  	    sparc_mode_class[i] = 1 << (int) TF_MODE;
  	  else if (GET_MODE_SIZE (i) == 32)
  	    sparc_mode_class[i] = 1 << (int) OF_MODE;
  	  else
  	    sparc_mode_class[i] = 0;
  	  break;
  	case MODE_CC:
  	  if (i == (int) CCFPmode || i == (int) CCFPEmode)
  	    sparc_mode_class[i] = 1 << (int) CCFP_MODE;
  	  else
  	    sparc_mode_class[i] = 1 << (int) CC_MODE;
  	  break;
  	default:
  	  sparc_mode_class[i] = 0;
  	  break;
  	}
      }
  
    if (TARGET_ARCH64)
      hard_regno_mode_classes = hard_64bit_mode_classes;
    else
      hard_regno_mode_classes = hard_32bit_mode_classes;
  
    /* Initialize the array used by REGNO_REG_CLASS.  */
    for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
      {
        if (i < 16 && TARGET_V8PLUS)
  	sparc_regno_reg_class[i] = I64_REGS;
        else if (i < 32 || i == FRAME_POINTER_REGNUM)
  	sparc_regno_reg_class[i] = GENERAL_REGS;
        else if (i < 64)
  	sparc_regno_reg_class[i] = FP_REGS;
        else if (i < 96)
  	sparc_regno_reg_class[i] = EXTRA_FP_REGS;
        else if (i < 100)
  	sparc_regno_reg_class[i] = FPCC_REGS;
        else
  	sparc_regno_reg_class[i] = NO_REGS;
      }
  }
  
  /* Return whether REGNO, a global or FP register, must be saved/restored.  */
  
  static inline bool
  save_global_or_fp_reg_p (unsigned int regno,
  			 int leaf_function ATTRIBUTE_UNUSED)
  {
    return !call_used_regs[regno] && df_regs_ever_live_p (regno);
  }
  
  /* Return whether the return address register (%i7) is needed.  */
  
  static inline bool
  return_addr_reg_needed_p (int leaf_function)
  {
    /* If it is live, for example because of __builtin_return_address (0).  */
    if (df_regs_ever_live_p (RETURN_ADDR_REGNUM))
      return true;
  
    /* Otherwise, it is needed as save register if %o7 is clobbered.  */
    if (!leaf_function
        /* Loading the GOT register clobbers %o7.  */
        || crtl->uses_pic_offset_table
        || df_regs_ever_live_p (INCOMING_RETURN_ADDR_REGNUM))
      return true;
  
    return false;
  }
  
  /* Return whether REGNO, a local or in register, must be saved/restored.  */
  
  static bool
  save_local_or_in_reg_p (unsigned int regno, int leaf_function)
  {
    /* General case: call-saved registers live at some point.  */
    if (!call_used_regs[regno] && df_regs_ever_live_p (regno))
      return true;
  
    /* Frame pointer register (%fp) if needed.  */
    if (regno == HARD_FRAME_POINTER_REGNUM && frame_pointer_needed)
      return true;
  
    /* Return address register (%i7) if needed.  */
    if (regno == RETURN_ADDR_REGNUM && return_addr_reg_needed_p (leaf_function))
      return true;
  
    /* GOT register (%l7) if needed.  */
    if (regno == PIC_OFFSET_TABLE_REGNUM && crtl->uses_pic_offset_table)
      return true;
  
    /* If the function accesses prior frames, the frame pointer and the return
       address of the previous frame must be saved on the stack.  */
    if (crtl->accesses_prior_frames
        && (regno == HARD_FRAME_POINTER_REGNUM || regno == RETURN_ADDR_REGNUM))
      return true;
  
    return false;
  }
  
  /* Compute the frame size required by the function.  This function is called
     during the reload pass and also by sparc_expand_prologue.  */
  
  HOST_WIDE_INT
  sparc_compute_frame_size (HOST_WIDE_INT size, int leaf_function)
  {
    HOST_WIDE_INT frame_size, apparent_frame_size;
    int args_size, n_global_fp_regs = 0;
    bool save_local_in_regs_p = false;
    unsigned int i;
  
    /* If the function allocates dynamic stack space, the dynamic offset is
       computed early and contains REG_PARM_STACK_SPACE, so we need to cope.  */
    if (leaf_function && !cfun->calls_alloca)
      args_size = 0;
    else
      args_size = crtl->outgoing_args_size + REG_PARM_STACK_SPACE (cfun->decl);
  
    /* Calculate space needed for global registers.  */
    if (TARGET_ARCH64)
      for (i = 0; i < 8; i++)
        if (save_global_or_fp_reg_p (i, 0))
  	n_global_fp_regs += 2;
    else
      for (i = 0; i < 8; i += 2)
        if (save_global_or_fp_reg_p (i, 0) || save_global_or_fp_reg_p (i + 1, 0))
  	n_global_fp_regs += 2;
  
    /* In the flat window model, find out which local and in registers need to
       be saved.  We don't reserve space in the current frame for them as they
       will be spilled into the register window save area of the caller's frame.
       However, as soon as we use this register window save area, we must create
       that of the current frame to make it the live one.  */
    if (TARGET_FLAT)
      for (i = 16; i < 32; i++)
        if (save_local_or_in_reg_p (i, leaf_function))
  	{
  	 save_local_in_regs_p = true;
  	 break;
  	}
  
    /* Calculate space needed for FP registers.  */
    for (i = 32; i < (TARGET_V9 ? 96 : 64); i += 2)
      if (save_global_or_fp_reg_p (i, 0) || save_global_or_fp_reg_p (i + 1, 0))
        n_global_fp_regs += 2;
  
    if (size == 0
        && n_global_fp_regs == 0
        && args_size == 0
        && !save_local_in_regs_p)
      frame_size = apparent_frame_size = 0;
    else
      {
        /* We subtract STARTING_FRAME_OFFSET, remember it's negative.  */
        apparent_frame_size = (size - STARTING_FRAME_OFFSET + 7) & -8;
        apparent_frame_size += n_global_fp_regs * 4;
  
        /* We need to add the size of the outgoing argument area.  */
        frame_size = apparent_frame_size + ((args_size + 7) & -8);
  
        /* And that of the register window save area.  */
        frame_size += FIRST_PARM_OFFSET (cfun->decl);
  
        /* Finally, bump to the appropriate alignment.  */
        frame_size = SPARC_STACK_ALIGN (frame_size);
      }
  
    /* Set up values for use in prologue and epilogue.  */
    sparc_frame_size = frame_size;
    sparc_apparent_frame_size = apparent_frame_size;
    sparc_n_global_fp_regs = n_global_fp_regs;
    sparc_save_local_in_regs_p = save_local_in_regs_p;
  
    return frame_size;
  }
  
  /* Output any necessary .register pseudo-ops.  */
  
  void
  sparc_output_scratch_registers (FILE *file ATTRIBUTE_UNUSED)
  {
  #ifdef HAVE_AS_REGISTER_PSEUDO_OP
    int i;
  
    if (TARGET_ARCH32)
      return;
  
    /* Check if %g[2367] were used without
       .register being printed for them already.  */
    for (i = 2; i < 8; i++)
      {
        if (df_regs_ever_live_p (i)
  	  && ! sparc_hard_reg_printed [i])
  	{
  	  sparc_hard_reg_printed [i] = 1;
  	  /* %g7 is used as TLS base register, use #ignore
  	     for it instead of #scratch.  */
  	  fprintf (file, "\t.register\t%%g%d, #%s\n", i,
  		   i == 7 ? "ignore" : "scratch");
  	}
        if (i == 3) i = 5;
      }
  #endif
  }
  
  #define PROBE_INTERVAL (1 << STACK_CHECK_PROBE_INTERVAL_EXP)
  
  #if PROBE_INTERVAL > 4096
  #error Cannot use indexed addressing mode for stack probing
  #endif
  
  /* Emit code to probe a range of stack addresses from FIRST to FIRST+SIZE,
     inclusive.  These are offsets from the current stack pointer.
  
     Note that we don't use the REG+REG addressing mode for the probes because
     of the stack bias in 64-bit mode.  And it doesn't really buy us anything
     so the advantages of having a single code win here.  */
  
  static void
  sparc_emit_probe_stack_range (HOST_WIDE_INT first, HOST_WIDE_INT size)
  {
    rtx g1 = gen_rtx_REG (Pmode, 1);
  
    /* See if we have a constant small number of probes to generate.  If so,
       that's the easy case.  */
    if (size <= PROBE_INTERVAL)
      {
        emit_move_insn (g1, GEN_INT (first));
        emit_insn (gen_rtx_SET (VOIDmode, g1,
  			      gen_rtx_MINUS (Pmode, stack_pointer_rtx, g1)));
        emit_stack_probe (plus_constant (g1, -size));
      }
  
    /* The run-time loop is made up of 10 insns in the generic case while the
       compile-time loop is made up of 4+2*(n-2) insns for n # of intervals.  */
    else if (size <= 5 * PROBE_INTERVAL)
      {
        HOST_WIDE_INT i;
  
        emit_move_insn (g1, GEN_INT (first + PROBE_INTERVAL));
        emit_insn (gen_rtx_SET (VOIDmode, g1,
  			      gen_rtx_MINUS (Pmode, stack_pointer_rtx, g1)));
        emit_stack_probe (g1);
  
        /* Probe at FIRST + N * PROBE_INTERVAL for values of N from 2 until
  	 it exceeds SIZE.  If only two probes are needed, this will not
  	 generate any code.  Then probe at FIRST + SIZE.  */
        for (i = 2 * PROBE_INTERVAL; i < size; i += PROBE_INTERVAL)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode, g1,
  				  plus_constant (g1, -PROBE_INTERVAL)));
  	  emit_stack_probe (g1);
  	}
  
        emit_stack_probe (plus_constant (g1, (i - PROBE_INTERVAL) - size));
      }
  
    /* Otherwise, do the same as above, but in a loop.  Note that we must be
       extra careful with variables wrapping around because we might be at
       the very top (or the very bottom) of the address space and we have
       to be able to handle this case properly; in particular, we use an
       equality test for the loop condition.  */
    else
      {
        HOST_WIDE_INT rounded_size;
        rtx g4 = gen_rtx_REG (Pmode, 4);
  
        emit_move_insn (g1, GEN_INT (first));
  
  
        /* Step 1: round SIZE to the previous multiple of the interval.  */
  
        rounded_size = size & -PROBE_INTERVAL;
        emit_move_insn (g4, GEN_INT (rounded_size));
  
  
        /* Step 2: compute initial and final value of the loop counter.  */
  
        /* TEST_ADDR = SP + FIRST.  */
        emit_insn (gen_rtx_SET (VOIDmode, g1,
  			      gen_rtx_MINUS (Pmode, stack_pointer_rtx, g1)));
  
        /* LAST_ADDR = SP + FIRST + ROUNDED_SIZE.  */
        emit_insn (gen_rtx_SET (VOIDmode, g4, gen_rtx_MINUS (Pmode, g1, g4)));
  
  
        /* Step 3: the loop
  
  	 while (TEST_ADDR != LAST_ADDR)
  	   {
  	     TEST_ADDR = TEST_ADDR + PROBE_INTERVAL
  	     probe at TEST_ADDR
  	   }
  
  	 probes at FIRST + N * PROBE_INTERVAL for values of N from 1
  	 until it is equal to ROUNDED_SIZE.  */
  
        if (TARGET_64BIT)
  	emit_insn (gen_probe_stack_rangedi (g1, g1, g4));
        else
  	emit_insn (gen_probe_stack_rangesi (g1, g1, g4));
  
  
        /* Step 4: probe at FIRST + SIZE if we cannot assert at compile-time
  	 that SIZE is equal to ROUNDED_SIZE.  */
  
        if (size != rounded_size)
  	emit_stack_probe (plus_constant (g4, rounded_size - size));
      }
  
    /* Make sure nothing is scheduled before we are done.  */
    emit_insn (gen_blockage ());
  }
  
  /* Probe a range of stack addresses from REG1 to REG2 inclusive.  These are
     absolute addresses.  */
  
  const char *
  output_probe_stack_range (rtx reg1, rtx reg2)
  {
    static int labelno = 0;
    char loop_lab[32], end_lab[32];
    rtx xops[2];
  
    ASM_GENERATE_INTERNAL_LABEL (loop_lab, "LPSRL", labelno);
    ASM_GENERATE_INTERNAL_LABEL (end_lab, "LPSRE", labelno++);
  
    ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, loop_lab);
  
     /* Jump to END_LAB if TEST_ADDR == LAST_ADDR.  */
    xops[0] = reg1;
    xops[1] = reg2;
    output_asm_insn ("cmp\t%0, %1", xops);
    if (TARGET_ARCH64)
      fputs ("\tbe,pn\t%xcc,", asm_out_file);
    else
      fputs ("\tbe\t", asm_out_file);
    assemble_name_raw (asm_out_file, end_lab);
    fputc ('\n', asm_out_file);
  
    /* TEST_ADDR = TEST_ADDR + PROBE_INTERVAL.  */
    xops[1] = GEN_INT (-PROBE_INTERVAL);
    output_asm_insn (" add\t%0, %1, %0", xops);
  
    /* Probe at TEST_ADDR and branch.  */
    if (TARGET_ARCH64)
      fputs ("\tba,pt\t%xcc,", asm_out_file);
    else
      fputs ("\tba\t", asm_out_file);
    assemble_name_raw (asm_out_file, loop_lab);
    fputc ('\n', asm_out_file);
    xops[1] = GEN_INT (SPARC_STACK_BIAS);
    output_asm_insn (" st\t%%g0, [%0+%1]", xops);
  
    ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, end_lab);
  
    return "";
  }
  
  /* Emit code to save/restore registers from LOW to HIGH at BASE+OFFSET as
     needed.  LOW is supposed to be double-word aligned for 32-bit registers.
     SAVE_P decides whether a register must be saved/restored.  ACTION_TRUE
     is the action to be performed if SAVE_P returns true and ACTION_FALSE
     the action to be performed if it returns false.  Return the new offset.  */
  
  typedef bool (*sorr_pred_t) (unsigned int, int);
  typedef enum { SORR_NONE, SORR_ADVANCE, SORR_SAVE, SORR_RESTORE } sorr_act_t;
  
  static int
  emit_save_or_restore_regs (unsigned int low, unsigned int high, rtx base,
  			   int offset, int leaf_function, sorr_pred_t save_p,
  			   sorr_act_t action_true, sorr_act_t action_false)
  {
    unsigned int i;
    rtx mem, insn;
  
    if (TARGET_ARCH64 && high <= 32)
      {
        int fp_offset = -1;
  
        for (i = low; i < high; i++)
  	{
  	  if (save_p (i, leaf_function))
  	    {
  	      mem = gen_frame_mem (DImode, plus_constant (base, offset));
  	      if (action_true == SORR_SAVE)
  		{
  		  insn = emit_move_insn (mem, gen_rtx_REG (DImode, i));
  		  RTX_FRAME_RELATED_P (insn) = 1;
  		}
  	      else  /* action_true == SORR_RESTORE */
  		{
  		  /* The frame pointer must be restored last since its old
  		     value may be used as base address for the frame.  This
  		     is problematic in 64-bit mode only because of the lack
  		     of double-word load instruction.  */
  		  if (i == HARD_FRAME_POINTER_REGNUM)
  		    fp_offset = offset;
  		  else
  		    emit_move_insn (gen_rtx_REG (DImode, i), mem);
  		}
  	      offset += 8;
  	    }
  	  else if (action_false == SORR_ADVANCE)
  	    offset += 8;
  	}
  
        if (fp_offset >= 0)
  	{
  	  mem = gen_frame_mem (DImode, plus_constant (base, fp_offset));
  	  emit_move_insn (hard_frame_pointer_rtx, mem);
  	}
      }
    else
      {
        for (i = low; i < high; i += 2)
  	{
  	  bool reg0 = save_p (i, leaf_function);
  	  bool reg1 = save_p (i + 1, leaf_function);
  	  enum machine_mode mode;
  	  int regno;
  
  	  if (reg0 && reg1)
  	    {
  	      mode = SPARC_INT_REG_P (i) ? DImode : DFmode;
  	      regno = i;
  	    }
  	  else if (reg0)
  	    {
  	      mode = SPARC_INT_REG_P (i) ? SImode : SFmode;
  	      regno = i;
  	    }
  	  else if (reg1)
  	    {
  	      mode = SPARC_INT_REG_P (i) ? SImode : SFmode;
  	      regno = i + 1;
  	      offset += 4;
  	    }
  	  else
  	    {
  	      if (action_false == SORR_ADVANCE)
  		offset += 8;
  	      continue;
  	    }
  
  	  mem = gen_frame_mem (mode, plus_constant (base, offset));
  	  if (action_true == SORR_SAVE)
  	    {
  	      insn = emit_move_insn (mem, gen_rtx_REG (mode, regno));
  	      RTX_FRAME_RELATED_P (insn) = 1;
  	      if (mode == DImode)
  		{
  		  rtx set1, set2;
  		  mem = gen_frame_mem (SImode, plus_constant (base, offset));
  		  set1 = gen_rtx_SET (VOIDmode, mem,
  				      gen_rtx_REG (SImode, regno));
  		  RTX_FRAME_RELATED_P (set1) = 1;
  		  mem
  		    = gen_frame_mem (SImode, plus_constant (base, offset + 4));
  		  set2 = gen_rtx_SET (VOIDmode, mem,
  				      gen_rtx_REG (SImode, regno + 1));
  		  RTX_FRAME_RELATED_P (set2) = 1;
  		  add_reg_note (insn, REG_FRAME_RELATED_EXPR,
  				gen_rtx_PARALLEL (VOIDmode,
  						  gen_rtvec (2, set1, set2)));
  		}
  	    }
  	  else  /* action_true == SORR_RESTORE */
  	    emit_move_insn (gen_rtx_REG (mode, regno), mem);
  
  	  /* Always preserve double-word alignment.  */
  	  offset = (offset + 8) & -8;
  	}
      }
  
    return offset;
  }
  
  /* Emit code to adjust BASE to OFFSET.  Return the new base.  */
  
  static rtx
  emit_adjust_base_to_offset (rtx base, int offset)
  {
    /* ??? This might be optimized a little as %g1 might already have a
       value close enough that a single add insn will do.  */
    /* ??? Although, all of this is probably only a temporary fix because
       if %g1 can hold a function result, then sparc_expand_epilogue will
       lose (the result will be clobbered).  */
    rtx new_base = gen_rtx_REG (Pmode, 1);
    emit_move_insn (new_base, GEN_INT (offset));
    emit_insn (gen_rtx_SET (VOIDmode,
  			  new_base, gen_rtx_PLUS (Pmode, base, new_base)));
    return new_base;
  }
  
  /* Emit code to save/restore call-saved global and FP registers.  */
  
  static void
  emit_save_or_restore_global_fp_regs (rtx base, int offset, sorr_act_t action)
  {
    if (offset < -4096 || offset + sparc_n_global_fp_regs * 4 > 4095)
      {
        base = emit_adjust_base_to_offset  (base, offset);
        offset = 0;
      }
  
    offset
      = emit_save_or_restore_regs (0, 8, base, offset, 0,
  				 save_global_or_fp_reg_p, action, SORR_NONE);
    emit_save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, 0,
  			     save_global_or_fp_reg_p, action, SORR_NONE);
  }
  
  /* Emit code to save/restore call-saved local and in registers.  */
  
  static void
  emit_save_or_restore_local_in_regs (rtx base, int offset, sorr_act_t action)
  {
    if (offset < -4096 || offset + 16 * UNITS_PER_WORD > 4095)
      {
        base = emit_adjust_base_to_offset  (base, offset);
        offset = 0;
      }
  
    emit_save_or_restore_regs (16, 32, base, offset, sparc_leaf_function_p,
  			     save_local_or_in_reg_p, action, SORR_ADVANCE);
  }
  
  /* Emit a window_save insn.  */
  
  static rtx
  emit_window_save (rtx increment)
  {
    rtx insn = emit_insn (gen_window_save (increment));
    RTX_FRAME_RELATED_P (insn) = 1;
  
    /* The incoming return address (%o7) is saved in %i7.  */
    add_reg_note (insn, REG_CFA_REGISTER,
  		gen_rtx_SET (VOIDmode,
  			     gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM),
  			     gen_rtx_REG (Pmode,
  					  INCOMING_RETURN_ADDR_REGNUM)));
  
    /* The window save event.  */
    add_reg_note (insn, REG_CFA_WINDOW_SAVE, const0_rtx);
  
    /* The CFA is %fp, the hard frame pointer.  */
    add_reg_note (insn, REG_CFA_DEF_CFA,
  		plus_constant (hard_frame_pointer_rtx,
  			       INCOMING_FRAME_SP_OFFSET));
  
    return insn;
  }
  
  /* Generate an increment for the stack pointer.  */
  
  static rtx
  gen_stack_pointer_inc (rtx increment)
  {
    return gen_rtx_SET (VOIDmode,
  		      stack_pointer_rtx,
  		      gen_rtx_PLUS (Pmode,
  				    stack_pointer_rtx,
  				    increment));
  }
  
  /* Generate a decrement for the stack pointer.  */
  
  static rtx
  gen_stack_pointer_dec (rtx decrement)
  {
    return gen_rtx_SET (VOIDmode,
  		      stack_pointer_rtx,
  		      gen_rtx_MINUS (Pmode,
  				     stack_pointer_rtx,
  				     decrement));
  }
  
  /* Expand the function prologue.  The prologue is responsible for reserving
     storage for the frame, saving the call-saved registers and loading the
     GOT register if needed.  */
  
  void
  sparc_expand_prologue (void)
  {
    HOST_WIDE_INT size;
    rtx insn;
  
    /* Compute a snapshot of current_function_uses_only_leaf_regs.  Relying
       on the final value of the flag means deferring the prologue/epilogue
       expansion until just before the second scheduling pass, which is too
       late to emit multiple epilogues or return insns.
  
       Of course we are making the assumption that the value of the flag
       will not change between now and its final value.  Of the three parts
       of the formula, only the last one can reasonably vary.  Let's take a
       closer look, after assuming that the first two ones are set to true
       (otherwise the last value is effectively silenced).
  
       If only_leaf_regs_used returns false, the global predicate will also
       be false so the actual frame size calculated below will be positive.
       As a consequence, the save_register_window insn will be emitted in
       the instruction stream; now this insn explicitly references %fp
       which is not a leaf register so only_leaf_regs_used will always
       return false subsequently.
  
       If only_leaf_regs_used returns true, we hope that the subsequent
       optimization passes won't cause non-leaf registers to pop up.  For
       example, the regrename pass has special provisions to not rename to
       non-leaf registers in a leaf function.  */
    sparc_leaf_function_p
      = optimize > 0 && current_function_is_leaf && only_leaf_regs_used ();
  
    size = sparc_compute_frame_size (get_frame_size(), sparc_leaf_function_p);
  
    if (flag_stack_usage_info)
      current_function_static_stack_size = size;
  
    if (flag_stack_check == STATIC_BUILTIN_STACK_CHECK && size)
      sparc_emit_probe_stack_range (STACK_CHECK_PROTECT, size);
  
    if (size == 0)
      ; /* do nothing.  */
    else if (sparc_leaf_function_p)
      {
        rtx size_int_rtx = GEN_INT (-size);
  
        if (size <= 4096)
  	insn = emit_insn (gen_stack_pointer_inc (size_int_rtx));
        else if (size <= 8192)
  	{
  	  insn = emit_insn (gen_stack_pointer_inc (GEN_INT (-4096)));
  	  RTX_FRAME_RELATED_P (insn) = 1;
  
  	  /* %sp is still the CFA register.  */
  	  insn = emit_insn (gen_stack_pointer_inc (GEN_INT (4096 - size)));
  	}
        else
  	{
  	  rtx size_rtx = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (size_rtx, size_int_rtx);
  	  insn = emit_insn (gen_stack_pointer_inc (size_rtx));
  	  add_reg_note (insn, REG_FRAME_RELATED_EXPR,
  			gen_stack_pointer_inc (size_int_rtx));
  	}
  
        RTX_FRAME_RELATED_P (insn) = 1;
      }
    else
      {
        rtx size_int_rtx = GEN_INT (-size);
  
        if (size <= 4096)
  	emit_window_save (size_int_rtx);
        else if (size <= 8192)
  	{
  	  emit_window_save (GEN_INT (-4096));
  
  	  /* %sp is not the CFA register anymore.  */
  	  emit_insn (gen_stack_pointer_inc (GEN_INT (4096 - size)));
  
  	  /* Make sure no %fp-based store is issued until after the frame is
  	     established.  The offset between the frame pointer and the stack
  	     pointer is calculated relative to the value of the stack pointer
  	     at the end of the function prologue, and moving instructions that
  	     access the stack via the frame pointer between the instructions
  	     that decrement the stack pointer could result in accessing the
  	     register window save area, which is volatile.  */
  	  emit_insn (gen_frame_blockage ());
  	}
        else
  	{
  	  rtx size_rtx = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (size_rtx, size_int_rtx);
  	  emit_window_save (size_rtx);
  	}
      }
  
    if (sparc_leaf_function_p)
      {
        sparc_frame_base_reg = stack_pointer_rtx;
        sparc_frame_base_offset = size + SPARC_STACK_BIAS;
      }
    else
      {
        sparc_frame_base_reg = hard_frame_pointer_rtx;
        sparc_frame_base_offset = SPARC_STACK_BIAS;
      }
  
    if (sparc_n_global_fp_regs > 0)
      emit_save_or_restore_global_fp_regs (sparc_frame_base_reg,
  				         sparc_frame_base_offset
  					   - sparc_apparent_frame_size,
  					 SORR_SAVE);
  
    /* Load the GOT register if needed.  */
    if (crtl->uses_pic_offset_table)
      load_got_register ();
  
    /* Advertise that the data calculated just above are now valid.  */
    sparc_prologue_data_valid_p = true;
  }
  
  /* Expand the function prologue.  The prologue is responsible for reserving
     storage for the frame, saving the call-saved registers and loading the
     GOT register if needed.  */
  
  void
  sparc_flat_expand_prologue (void)
  {
    HOST_WIDE_INT size;
    rtx insn;
  
    sparc_leaf_function_p = optimize > 0 && current_function_is_leaf;
  
    size = sparc_compute_frame_size (get_frame_size(), sparc_leaf_function_p);
  
    if (flag_stack_usage_info)
      current_function_static_stack_size = size;
  
    if (flag_stack_check == STATIC_BUILTIN_STACK_CHECK && size)
      sparc_emit_probe_stack_range (STACK_CHECK_PROTECT, size);
  
    if (sparc_save_local_in_regs_p)
      emit_save_or_restore_local_in_regs (stack_pointer_rtx, SPARC_STACK_BIAS,
  					SORR_SAVE);
  
    if (size == 0)
      ; /* do nothing.  */
    else
      {
        rtx size_int_rtx, size_rtx;
  
        size_rtx = size_int_rtx = GEN_INT (-size);
  
        /* We establish the frame (i.e. decrement the stack pointer) first, even
  	 if we use a frame pointer, because we cannot clobber any call-saved
  	 registers, including the frame pointer, if we haven't created a new
  	 register save area, for the sake of compatibility with the ABI.  */
        if (size <= 4096)
  	insn = emit_insn (gen_stack_pointer_inc (size_int_rtx));
        else if (size <= 8192 && !frame_pointer_needed)
  	{
  	  insn = emit_insn (gen_stack_pointer_inc (GEN_INT (-4096)));
  	  RTX_FRAME_RELATED_P (insn) = 1;
  	  insn = emit_insn (gen_stack_pointer_inc (GEN_INT (4096 - size)));
  	}
        else
  	{
  	  size_rtx = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (size_rtx, size_int_rtx);
  	  insn = emit_insn (gen_stack_pointer_inc (size_rtx));
  	  add_reg_note (insn, REG_CFA_ADJUST_CFA,
  			gen_stack_pointer_inc (size_int_rtx));
  	}
        RTX_FRAME_RELATED_P (insn) = 1;
  
        /* Ensure nothing is scheduled until after the frame is established.  */
        emit_insn (gen_blockage ());
  
        if (frame_pointer_needed)
  	{
  	  insn = emit_insn (gen_rtx_SET (VOIDmode, hard_frame_pointer_rtx,
  					 gen_rtx_MINUS (Pmode,
  							stack_pointer_rtx,
  							size_rtx)));
  	  RTX_FRAME_RELATED_P (insn) = 1;
  
  	  add_reg_note (insn, REG_CFA_ADJUST_CFA,
  			gen_rtx_SET (VOIDmode, hard_frame_pointer_rtx,
  				     plus_constant (stack_pointer_rtx,
  						    size)));
  	}
  
        if (return_addr_reg_needed_p (sparc_leaf_function_p))
  	{
  	  rtx o7 = gen_rtx_REG (Pmode, INCOMING_RETURN_ADDR_REGNUM);
  	  rtx i7 = gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM);
  
  	  insn = emit_move_insn (i7, o7);
  	  RTX_FRAME_RELATED_P (insn) = 1;
  
  	  add_reg_note (insn, REG_CFA_REGISTER,
  			gen_rtx_SET (VOIDmode, i7, o7));
  
  	  /* Prevent this instruction from ever being considered dead,
  	     even if this function has no epilogue.  */
  	  emit_use (i7);
  	}
      }
  
    if (frame_pointer_needed)
      {
        sparc_frame_base_reg = hard_frame_pointer_rtx;
        sparc_frame_base_offset = SPARC_STACK_BIAS;
      }
    else
      {
        sparc_frame_base_reg = stack_pointer_rtx;
        sparc_frame_base_offset = size + SPARC_STACK_BIAS;
      }
  
    if (sparc_n_global_fp_regs > 0)
      emit_save_or_restore_global_fp_regs (sparc_frame_base_reg,
  				         sparc_frame_base_offset
  					   - sparc_apparent_frame_size,
  					 SORR_SAVE);
  
    /* Load the GOT register if needed.  */
    if (crtl->uses_pic_offset_table)
      load_got_register ();
  
    /* Advertise that the data calculated just above are now valid.  */
    sparc_prologue_data_valid_p = true;
  }
  
  /* This function generates the assembly code for function entry, which boils
     down to emitting the necessary .register directives.  */
  
  static void
  sparc_asm_function_prologue (FILE *file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
  {
    /* Check that the assumption we made in sparc_expand_prologue is valid.  */
    if (!TARGET_FLAT)
      gcc_assert (sparc_leaf_function_p == current_function_uses_only_leaf_regs);
  
    sparc_output_scratch_registers (file);
  }
  
  /* Expand the function epilogue, either normal or part of a sibcall.
     We emit all the instructions except the return or the call.  */
  
  void
  sparc_expand_epilogue (bool for_eh)
  {
    HOST_WIDE_INT size = sparc_frame_size;
  
    if (sparc_n_global_fp_regs > 0)
      emit_save_or_restore_global_fp_regs (sparc_frame_base_reg,
  				         sparc_frame_base_offset
  					   - sparc_apparent_frame_size,
  					 SORR_RESTORE);
  
    if (size == 0 || for_eh)
      ; /* do nothing.  */
    else if (sparc_leaf_function_p)
      {
        if (size <= 4096)
  	emit_insn (gen_stack_pointer_dec (GEN_INT (-size)));
        else if (size <= 8192)
  	{
  	  emit_insn (gen_stack_pointer_dec (GEN_INT (-4096)));
  	  emit_insn (gen_stack_pointer_dec (GEN_INT (4096 - size)));
  	}
        else
  	{
  	  rtx reg = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (reg, GEN_INT (-size));
  	  emit_insn (gen_stack_pointer_dec (reg));
  	}
      }
  }
  
  /* Expand the function epilogue, either normal or part of a sibcall.
     We emit all the instructions except the return or the call.  */
  
  void
  sparc_flat_expand_epilogue (bool for_eh)
  {
    HOST_WIDE_INT size = sparc_frame_size;
  
    if (sparc_n_global_fp_regs > 0)
      emit_save_or_restore_global_fp_regs (sparc_frame_base_reg,
  				         sparc_frame_base_offset
  					   - sparc_apparent_frame_size,
  					 SORR_RESTORE);
  
    /* If we have a frame pointer, we'll need both to restore it before the
       frame is destroyed and use its current value in destroying the frame.
       Since we don't have an atomic way to do that in the flat window model,
       we save the current value into a temporary register (%g1).  */
    if (frame_pointer_needed && !for_eh)
      emit_move_insn (gen_rtx_REG (Pmode, 1), hard_frame_pointer_rtx);
  
    if (return_addr_reg_needed_p (sparc_leaf_function_p))
      emit_move_insn (gen_rtx_REG (Pmode, INCOMING_RETURN_ADDR_REGNUM),
  		    gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM));
  
    if (sparc_save_local_in_regs_p)
      emit_save_or_restore_local_in_regs (sparc_frame_base_reg,
  					sparc_frame_base_offset,
  					SORR_RESTORE);
  
    if (size == 0 || for_eh)
      ; /* do nothing.  */
    else if (frame_pointer_needed)
      {
        /* Make sure the frame is destroyed after everything else is done.  */
        emit_insn (gen_blockage ());
  
        emit_move_insn (stack_pointer_rtx, gen_rtx_REG (Pmode, 1));
      }
    else
      {
        /* Likewise.  */
        emit_insn (gen_blockage ());
  
        if (size <= 4096)
  	emit_insn (gen_stack_pointer_dec (GEN_INT (-size)));
        else if (size <= 8192)
  	{
  	  emit_insn (gen_stack_pointer_dec (GEN_INT (-4096)));
  	  emit_insn (gen_stack_pointer_dec (GEN_INT (4096 - size)));
  	}
        else
  	{
  	  rtx reg = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (reg, GEN_INT (-size));
  	  emit_insn (gen_stack_pointer_dec (reg));
  	}
      }
  }
  
  /* Return true if it is appropriate to emit `return' instructions in the
     body of a function.  */
  
  bool
  sparc_can_use_return_insn_p (void)
  {
    return sparc_prologue_data_valid_p
  	 && sparc_n_global_fp_regs == 0
  	 && TARGET_FLAT
  	    ? (sparc_frame_size == 0 && !sparc_save_local_in_regs_p)
  	    : (sparc_frame_size == 0 || !sparc_leaf_function_p);
  }
  
  /* This function generates the assembly code for function exit.  */
  
  static void
  sparc_asm_function_epilogue (FILE *file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
  {
    /* If the last two instructions of a function are "call foo; dslot;"
       the return address might point to the first instruction in the next
       function and we have to output a dummy nop for the sake of sane
       backtraces in such cases.  This is pointless for sibling calls since
       the return address is explicitly adjusted.  */
  
    rtx insn, last_real_insn;
  
    insn = get_last_insn ();
  
    last_real_insn = prev_real_insn (insn);
    if (last_real_insn
        && GET_CODE (last_real_insn) == INSN
        && GET_CODE (PATTERN (last_real_insn)) == SEQUENCE)
      last_real_insn = XVECEXP (PATTERN (last_real_insn), 0, 0);
  
    if (last_real_insn
        && CALL_P (last_real_insn)
        && !SIBLING_CALL_P (last_real_insn))
      fputs("\tnop\n", file);
  
    sparc_output_deferred_case_vectors ();
  }
  
  /* Output a 'restore' instruction.  */
  
  static void
  output_restore (rtx pat)
  {
    rtx operands[3];
  
    if (! pat)
      {
        fputs ("\t restore\n", asm_out_file);
        return;
      }
  
    gcc_assert (GET_CODE (pat) == SET);
  
    operands[0] = SET_DEST (pat);
    pat = SET_SRC (pat);
  
    switch (GET_CODE (pat))
      {
        case PLUS:
  	operands[1] = XEXP (pat, 0);
  	operands[2] = XEXP (pat, 1);
  	output_asm_insn (" restore %r1, %2, %Y0", operands);
  	break;
        case LO_SUM:
  	operands[1] = XEXP (pat, 0);
  	operands[2] = XEXP (pat, 1);
  	output_asm_insn (" restore %r1, %%lo(%a2), %Y0", operands);
  	break;
        case ASHIFT:
  	operands[1] = XEXP (pat, 0);
  	gcc_assert (XEXP (pat, 1) == const1_rtx);
  	output_asm_insn (" restore %r1, %r1, %Y0", operands);
  	break;
        default:
  	operands[1] = pat;
  	output_asm_insn (" restore %%g0, %1, %Y0", operands);
  	break;
      }
  }
  
  /* Output a return.  */
  
  const char *
  output_return (rtx insn)
  {
    if (crtl->calls_eh_return)
      {
        /* If the function uses __builtin_eh_return, the eh_return
  	 machinery occupies the delay slot.  */
        gcc_assert (!final_sequence);
  
        if (flag_delayed_branch)
  	{
  	  if (!TARGET_FLAT && TARGET_V9)
  	    fputs ("\treturn\t%i7+8\n", asm_out_file);
  	  else
  	    {
  	      if (!TARGET_FLAT)
  		fputs ("\trestore\n", asm_out_file);
  
  	      fputs ("\tjmp\t%o7+8\n", asm_out_file);
  	    }
  
  	  fputs ("\t add\t%sp, %g1, %sp\n", asm_out_file);
  	}
        else
  	{
  	  if (!TARGET_FLAT)
  	    fputs ("\trestore\n", asm_out_file);
  
  	  fputs ("\tadd\t%sp, %g1, %sp\n", asm_out_file);
  	  fputs ("\tjmp\t%o7+8\n\t nop\n", asm_out_file);
  	}
      }
    else if (sparc_leaf_function_p || TARGET_FLAT)
      {
        /* This is a leaf or flat function so we don't have to bother restoring
  	 the register window, which frees us from dealing with the convoluted
  	 semantics of restore/return.  We simply output the jump to the
  	 return address and the insn in the delay slot (if any).  */
  
        return "jmp\t%%o7+%)%#";
      }
    else
      {
        /* This is a regular function so we have to restore the register window.
  	 We may have a pending insn for the delay slot, which will be either
  	 combined with the 'restore' instruction or put in the delay slot of
  	 the 'return' instruction.  */
  
        if (final_sequence)
  	{
  	  rtx delay, pat;
  
  	  delay = NEXT_INSN (insn);
  	  gcc_assert (delay);
  
  	  pat = PATTERN (delay);
  
  	  if (TARGET_V9 && ! epilogue_renumber (&pat, 1))
  	    {
  	      epilogue_renumber (&pat, 0);
  	      return "return\t%%i7+%)%#";
  	    }
  	  else
  	    {
  	      output_asm_insn ("jmp\t%%i7+%)", NULL);
  	      output_restore (pat);
  	      PATTERN (delay) = gen_blockage ();
  	      INSN_CODE (delay) = -1;
  	    }
  	}
        else
          {
  	  /* The delay slot is empty.  */
  	  if (TARGET_V9)
  	    return "return\t%%i7+%)\n\t nop";
  	  else if (flag_delayed_branch)
  	    return "jmp\t%%i7+%)\n\t restore";
  	  else
  	    return "restore\n\tjmp\t%%o7+%)\n\t nop";
  	}
      }
  
    return "";
  }
  
  /* Output a sibling call.  */
  
  const char *
  output_sibcall (rtx insn, rtx call_operand)
  {
    rtx operands[1];
  
    gcc_assert (flag_delayed_branch);
  
    operands[0] = call_operand;
  
    if (sparc_leaf_function_p || TARGET_FLAT)
      {
        /* This is a leaf or flat function so we don't have to bother restoring
  	 the register window.  We simply output the jump to the function and
  	 the insn in the delay slot (if any).  */
  
        gcc_assert (!(LEAF_SIBCALL_SLOT_RESERVED_P && final_sequence));
  
        if (final_sequence)
  	output_asm_insn ("sethi\t%%hi(%a0), %%g1\n\tjmp\t%%g1 + %%lo(%a0)%#",
  			 operands);
        else
  	/* Use or with rs2 %%g0 instead of mov, so that as/ld can optimize
  	   it into branch if possible.  */
  	output_asm_insn ("or\t%%o7, %%g0, %%g1\n\tcall\t%a0, 0\n\t or\t%%g1, %%g0, %%o7",
  			 operands);
      }
    else
      {
        /* This is a regular function so we have to restore the register window.
  	 We may have a pending insn for the delay slot, which will be combined
  	 with the 'restore' instruction.  */
  
        output_asm_insn ("call\t%a0, 0", operands);
  
        if (final_sequence)
  	{
  	  rtx delay = NEXT_INSN (insn);
  	  gcc_assert (delay);
  
  	  output_restore (PATTERN (delay));
  
  	  PATTERN (delay) = gen_blockage ();
  	  INSN_CODE (delay) = -1;
  	}
        else
  	output_restore (NULL_RTX);
      }
  
    return "";
  }
  
  /* Functions for handling argument passing.
  
     For 32-bit, the first 6 args are normally in registers and the rest are
     pushed.  Any arg that starts within the first 6 words is at least
     partially passed in a register unless its data type forbids.
  
     For 64-bit, the argument registers are laid out as an array of 16 elements
     and arguments are added sequentially.  The first 6 int args and up to the
     first 16 fp args (depending on size) are passed in regs.
  
     Slot    Stack   Integral   Float   Float in structure   Double   Long Double
     ----    -----   --------   -----   ------------------   ------   -----------
      15   [SP+248]              %f31       %f30,%f31         %d30
      14   [SP+240]              %f29       %f28,%f29         %d28       %q28
      13   [SP+232]              %f27       %f26,%f27         %d26
      12   [SP+224]              %f25       %f24,%f25         %d24       %q24
      11   [SP+216]              %f23       %f22,%f23         %d22
      10   [SP+208]              %f21       %f20,%f21         %d20       %q20
       9   [SP+200]              %f19       %f18,%f19         %d18
       8   [SP+192]              %f17       %f16,%f17         %d16       %q16
       7   [SP+184]              %f15       %f14,%f15         %d14
       6   [SP+176]              %f13       %f12,%f13         %d12       %q12
       5   [SP+168]     %o5      %f11       %f10,%f11         %d10
       4   [SP+160]     %o4       %f9        %f8,%f9           %d8        %q8
       3   [SP+152]     %o3       %f7        %f6,%f7           %d6
       2   [SP+144]     %o2       %f5        %f4,%f5           %d4        %q4
       1   [SP+136]     %o1       %f3        %f2,%f3           %d2
       0   [SP+128]     %o0       %f1        %f0,%f1           %d0        %q0
  
     Here SP = %sp if -mno-stack-bias or %sp+stack_bias otherwise.
  
     Integral arguments are always passed as 64-bit quantities appropriately
     extended.
  
     Passing of floating point values is handled as follows.
     If a prototype is in scope:
       If the value is in a named argument (i.e. not a stdarg function or a
       value not part of the `...') then the value is passed in the appropriate
       fp reg.
       If the value is part of the `...' and is passed in one of the first 6
       slots then the value is passed in the appropriate int reg.
       If the value is part of the `...' and is not passed in one of the first 6
       slots then the value is passed in memory.
     If a prototype is not in scope:
       If the value is one of the first 6 arguments the value is passed in the
       appropriate integer reg and the appropriate fp reg.
       If the value is not one of the first 6 arguments the value is passed in
       the appropriate fp reg and in memory.
  
  
     Summary of the calling conventions implemented by GCC on the SPARC:
  
     32-bit ABI:
                                  size      argument     return value
  
        small integer              <4       int. reg.      int. reg.
        word                        4       int. reg.      int. reg.
        double word                 8       int. reg.      int. reg.
  
        _Complex small integer     <8       int. reg.      int. reg.
        _Complex word               8       int. reg.      int. reg.
        _Complex double word       16        memory        int. reg.
  
        vector integer            <=8       int. reg.       FP reg.
        vector integer             >8        memory         memory
  
        float                       4       int. reg.       FP reg.
        double                      8       int. reg.       FP reg.
        long double                16        memory         memory
  
        _Complex float              8        memory         FP reg.
        _Complex double            16        memory         FP reg.
        _Complex long double       32        memory         FP reg.
  
        vector float              any        memory         memory
  
        aggregate                 any        memory         memory
  
  
  
      64-bit ABI:
                                  size      argument     return value
  
        small integer              <8       int. reg.      int. reg.
        word                        8       int. reg.      int. reg.
        double word                16       int. reg.      int. reg.
  
        _Complex small integer    <16       int. reg.      int. reg.
        _Complex word              16       int. reg.      int. reg.
        _Complex double word       32        memory        int. reg.
  
        vector integer           <=16        FP reg.        FP reg.
        vector integer       16<s<=32        memory         FP reg.
        vector integer            >32        memory         memory
  
        float                       4        FP reg.        FP reg.
        double                      8        FP reg.        FP reg.
        long double                16        FP reg.        FP reg.
  
        _Complex float              8        FP reg.        FP reg.
        _Complex double            16        FP reg.        FP reg.
        _Complex long double       32        memory         FP reg.
  
        vector float             <=16        FP reg.        FP reg.
        vector float         16<s<=32        memory         FP reg.
        vector float              >32        memory         memory
  
        aggregate                <=16         reg.           reg.
        aggregate            16<s<=32        memory          reg.
        aggregate                 >32        memory         memory
  
  
  
  Note #1: complex floating-point types follow the extended SPARC ABIs as
  implemented by the Sun compiler.
  
  Note #2: integral vector types follow the scalar floating-point types
  conventions to match what is implemented by the Sun VIS SDK.
  
  Note #3: floating-point vector types follow the aggregate types
  conventions.  */
  
  
  /* Maximum number of int regs for args.  */
  #define SPARC_INT_ARG_MAX 6
  /* Maximum number of fp regs for args.  */
  #define SPARC_FP_ARG_MAX 16
  
  #define ROUND_ADVANCE(SIZE) (((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
  
  /* Handle the INIT_CUMULATIVE_ARGS macro.
     Initialize a variable CUM of type CUMULATIVE_ARGS
     for a call to a function whose data type is FNTYPE.
     For a library call, FNTYPE is 0.  */
  
  void
  init_cumulative_args (struct sparc_args *cum, tree fntype,
  		      rtx libname ATTRIBUTE_UNUSED,
  		      tree fndecl ATTRIBUTE_UNUSED)
  {
    cum->words = 0;
    cum->prototype_p = fntype && prototype_p (fntype);
    cum->libcall_p = fntype == 0;
  }
  
  /* Handle promotion of pointer and integer arguments.  */
  
  static enum machine_mode
  sparc_promote_function_mode (const_tree type,
                               enum machine_mode mode,
                               int *punsignedp,
                               const_tree fntype ATTRIBUTE_UNUSED,
                               int for_return ATTRIBUTE_UNUSED)
  {
    if (type != NULL_TREE && POINTER_TYPE_P (type))
      {
        *punsignedp = POINTERS_EXTEND_UNSIGNED;
        return Pmode;
      }
  
    /* Integral arguments are passed as full words, as per the ABI.  */
    if (GET_MODE_CLASS (mode) == MODE_INT
        && GET_MODE_SIZE (mode) < UNITS_PER_WORD)
      return word_mode;
  
    return mode;
  }
  
  /* Handle the TARGET_STRICT_ARGUMENT_NAMING target hook.  */
  
  static bool
  sparc_strict_argument_naming (cumulative_args_t ca ATTRIBUTE_UNUSED)
  {
    return TARGET_ARCH64 ? true : false;
  }
  
  /* Scan the record type TYPE and return the following predicates:
      - INTREGS_P: the record contains at least one field or sub-field
        that is eligible for promotion in integer registers.
      - FP_REGS_P: the record contains at least one field or sub-field
        that is eligible for promotion in floating-point registers.
      - PACKED_P: the record contains at least one field that is packed.
  
     Sub-fields are not taken into account for the PACKED_P predicate.  */
  
  static void
  scan_record_type (const_tree type, int *intregs_p, int *fpregs_p,
  		  int *packed_p)
  {
    tree field;
  
    for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
      {
        if (TREE_CODE (field) == FIELD_DECL)
  	{
  	  if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
  	    scan_record_type (TREE_TYPE (field), intregs_p, fpregs_p, 0);
  	  else if ((FLOAT_TYPE_P (TREE_TYPE (field))
  		   || TREE_CODE (TREE_TYPE (field)) == VECTOR_TYPE)
  		  && TARGET_FPU)
  	    *fpregs_p = 1;
  	  else
  	    *intregs_p = 1;
  
  	  if (packed_p && DECL_PACKED (field))
  	    *packed_p = 1;
  	}
      }
  }
  
  /* Compute the slot number to pass an argument in.
     Return the slot number or -1 if passing on the stack.
  
     CUM is a variable of type CUMULATIVE_ARGS which gives info about
      the preceding args and about the function being called.
     MODE is the argument's machine mode.
     TYPE is the data type of the argument (as a tree).
      This is null for libcalls where that information may
      not be available.
     NAMED is nonzero if this argument is a named parameter
      (otherwise it is an extra parameter matching an ellipsis).
     INCOMING_P is zero for FUNCTION_ARG, nonzero for FUNCTION_INCOMING_ARG.
     *PREGNO records the register number to use if scalar type.
     *PPADDING records the amount of padding needed in words.  */
  
  static int
  function_arg_slotno (const struct sparc_args *cum, enum machine_mode mode,
  		     const_tree type, bool named, bool incoming_p,
  		     int *pregno, int *ppadding)
  {
    int regbase = (incoming_p
  		 ? SPARC_INCOMING_INT_ARG_FIRST
  		 : SPARC_OUTGOING_INT_ARG_FIRST);
    int slotno = cum->words;
    enum mode_class mclass;
    int regno;
  
    *ppadding = 0;
  
    if (type && TREE_ADDRESSABLE (type))
      return -1;
  
    if (TARGET_ARCH32
        && mode == BLKmode
        && type
        && TYPE_ALIGN (type) % PARM_BOUNDARY != 0)
      return -1;
  
    /* For SPARC64, objects requiring 16-byte alignment get it.  */
    if (TARGET_ARCH64
        && (type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode)) >= 128
        && (slotno & 1) != 0)
      slotno++, *ppadding = 1;
  
    mclass = GET_MODE_CLASS (mode);
    if (type && TREE_CODE (type) == VECTOR_TYPE)
      {
        /* Vector types deserve special treatment because they are
  	 polymorphic wrt their mode, depending upon whether VIS
  	 instructions are enabled.  */
        if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
  	{
  	  /* The SPARC port defines no floating-point vector modes.  */
  	  gcc_assert (mode == BLKmode);
  	}
        else
  	{
  	  /* Integral vector types should either have a vector
  	     mode or an integral mode, because we are guaranteed
  	     by pass_by_reference that their size is not greater
  	     than 16 bytes and TImode is 16-byte wide.  */
  	  gcc_assert (mode != BLKmode);
  
  	  /* Vector integers are handled like floats according to
  	     the Sun VIS SDK.  */
  	  mclass = MODE_FLOAT;
  	}
      }
  
    switch (mclass)
      {
      case MODE_FLOAT:
      case MODE_COMPLEX_FLOAT:
      case MODE_VECTOR_INT:
        if (TARGET_ARCH64 && TARGET_FPU && named)
  	{
  	  if (slotno >= SPARC_FP_ARG_MAX)
  	    return -1;
  	  regno = SPARC_FP_ARG_FIRST + slotno * 2;
  	  /* Arguments filling only one single FP register are
  	     right-justified in the outer double FP register.  */
  	  if (GET_MODE_SIZE (mode) <= 4)
  	    regno++;
  	  break;
  	}
        /* fallthrough */
  
      case MODE_INT:
      case MODE_COMPLEX_INT:
        if (slotno >= SPARC_INT_ARG_MAX)
  	return -1;
        regno = regbase + slotno;
        break;
  
      case MODE_RANDOM:
        if (mode == VOIDmode)
  	/* MODE is VOIDmode when generating the actual call.  */
  	return -1;
  
        gcc_assert (mode == BLKmode);
  
        if (TARGET_ARCH32
  	  || !type
  	  || (TREE_CODE (type) != VECTOR_TYPE
  	      && TREE_CODE (type) != RECORD_TYPE))
  	{
  	  if (slotno >= SPARC_INT_ARG_MAX)
  	    return -1;
  	  regno = regbase + slotno;
  	}
        else  /* TARGET_ARCH64 && type */
  	{
  	  int intregs_p = 0, fpregs_p = 0, packed_p = 0;
  
  	  /* First see what kinds of registers we would need.  */
  	  if (TREE_CODE (type) == VECTOR_TYPE)
  	    fpregs_p = 1;
  	  else
  	    scan_record_type (type, &intregs_p, &fpregs_p, &packed_p);
  
  	  /* The ABI obviously doesn't specify how packed structures
  	     are passed.  These are defined to be passed in int regs
  	     if possible, otherwise memory.  */
  	  if (packed_p || !named)
  	    fpregs_p = 0, intregs_p = 1;
  
  	  /* If all arg slots are filled, then must pass on stack.  */
  	  if (fpregs_p && slotno >= SPARC_FP_ARG_MAX)
  	    return -1;
  
  	  /* If there are only int args and all int arg slots are filled,
  	     then must pass on stack.  */
  	  if (!fpregs_p && intregs_p && slotno >= SPARC_INT_ARG_MAX)
  	    return -1;
  
  	  /* Note that even if all int arg slots are filled, fp members may
  	     still be passed in regs if such regs are available.
  	     *PREGNO isn't set because there may be more than one, it's up
  	     to the caller to compute them.  */
  	  return slotno;
  	}
        break;
  
      default :
        gcc_unreachable ();
      }
  
    *pregno = regno;
    return slotno;
  }
  
  /* Handle recursive register counting for structure field layout.  */
  
  struct function_arg_record_value_parms
  {
    rtx ret;		/* return expression being built.  */
    int slotno;		/* slot number of the argument.  */
    int named;		/* whether the argument is named.  */
    int regbase;		/* regno of the base register.  */
    int stack;		/* 1 if part of the argument is on the stack.  */
    int intoffset;	/* offset of the first pending integer field.  */
    unsigned int nregs;	/* number of words passed in registers.  */
  };
  
  static void function_arg_record_value_3
   (HOST_WIDE_INT, struct function_arg_record_value_parms *);
  static void function_arg_record_value_2
   (const_tree, HOST_WIDE_INT, struct function_arg_record_value_parms *, bool);
  static void function_arg_record_value_1
   (const_tree, HOST_WIDE_INT, struct function_arg_record_value_parms *, bool);
  static rtx function_arg_record_value (const_tree, enum machine_mode, int, int, int);
  static rtx function_arg_union_value (int, enum machine_mode, int, int);
  
  /* A subroutine of function_arg_record_value.  Traverse the structure
     recursively and determine how many registers will be required.  */
  
  static void
  function_arg_record_value_1 (const_tree type, HOST_WIDE_INT startbitpos,
  			     struct function_arg_record_value_parms *parms,
  			     bool packed_p)
  {
    tree field;
  
    /* We need to compute how many registers are needed so we can
       allocate the PARALLEL but before we can do that we need to know
       whether there are any packed fields.  The ABI obviously doesn't
       specify how structures are passed in this case, so they are
       defined to be passed in int regs if possible, otherwise memory,
       regardless of whether there are fp values present.  */
  
    if (! packed_p)
      for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
        {
  	if (TREE_CODE (field) == FIELD_DECL && DECL_PACKED (field))
  	  {
  	    packed_p = true;
  	    break;
  	  }
        }
  
    /* Compute how many registers we need.  */
    for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
      {
        if (TREE_CODE (field) == FIELD_DECL)
  	{
  	  HOST_WIDE_INT bitpos = startbitpos;
  
  	  if (DECL_SIZE (field) != 0)
  	    {
  	      if (integer_zerop (DECL_SIZE (field)))
  		continue;
  
  	      if (host_integerp (bit_position (field), 1))
  		bitpos += int_bit_position (field);
  	    }
  
  	  /* ??? FIXME: else assume zero offset.  */
  
  	  if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
  	    function_arg_record_value_1 (TREE_TYPE (field),
  	    				 bitpos,
  					 parms,
  					 packed_p);
  	  else if ((FLOAT_TYPE_P (TREE_TYPE (field))
  		    || TREE_CODE (TREE_TYPE (field)) == VECTOR_TYPE)
  		   && TARGET_FPU
  		   && parms->named
  		   && ! packed_p)
  	    {
  	      if (parms->intoffset != -1)
  		{
  		  unsigned int startbit, endbit;
  		  int intslots, this_slotno;
  
  		  startbit = parms->intoffset & -BITS_PER_WORD;
  		  endbit   = (bitpos + BITS_PER_WORD - 1) & -BITS_PER_WORD;
  
  		  intslots = (endbit - startbit) / BITS_PER_WORD;
  		  this_slotno = parms->slotno + parms->intoffset
  		    / BITS_PER_WORD;
  
  		  if (intslots > 0 && intslots > SPARC_INT_ARG_MAX - this_slotno)
  		    {
  		      intslots = MAX (0, SPARC_INT_ARG_MAX - this_slotno);
  		      /* We need to pass this field on the stack.  */
  		      parms->stack = 1;
  		    }
  
  		  parms->nregs += intslots;
  		  parms->intoffset = -1;
  		}
  
  	      /* There's no need to check this_slotno < SPARC_FP_ARG MAX.
  		 If it wasn't true we wouldn't be here.  */
  	      if (TREE_CODE (TREE_TYPE (field)) == VECTOR_TYPE
  		  && DECL_MODE (field) == BLKmode)
  		parms->nregs += TYPE_VECTOR_SUBPARTS (TREE_TYPE (field));
  	      else if (TREE_CODE (TREE_TYPE (field)) == COMPLEX_TYPE)
  		parms->nregs += 2;
  	      else
  		parms->nregs += 1;
  	    }
  	  else
  	    {
  	      if (parms->intoffset == -1)
  		parms->intoffset = bitpos;
  	    }
  	}
      }
  }
  
  /* A subroutine of function_arg_record_value.  Assign the bits of the
     structure between parms->intoffset and bitpos to integer registers.  */
  
  static void
  function_arg_record_value_3 (HOST_WIDE_INT bitpos,
  			     struct function_arg_record_value_parms *parms)
  {
    enum machine_mode mode;
    unsigned int regno;
    unsigned int startbit, endbit;
    int this_slotno, intslots, intoffset;
    rtx reg;
  
    if (parms->intoffset == -1)
      return;
  
    intoffset = parms->intoffset;
    parms->intoffset = -1;
  
    startbit = intoffset & -BITS_PER_WORD;
    endbit = (bitpos + BITS_PER_WORD - 1) & -BITS_PER_WORD;
    intslots = (endbit - startbit) / BITS_PER_WORD;
    this_slotno = parms->slotno + intoffset / BITS_PER_WORD;
  
    intslots = MIN (intslots, SPARC_INT_ARG_MAX - this_slotno);
    if (intslots <= 0)
      return;
  
    /* If this is the trailing part of a word, only load that much into
       the register.  Otherwise load the whole register.  Note that in
       the latter case we may pick up unwanted bits.  It's not a problem
       at the moment but may wish to revisit.  */
  
    if (intoffset % BITS_PER_WORD != 0)
      mode = smallest_mode_for_size (BITS_PER_WORD - intoffset % BITS_PER_WORD,
  			  	   MODE_INT);
    else
      mode = word_mode;
  
    intoffset /= BITS_PER_UNIT;
    do
      {
        regno = parms->regbase + this_slotno;
        reg = gen_rtx_REG (mode, regno);
        XVECEXP (parms->ret, 0, parms->stack + parms->nregs)
  	= gen_rtx_EXPR_LIST (VOIDmode, reg, GEN_INT (intoffset));
  
        this_slotno += 1;
        intoffset = (intoffset | (UNITS_PER_WORD-1)) + 1;
        mode = word_mode;
        parms->nregs += 1;
        intslots -= 1;
      }
    while (intslots > 0);
  }
  
  /* A subroutine of function_arg_record_value.  Traverse the structure
     recursively and assign bits to floating point registers.  Track which
     bits in between need integer registers; invoke function_arg_record_value_3
     to make that happen.  */
  
  static void
  function_arg_record_value_2 (const_tree type, HOST_WIDE_INT startbitpos,
  			     struct function_arg_record_value_parms *parms,
  			     bool packed_p)
  {
    tree field;
  
    if (! packed_p)
      for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
        {
  	if (TREE_CODE (field) == FIELD_DECL && DECL_PACKED (field))
  	  {
  	    packed_p = true;
  	    break;
  	  }
        }
  
    for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
      {
        if (TREE_CODE (field) == FIELD_DECL)
  	{
  	  HOST_WIDE_INT bitpos = startbitpos;
  
  	  if (DECL_SIZE (field) != 0)
  	    {
  	      if (integer_zerop (DECL_SIZE (field)))
  		continue;
  
  	      if (host_integerp (bit_position (field), 1))
  		bitpos += int_bit_position (field);
  	    }
  
  	  /* ??? FIXME: else assume zero offset.  */
  
  	  if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
  	    function_arg_record_value_2 (TREE_TYPE (field),
  	    				 bitpos,
  					 parms,
  					 packed_p);
  	  else if ((FLOAT_TYPE_P (TREE_TYPE (field))
  		    || TREE_CODE (TREE_TYPE (field)) == VECTOR_TYPE)
  		   && TARGET_FPU
  		   && parms->named
  		   && ! packed_p)
  	    {
  	      int this_slotno = parms->slotno + bitpos / BITS_PER_WORD;
  	      int regno, nregs, pos;
  	      enum machine_mode mode = DECL_MODE (field);
  	      rtx reg;
  
  	      function_arg_record_value_3 (bitpos, parms);
  
  	      if (TREE_CODE (TREE_TYPE (field)) == VECTOR_TYPE
  		  && mode == BLKmode)
  	        {
  		  mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (field)));
  		  nregs = TYPE_VECTOR_SUBPARTS (TREE_TYPE (field));
  		}
  	      else if (TREE_CODE (TREE_TYPE (field)) == COMPLEX_TYPE)
  	        {
  		  mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (field)));
  		  nregs = 2;
  		}
  	      else
  	        nregs = 1;
  
  	      regno = SPARC_FP_ARG_FIRST + this_slotno * 2;
  	      if (GET_MODE_SIZE (mode) <= 4 && (bitpos & 32) != 0)
  		regno++;
  	      reg = gen_rtx_REG (mode, regno);
  	      pos = bitpos / BITS_PER_UNIT;
  	      XVECEXP (parms->ret, 0, parms->stack + parms->nregs)
  		= gen_rtx_EXPR_LIST (VOIDmode, reg, GEN_INT (pos));
  	      parms->nregs += 1;
  	      while (--nregs > 0)
  		{
  		  regno += GET_MODE_SIZE (mode) / 4;
  	  	  reg = gen_rtx_REG (mode, regno);
  		  pos += GET_MODE_SIZE (mode);
  		  XVECEXP (parms->ret, 0, parms->stack + parms->nregs)
  		    = gen_rtx_EXPR_LIST (VOIDmode, reg, GEN_INT (pos));
  		  parms->nregs += 1;
  		}
  	    }
  	  else
  	    {
  	      if (parms->intoffset == -1)
  		parms->intoffset = bitpos;
  	    }
  	}
      }
  }
  
  /* Used by function_arg and sparc_function_value_1 to implement the complex
     conventions of the 64-bit ABI for passing and returning structures.
     Return an expression valid as a return value for the FUNCTION_ARG
     and TARGET_FUNCTION_VALUE.
  
     TYPE is the data type of the argument (as a tree).
      This is null for libcalls where that information may
      not be available.
     MODE is the argument's machine mode.
     SLOTNO is the index number of the argument's slot in the parameter array.
     NAMED is nonzero if this argument is a named parameter
      (otherwise it is an extra parameter matching an ellipsis).
     REGBASE is the regno of the base register for the parameter array.  */
  
  static rtx
  function_arg_record_value (const_tree type, enum machine_mode mode,
  			   int slotno, int named, int regbase)
  {
    HOST_WIDE_INT typesize = int_size_in_bytes (type);
    struct function_arg_record_value_parms parms;
    unsigned int nregs;
  
    parms.ret = NULL_RTX;
    parms.slotno = slotno;
    parms.named = named;
    parms.regbase = regbase;
    parms.stack = 0;
  
    /* Compute how many registers we need.  */
    parms.nregs = 0;
    parms.intoffset = 0;
    function_arg_record_value_1 (type, 0, &parms, false);
  
    /* Take into account pending integer fields.  */
    if (parms.intoffset != -1)
      {
        unsigned int startbit, endbit;
        int intslots, this_slotno;
  
        startbit = parms.intoffset & -BITS_PER_WORD;
        endbit = (typesize*BITS_PER_UNIT + BITS_PER_WORD - 1) & -BITS_PER_WORD;
        intslots = (endbit - startbit) / BITS_PER_WORD;
        this_slotno = slotno + parms.intoffset / BITS_PER_WORD;
  
        if (intslots > 0 && intslots > SPARC_INT_ARG_MAX - this_slotno)
          {
  	  intslots = MAX (0, SPARC_INT_ARG_MAX - this_slotno);
  	  /* We need to pass this field on the stack.  */
  	  parms.stack = 1;
          }
  
        parms.nregs += intslots;
      }
    nregs = parms.nregs;
  
    /* Allocate the vector and handle some annoying special cases.  */
    if (nregs == 0)
      {
        /* ??? Empty structure has no value?  Duh?  */
        if (typesize <= 0)
  	{
  	  /* Though there's nothing really to store, return a word register
  	     anyway so the rest of gcc doesn't go nuts.  Returning a PARALLEL
  	     leads to breakage due to the fact that there are zero bytes to
  	     load.  */
  	  return gen_rtx_REG (mode, regbase);
  	}
        else
  	{
  	  /* ??? C++ has structures with no fields, and yet a size.  Give up
  	     for now and pass everything back in integer registers.  */
  	  nregs = (typesize + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
  	}
        if (nregs + slotno > SPARC_INT_ARG_MAX)
  	nregs = SPARC_INT_ARG_MAX - slotno;
      }
    gcc_assert (nregs != 0 || parms.stack);
  
    parms.ret = gen_rtx_PARALLEL (mode, rtvec_alloc (parms.stack + nregs));
  
    /* If at least one field must be passed on the stack, generate
       (parallel [(expr_list (nil) ...) ...]) so that all fields will
       also be passed on the stack.  We can't do much better because the
       semantics of TARGET_ARG_PARTIAL_BYTES doesn't handle the case
       of structures for which the fields passed exclusively in registers
       are not at the beginning of the structure.  */
    if (parms.stack)
      XVECEXP (parms.ret, 0, 0)
        = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX, const0_rtx);
  
    /* Fill in the entries.  */
    parms.nregs = 0;
    parms.intoffset = 0;
    function_arg_record_value_2 (type, 0, &parms, false);
    function_arg_record_value_3 (typesize * BITS_PER_UNIT, &parms);
  
    gcc_assert (parms.nregs == nregs);
  
    return parms.ret;
  }
  
  /* Used by function_arg and sparc_function_value_1 to implement the conventions
     of the 64-bit ABI for passing and returning unions.
     Return an expression valid as a return value for the FUNCTION_ARG
     and TARGET_FUNCTION_VALUE.
  
     SIZE is the size in bytes of the union.
     MODE is the argument's machine mode.
     REGNO is the hard register the union will be passed in.  */
  
  static rtx
  function_arg_union_value (int size, enum machine_mode mode, int slotno,
  			  int regno)
  {
    int nwords = ROUND_ADVANCE (size), i;
    rtx regs;
  
    /* See comment in previous function for empty structures.  */
    if (nwords == 0)
      return gen_rtx_REG (mode, regno);
  
    if (slotno == SPARC_INT_ARG_MAX - 1)
      nwords = 1;
  
    regs = gen_rtx_PARALLEL (mode, rtvec_alloc (nwords));
  
    for (i = 0; i < nwords; i++)
      {
        /* Unions are passed left-justified.  */
        XVECEXP (regs, 0, i)
  	= gen_rtx_EXPR_LIST (VOIDmode,
  			     gen_rtx_REG (word_mode, regno),
  			     GEN_INT (UNITS_PER_WORD * i));
        regno++;
      }
  
    return regs;
  }
  
  /* Used by function_arg and sparc_function_value_1 to implement the conventions
     for passing and returning large (BLKmode) vectors.
     Return an expression valid as a return value for the FUNCTION_ARG
     and TARGET_FUNCTION_VALUE.
  
     SIZE is the size in bytes of the vector (at least 8 bytes).
     REGNO is the FP hard register the vector will be passed in.  */
  
  static rtx
  function_arg_vector_value (int size, int regno)
  {
    int i, nregs = size / 8;
    rtx regs;
  
    regs = gen_rtx_PARALLEL (BLKmode, rtvec_alloc (nregs));
  
    for (i = 0; i < nregs; i++)
      {
        XVECEXP (regs, 0, i)
  	= gen_rtx_EXPR_LIST (VOIDmode,
  			     gen_rtx_REG (DImode, regno + 2*i),
  			     GEN_INT (i*8));
      }
  
    return regs;
  }
  
  /* Determine where to put an argument to a function.
     Value is zero to push the argument on the stack,
     or a hard register in which to store the argument.
  
     CUM is a variable of type CUMULATIVE_ARGS which gives info about
      the preceding args and about the function being called.
     MODE is the argument's machine mode.
     TYPE is the data type of the argument (as a tree).
      This is null for libcalls where that information may
      not be available.
     NAMED is true if this argument is a named parameter
      (otherwise it is an extra parameter matching an ellipsis).
     INCOMING_P is false for TARGET_FUNCTION_ARG, true for
      TARGET_FUNCTION_INCOMING_ARG.  */
  
  static rtx
  sparc_function_arg_1 (cumulative_args_t cum_v, enum machine_mode mode,
  		      const_tree type, bool named, bool incoming_p)
  {
    const CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
  
    int regbase = (incoming_p
  		 ? SPARC_INCOMING_INT_ARG_FIRST
  		 : SPARC_OUTGOING_INT_ARG_FIRST);
    int slotno, regno, padding;
    enum mode_class mclass = GET_MODE_CLASS (mode);
  
    slotno = function_arg_slotno (cum, mode, type, named, incoming_p,
  				&regno, &padding);
    if (slotno == -1)
      return 0;
  
    /* Vector types deserve special treatment because they are polymorphic wrt
       their mode, depending upon whether VIS instructions are enabled.  */
    if (type && TREE_CODE (type) == VECTOR_TYPE)
      {
        HOST_WIDE_INT size = int_size_in_bytes (type);
        gcc_assert ((TARGET_ARCH32 && size <= 8)
  		  || (TARGET_ARCH64 && size <= 16));
  
        if (mode == BLKmode)
  	return function_arg_vector_value (size,
  					  SPARC_FP_ARG_FIRST + 2*slotno);
        else
  	mclass = MODE_FLOAT;
      }
  
    if (TARGET_ARCH32)
      return gen_rtx_REG (mode, regno);
  
    /* Structures up to 16 bytes in size are passed in arg slots on the stack
       and are promoted to registers if possible.  */
    if (type && TREE_CODE (type) == RECORD_TYPE)
      {
        HOST_WIDE_INT size = int_size_in_bytes (type);
        gcc_assert (size <= 16);
  
        return function_arg_record_value (type, mode, slotno, named, regbase);
      }
  
    /* Unions up to 16 bytes in size are passed in integer registers.  */
    else if (type && TREE_CODE (type) == UNION_TYPE)
      {
        HOST_WIDE_INT size = int_size_in_bytes (type);
        gcc_assert (size <= 16);
  
        return function_arg_union_value (size, mode, slotno, regno);
      }
  
    /* v9 fp args in reg slots beyond the int reg slots get passed in regs
       but also have the slot allocated for them.
       If no prototype is in scope fp values in register slots get passed
       in two places, either fp regs and int regs or fp regs and memory.  */
    else if ((mclass == MODE_FLOAT || mclass == MODE_COMPLEX_FLOAT)
  	   && SPARC_FP_REG_P (regno))
      {
        rtx reg = gen_rtx_REG (mode, regno);
        if (cum->prototype_p || cum->libcall_p)
  	{
  	  /* "* 2" because fp reg numbers are recorded in 4 byte
  	     quantities.  */
  #if 0
  	  /* ??? This will cause the value to be passed in the fp reg and
  	     in the stack.  When a prototype exists we want to pass the
  	     value in the reg but reserve space on the stack.  That's an
  	     optimization, and is deferred [for a bit].  */
  	  if ((regno - SPARC_FP_ARG_FIRST) >= SPARC_INT_ARG_MAX * 2)
  	    return gen_rtx_PARALLEL (mode,
  			    gen_rtvec (2,
  				       gen_rtx_EXPR_LIST (VOIDmode,
  						NULL_RTX, const0_rtx),
  				       gen_rtx_EXPR_LIST (VOIDmode,
  						reg, const0_rtx)));
  	  else
  #else
  	  /* ??? It seems that passing back a register even when past
  	     the area declared by REG_PARM_STACK_SPACE will allocate
  	     space appropriately, and will not copy the data onto the
  	     stack, exactly as we desire.
  
  	     This is due to locate_and_pad_parm being called in
  	     expand_call whenever reg_parm_stack_space > 0, which
  	     while beneficial to our example here, would seem to be
  	     in error from what had been intended.  Ho hum...  -- r~ */
  #endif
  	    return reg;
  	}
        else
  	{
  	  rtx v0, v1;
  
  	  if ((regno - SPARC_FP_ARG_FIRST) < SPARC_INT_ARG_MAX * 2)
  	    {
  	      int intreg;
  
  	      /* On incoming, we don't need to know that the value
  		 is passed in %f0 and %i0, and it confuses other parts
  		 causing needless spillage even on the simplest cases.  */
  	      if (incoming_p)
  		return reg;
  
  	      intreg = (SPARC_OUTGOING_INT_ARG_FIRST
  			+ (regno - SPARC_FP_ARG_FIRST) / 2);
  
  	      v0 = gen_rtx_EXPR_LIST (VOIDmode, reg, const0_rtx);
  	      v1 = gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_REG (mode, intreg),
  				      const0_rtx);
  	      return gen_rtx_PARALLEL (mode, gen_rtvec (2, v0, v1));
  	    }
  	  else
  	    {
  	      v0 = gen_rtx_EXPR_LIST (VOIDmode, NULL_RTX, const0_rtx);
  	      v1 = gen_rtx_EXPR_LIST (VOIDmode, reg, const0_rtx);
  	      return gen_rtx_PARALLEL (mode, gen_rtvec (2, v0, v1));
  	    }
  	}
      }
  
    /* All other aggregate types are passed in an integer register in a mode
       corresponding to the size of the type.  */
    else if (type && AGGREGATE_TYPE_P (type))
      {
        HOST_WIDE_INT size = int_size_in_bytes (type);
        gcc_assert (size <= 16);
  
        mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0);
      }
  
    return gen_rtx_REG (mode, regno);
  }
  
  /* Handle the TARGET_FUNCTION_ARG target hook.  */
  
  static rtx
  sparc_function_arg (cumulative_args_t cum, enum machine_mode mode,
  		    const_tree type, bool named)
  {
    return sparc_function_arg_1 (cum, mode, type, named, false);
  }
  
  /* Handle the TARGET_FUNCTION_INCOMING_ARG target hook.  */
  
  static rtx
  sparc_function_incoming_arg (cumulative_args_t cum, enum machine_mode mode,
  			     const_tree type, bool named)
  {
    return sparc_function_arg_1 (cum, mode, type, named, true);
  }
  
  /* For sparc64, objects requiring 16 byte alignment are passed that way.  */
  
  static unsigned int
  sparc_function_arg_boundary (enum machine_mode mode, const_tree type)
  {
    return ((TARGET_ARCH64
  	   && (GET_MODE_ALIGNMENT (mode) == 128
  	       || (type && TYPE_ALIGN (type) == 128)))
  	  ? 128
  	  : PARM_BOUNDARY);
  }
  
  /* For an arg passed partly in registers and partly in memory,
     this is the number of bytes of registers used.
     For args passed entirely in registers or entirely in memory, zero.
  
     Any arg that starts in the first 6 regs but won't entirely fit in them
     needs partial registers on v8.  On v9, structures with integer
     values in arg slots 5,6 will be passed in %o5 and SP+176, and complex fp
     values that begin in the last fp reg [where "last fp reg" varies with the
     mode] will be split between that reg and memory.  */
  
  static int
  sparc_arg_partial_bytes (cumulative_args_t cum, enum machine_mode mode,
  			 tree type, bool named)
  {
    int slotno, regno, padding;
  
    /* We pass false for incoming_p here, it doesn't matter.  */
    slotno = function_arg_slotno (get_cumulative_args (cum), mode, type, named,
  				false, &regno, &padding);
  
    if (slotno == -1)
      return 0;
  
    if (TARGET_ARCH32)
      {
        if ((slotno + (mode == BLKmode
  		     ? ROUND_ADVANCE (int_size_in_bytes (type))
  		     : ROUND_ADVANCE (GET_MODE_SIZE (mode))))
  	  > SPARC_INT_ARG_MAX)
  	return (SPARC_INT_ARG_MAX - slotno) * UNITS_PER_WORD;
      }
    else
      {
        /* We are guaranteed by pass_by_reference that the size of the
  	 argument is not greater than 16 bytes, so we only need to return
  	 one word if the argument is partially passed in registers.  */
  
        if (type && AGGREGATE_TYPE_P (type))
  	{
  	  int size = int_size_in_bytes (type);
  
  	  if (size > UNITS_PER_WORD
  	      && slotno == SPARC_INT_ARG_MAX - 1)
  	    return UNITS_PER_WORD;
  	}
        else if (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT
  	       || (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT
  		   && ! (TARGET_FPU && named)))
  	{
  	  /* The complex types are passed as packed types.  */
  	  if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
  	      && slotno == SPARC_INT_ARG_MAX - 1)
  	    return UNITS_PER_WORD;
  	}
        else if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
  	{
  	  if ((slotno + GET_MODE_SIZE (mode) / UNITS_PER_WORD)
  	      > SPARC_FP_ARG_MAX)
  	    return UNITS_PER_WORD;
  	}
      }
  
    return 0;
  }
  
  /* Handle the TARGET_PASS_BY_REFERENCE target hook.
     Specify whether to pass the argument by reference.  */
  
  static bool
  sparc_pass_by_reference (cumulative_args_t cum ATTRIBUTE_UNUSED,
  			 enum machine_mode mode, const_tree type,
  			 bool named ATTRIBUTE_UNUSED)
  {
    if (TARGET_ARCH32)
      /* Original SPARC 32-bit ABI says that structures and unions,
         and quad-precision floats are passed by reference.  For Pascal,
         also pass arrays by reference.  All other base types are passed
         in registers.
  
         Extended ABI (as implemented by the Sun compiler) says that all
         complex floats are passed by reference.  Pass complex integers
         in registers up to 8 bytes.  More generally, enforce the 2-word
         cap for passing arguments in registers.
  
         Vector ABI (as implemented by the Sun VIS SDK) says that vector
         integers are passed like floats of the same size, that is in
         registers up to 8 bytes.  Pass all vector floats by reference
         like structure and unions.  */
      return ((type && (AGGREGATE_TYPE_P (type) || VECTOR_FLOAT_TYPE_P (type)))
  	    || mode == SCmode
  	    /* Catch CDImode, TFmode, DCmode and TCmode.  */
  	    || GET_MODE_SIZE (mode) > 8
  	    || (type
  		&& TREE_CODE (type) == VECTOR_TYPE
  		&& (unsigned HOST_WIDE_INT) int_size_in_bytes (type) > 8));
    else
      /* Original SPARC 64-bit ABI says that structures and unions
         smaller than 16 bytes are passed in registers, as well as
         all other base types.
  
         Extended ABI (as implemented by the Sun compiler) says that
         complex floats are passed in registers up to 16 bytes.  Pass
         all complex integers in registers up to 16 bytes.  More generally,
         enforce the 2-word cap for passing arguments in registers.
  
         Vector ABI (as implemented by the Sun VIS SDK) says that vector
         integers are passed like floats of the same size, that is in
         registers (up to 16 bytes).  Pass all vector floats like structure
         and unions.  */
      return ((type
  	     && (AGGREGATE_TYPE_P (type) || TREE_CODE (type) == VECTOR_TYPE)
  	     && (unsigned HOST_WIDE_INT) int_size_in_bytes (type) > 16)
  	    /* Catch CTImode and TCmode.  */
  	    || GET_MODE_SIZE (mode) > 16);
  }
  
  /* Handle the TARGET_FUNCTION_ARG_ADVANCE hook.
     Update the data in CUM to advance over an argument
     of mode MODE and data type TYPE.
     TYPE is null for libcalls where that information may not be available.  */
  
  static void
  sparc_function_arg_advance (cumulative_args_t cum_v, enum machine_mode mode,
  			    const_tree type, bool named)
  {
    CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
    int regno, padding;
  
    /* We pass false for incoming_p here, it doesn't matter.  */
    function_arg_slotno (cum, mode, type, named, false, &regno, &padding);
  
    /* If argument requires leading padding, add it.  */
    cum->words += padding;
  
    if (TARGET_ARCH32)
      {
        cum->words += (mode != BLKmode
  		     ? ROUND_ADVANCE (GET_MODE_SIZE (mode))
  		     : ROUND_ADVANCE (int_size_in_bytes (type)));
      }
    else
      {
        if (type && AGGREGATE_TYPE_P (type))
  	{
  	  int size = int_size_in_bytes (type);
  
  	  if (size <= 8)
  	    ++cum->words;
  	  else if (size <= 16)
  	    cum->words += 2;
  	  else /* passed by reference */
  	    ++cum->words;
  	}
        else
  	{
  	  cum->words += (mode != BLKmode
  			 ? ROUND_ADVANCE (GET_MODE_SIZE (mode))
  			 : ROUND_ADVANCE (int_size_in_bytes (type)));
  	}
      }
  }
  
  /* Handle the FUNCTION_ARG_PADDING macro.
     For the 64 bit ABI structs are always stored left shifted in their
     argument slot.  */
  
  enum direction
  function_arg_padding (enum machine_mode mode, const_tree type)
  {
    if (TARGET_ARCH64 && type != 0 && AGGREGATE_TYPE_P (type))
      return upward;
  
    /* Fall back to the default.  */
    return DEFAULT_FUNCTION_ARG_PADDING (mode, type);
  }
  
  /* Handle the TARGET_RETURN_IN_MEMORY target hook.
     Specify whether to return the return value in memory.  */
  
  static bool
  sparc_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED)
  {
    if (TARGET_ARCH32)
      /* Original SPARC 32-bit ABI says that structures and unions,
         and quad-precision floats are returned in memory.  All other
         base types are returned in registers.
  
         Extended ABI (as implemented by the Sun compiler) says that
         all complex floats are returned in registers (8 FP registers
         at most for '_Complex long double').  Return all complex integers
         in registers (4 at most for '_Complex long long').
  
         Vector ABI (as implemented by the Sun VIS SDK) says that vector
         integers are returned like floats of the same size, that is in
         registers up to 8 bytes and in memory otherwise.  Return all
         vector floats in memory like structure and unions; note that
         they always have BLKmode like the latter.  */
      return (TYPE_MODE (type) == BLKmode
  	    || TYPE_MODE (type) == TFmode
  	    || (TREE_CODE (type) == VECTOR_TYPE
  		&& (unsigned HOST_WIDE_INT) int_size_in_bytes (type) > 8));
    else
      /* Original SPARC 64-bit ABI says that structures and unions
         smaller than 32 bytes are returned in registers, as well as
         all other base types.
  
         Extended ABI (as implemented by the Sun compiler) says that all
         complex floats are returned in registers (8 FP registers at most
         for '_Complex long double').  Return all complex integers in
         registers (4 at most for '_Complex TItype').
  
         Vector ABI (as implemented by the Sun VIS SDK) says that vector
         integers are returned like floats of the same size, that is in
         registers.  Return all vector floats like structure and unions;
         note that they always have BLKmode like the latter.  */
      return (TYPE_MODE (type) == BLKmode
  	    && (unsigned HOST_WIDE_INT) int_size_in_bytes (type) > 32);
  }
  
  /* Handle the TARGET_STRUCT_VALUE target hook.
     Return where to find the structure return value address.  */
  
  static rtx
  sparc_struct_value_rtx (tree fndecl, int incoming)
  {
    if (TARGET_ARCH64)
      return 0;
    else
      {
        rtx mem;
  
        if (incoming)
  	mem = gen_frame_mem (Pmode, plus_constant (frame_pointer_rtx,
  						   STRUCT_VALUE_OFFSET));
        else
  	mem = gen_frame_mem (Pmode, plus_constant (stack_pointer_rtx,
  						   STRUCT_VALUE_OFFSET));
  
        /* Only follow the SPARC ABI for fixed-size structure returns.
           Variable size structure returns are handled per the normal
           procedures in GCC. This is enabled by -mstd-struct-return */
        if (incoming == 2
  	  && sparc_std_struct_return
  	  && TYPE_SIZE_UNIT (TREE_TYPE (fndecl))
  	  && TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (fndecl))) == INTEGER_CST)
  	{
  	  /* We must check and adjust the return address, as it is
  	     optional as to whether the return object is really
  	     provided.  */
  	  rtx ret_reg = gen_rtx_REG (Pmode, 31);
  	  rtx scratch = gen_reg_rtx (SImode);
  	  rtx endlab = gen_label_rtx ();
  
  	  /* Calculate the return object size */
  	  tree size = TYPE_SIZE_UNIT (TREE_TYPE (fndecl));
  	  rtx size_rtx = GEN_INT (TREE_INT_CST_LOW (size) & 0xfff);
  	  /* Construct a temporary return value */
  	  rtx temp_val
  	    = assign_stack_local (Pmode, TREE_INT_CST_LOW (size), 0);
  
  	  /* Implement SPARC 32-bit psABI callee return struct checking:
  
  	     Fetch the instruction where we will return to and see if
  	     it's an unimp instruction (the most significant 10 bits
  	     will be zero).  */
  	  emit_move_insn (scratch, gen_rtx_MEM (SImode,
  						plus_constant (ret_reg, 8)));
  	  /* Assume the size is valid and pre-adjust */
  	  emit_insn (gen_add3_insn (ret_reg, ret_reg, GEN_INT (4)));
  	  emit_cmp_and_jump_insns (scratch, size_rtx, EQ, const0_rtx, SImode,
  				   0, endlab);
  	  emit_insn (gen_sub3_insn (ret_reg, ret_reg, GEN_INT (4)));
  	  /* Write the address of the memory pointed to by temp_val into
  	     the memory pointed to by mem */
  	  emit_move_insn (mem, XEXP (temp_val, 0));
  	  emit_label (endlab);
  	}
  
        return mem;
      }
  }
  
  /* Handle TARGET_FUNCTION_VALUE, and TARGET_LIBCALL_VALUE target hook.
     For v9, function return values are subject to the same rules as arguments,
     except that up to 32 bytes may be returned in registers.  */
  
  static rtx
  sparc_function_value_1 (const_tree type, enum machine_mode mode,
  			bool outgoing)
  {
    /* Beware that the two values are swapped here wrt function_arg.  */
    int regbase = (outgoing
  		 ? SPARC_INCOMING_INT_ARG_FIRST
  		 : SPARC_OUTGOING_INT_ARG_FIRST);
    enum mode_class mclass = GET_MODE_CLASS (mode);
    int regno;
  
    /* Vector types deserve special treatment because they are polymorphic wrt
       their mode, depending upon whether VIS instructions are enabled.  */
    if (type && TREE_CODE (type) == VECTOR_TYPE)
      {
        HOST_WIDE_INT size = int_size_in_bytes (type);
        gcc_assert ((TARGET_ARCH32 && size <= 8)
  		  || (TARGET_ARCH64 && size <= 32));
  
        if (mode == BLKmode)
  	return function_arg_vector_value (size,
  					  SPARC_FP_ARG_FIRST);
        else
  	mclass = MODE_FLOAT;
      }
  
    if (TARGET_ARCH64 && type)
      {
        /* Structures up to 32 bytes in size are returned in registers.  */
        if (TREE_CODE (type) == RECORD_TYPE)
  	{
  	  HOST_WIDE_INT size = int_size_in_bytes (type);
  	  gcc_assert (size <= 32);
  
  	  return function_arg_record_value (type, mode, 0, 1, regbase);
  	}
  
        /* Unions up to 32 bytes in size are returned in integer registers.  */
        else if (TREE_CODE (type) == UNION_TYPE)
  	{
  	  HOST_WIDE_INT size = int_size_in_bytes (type);
  	  gcc_assert (size <= 32);
  
  	  return function_arg_union_value (size, mode, 0, regbase);
  	}
  
        /* Objects that require it are returned in FP registers.  */
        else if (mclass == MODE_FLOAT || mclass == MODE_COMPLEX_FLOAT)
  	;
  
        /* All other aggregate types are returned in an integer register in a
  	 mode corresponding to the size of the type.  */
        else if (AGGREGATE_TYPE_P (type))
  	{
  	  /* All other aggregate types are passed in an integer register
  	     in a mode corresponding to the size of the type.  */
  	  HOST_WIDE_INT size = int_size_in_bytes (type);
  	  gcc_assert (size <= 32);
  
  	  mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0);
  
  	  /* ??? We probably should have made the same ABI change in
  	     3.4.0 as the one we made for unions.   The latter was
  	     required by the SCD though, while the former is not
  	     specified, so we favored compatibility and efficiency.
  
  	     Now we're stuck for aggregates larger than 16 bytes,
  	     because OImode vanished in the meantime.  Let's not
  	     try to be unduly clever, and simply follow the ABI
  	     for unions in that case.  */
  	  if (mode == BLKmode)
  	    return function_arg_union_value (size, mode, 0, regbase);
  	  else
  	    mclass = MODE_INT;
  	}
  
        /* We should only have pointer and integer types at this point.  This
  	 must match sparc_promote_function_mode.  */
        else if (mclass == MODE_INT && GET_MODE_SIZE (mode) < UNITS_PER_WORD)
  	mode = word_mode;
      }
  
    /* We should only have pointer and integer types at this point.  This must
       match sparc_promote_function_mode.  */
    else if (TARGET_ARCH32
  	   && mclass == MODE_INT
  	   && GET_MODE_SIZE (mode) < UNITS_PER_WORD)
      mode = word_mode;
  
    if ((mclass == MODE_FLOAT || mclass == MODE_COMPLEX_FLOAT) && TARGET_FPU)
      regno = SPARC_FP_ARG_FIRST;
    else
      regno = regbase;
  
    return gen_rtx_REG (mode, regno);
  }
  
  /* Handle TARGET_FUNCTION_VALUE.
     On the SPARC, the value is found in the first "output" register, but the
     called function leaves it in the first "input" register.  */
  
  static rtx
  sparc_function_value (const_tree valtype,
  		      const_tree fn_decl_or_type ATTRIBUTE_UNUSED,
  		      bool outgoing)
  {
    return sparc_function_value_1 (valtype, TYPE_MODE (valtype), outgoing);
  }
  
  /* Handle TARGET_LIBCALL_VALUE.  */
  
  static rtx
  sparc_libcall_value (enum machine_mode mode,
  		     const_rtx fun ATTRIBUTE_UNUSED)
  {
    return sparc_function_value_1 (NULL_TREE, mode, false);
  }
  
  /* Handle FUNCTION_VALUE_REGNO_P.
     On the SPARC, the first "output" reg is used for integer values, and the
     first floating point register is used for floating point values.  */
  
  static bool
  sparc_function_value_regno_p (const unsigned int regno)
  {
    return (regno == 8 || regno == 32);
  }
  
  /* Do what is necessary for `va_start'.  We look at the current function
     to determine if stdarg or varargs is used and return the address of
     the first unnamed parameter.  */
  
  static rtx
  sparc_builtin_saveregs (void)
  {
    int first_reg = crtl->args.info.words;
    rtx address;
    int regno;
  
    for (regno = first_reg; regno < SPARC_INT_ARG_MAX; regno++)
      emit_move_insn (gen_rtx_MEM (word_mode,
  				 gen_rtx_PLUS (Pmode,
  					       frame_pointer_rtx,
  					       GEN_INT (FIRST_PARM_OFFSET (0)
  							+ (UNITS_PER_WORD
  							   * regno)))),
  		    gen_rtx_REG (word_mode,
  				 SPARC_INCOMING_INT_ARG_FIRST + regno));
  
    address = gen_rtx_PLUS (Pmode,
  			  frame_pointer_rtx,
  			  GEN_INT (FIRST_PARM_OFFSET (0)
  				   + UNITS_PER_WORD * first_reg));
  
    return address;
  }
  
  /* Implement `va_start' for stdarg.  */
  
  static void
  sparc_va_start (tree valist, rtx nextarg)
  {
    nextarg = expand_builtin_saveregs ();
    std_expand_builtin_va_start (valist, nextarg);
  }
  
  /* Implement `va_arg' for stdarg.  */
  
  static tree
  sparc_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
  		       gimple_seq *post_p)
  {
    HOST_WIDE_INT size, rsize, align;
    tree addr, incr;
    bool indirect;
    tree ptrtype = build_pointer_type (type);
  
    if (pass_by_reference (NULL, TYPE_MODE (type), type, false))
      {
        indirect = true;
        size = rsize = UNITS_PER_WORD;
        align = 0;
      }
    else
      {
        indirect = false;
        size = int_size_in_bytes (type);
        rsize = (size + UNITS_PER_WORD - 1) & -UNITS_PER_WORD;
        align = 0;
  
        if (TARGET_ARCH64)
  	{
  	  /* For SPARC64, objects requiring 16-byte alignment get it.  */
  	  if (TYPE_ALIGN (type) >= 2 * (unsigned) BITS_PER_WORD)
  	    align = 2 * UNITS_PER_WORD;
  
  	  /* SPARC-V9 ABI states that structures up to 16 bytes in size
  	     are left-justified in their slots.  */
  	  if (AGGREGATE_TYPE_P (type))
  	    {
  	      if (size == 0)
  		size = rsize = UNITS_PER_WORD;
  	      else
  		size = rsize;
  	    }
  	}
      }
  
    incr = valist;
    if (align)
      {
        incr = fold_build_pointer_plus_hwi (incr, align - 1);
        incr = fold_convert (sizetype, incr);
        incr = fold_build2 (BIT_AND_EXPR, sizetype, incr,
  			  size_int (-align));
        incr = fold_convert (ptr_type_node, incr);
      }
  
    gimplify_expr (&incr, pre_p, post_p, is_gimple_val, fb_rvalue);
    addr = incr;
  
    if (BYTES_BIG_ENDIAN && size < rsize)
      addr = fold_build_pointer_plus_hwi (incr, rsize - size);
  
    if (indirect)
      {
        addr = fold_convert (build_pointer_type (ptrtype), addr);
        addr = build_va_arg_indirect_ref (addr);
      }
  
    /* If the address isn't aligned properly for the type, we need a temporary.
       FIXME: This is inefficient, usually we can do this in registers.  */
    else if (align == 0 && TYPE_ALIGN (type) > BITS_PER_WORD)
      {
        tree tmp = create_tmp_var (type, "va_arg_tmp");
        tree dest_addr = build_fold_addr_expr (tmp);
        tree copy = build_call_expr (builtin_decl_implicit (BUILT_IN_MEMCPY),
  				   3, dest_addr, addr, size_int (rsize));
        TREE_ADDRESSABLE (tmp) = 1;
        gimplify_and_add (copy, pre_p);
        addr = dest_addr;
      }
  
    else
      addr = fold_convert (ptrtype, addr);
  
    incr = fold_build_pointer_plus_hwi (incr, rsize);
    gimplify_assign (valist, incr, post_p);
  
    return build_va_arg_indirect_ref (addr);
  }
  
  /* Implement the TARGET_VECTOR_MODE_SUPPORTED_P target hook.
     Specify whether the vector mode is supported by the hardware.  */
  
  static bool
  sparc_vector_mode_supported_p (enum machine_mode mode)
  {
    return TARGET_VIS && VECTOR_MODE_P (mode) ? true : false;
  }
  
  /* Implement the TARGET_VECTORIZE_PREFERRED_SIMD_MODE target hook.  */
  
  static enum machine_mode
  sparc_preferred_simd_mode (enum machine_mode mode)
  {
    if (TARGET_VIS)
      switch (mode)
        {
        case SImode:
  	return V2SImode;
        case HImode:
  	return V4HImode;
        case QImode:
  	return V8QImode;
  
        default:;
        }
  
    return word_mode;
  }
  
  /* Return the string to output an unconditional branch to LABEL, which is
     the operand number of the label.
  
     DEST is the destination insn (i.e. the label), INSN is the source.  */
  
  const char *
  output_ubranch (rtx dest, int label, rtx insn)
  {
    static char string[64];
    bool v9_form = false;
    char *p;
  
    if (TARGET_V9 && INSN_ADDRESSES_SET_P ())
      {
        int delta = (INSN_ADDRESSES (INSN_UID (dest))
  		   - INSN_ADDRESSES (INSN_UID (insn)));
        /* Leave some instructions for "slop".  */
        if (delta >= -260000 && delta < 260000)
  	v9_form = true;
      }
  
    if (v9_form)
      strcpy (string, "ba%*,pt\t%%xcc, ");
    else
      strcpy (string, "b%*\t");
  
    p = strchr (string, '\0');
    *p++ = '%';
    *p++ = 'l';
    *p++ = '0' + label;
    *p++ = '%';
    *p++ = '(';
    *p = '\0';
  
    return string;
  }
  
  /* Return the string to output a conditional branch to LABEL, which is
     the operand number of the label.  OP is the conditional expression.
     XEXP (OP, 0) is assumed to be a condition code register (integer or
     floating point) and its mode specifies what kind of comparison we made.
  
     DEST is the destination insn (i.e. the label), INSN is the source.
  
     REVERSED is nonzero if we should reverse the sense of the comparison.
  
     ANNUL is nonzero if we should generate an annulling branch.  */
  
  const char *
  output_cbranch (rtx op, rtx dest, int label, int reversed, int annul,
  		rtx insn)
  {
    static char string[64];
    enum rtx_code code = GET_CODE (op);
    rtx cc_reg = XEXP (op, 0);
    enum machine_mode mode = GET_MODE (cc_reg);
    const char *labelno, *branch;
    int spaces = 8, far;
    char *p;
  
    /* v9 branches are limited to +-1MB.  If it is too far away,
       change
  
       bne,pt %xcc, .LC30
  
       to
  
       be,pn %xcc, .+12
        nop
       ba .LC30
  
       and
  
       fbne,a,pn %fcc2, .LC29
  
       to
  
       fbe,pt %fcc2, .+16
        nop
       ba .LC29  */
  
    far = TARGET_V9 && (get_attr_length (insn) >= 3);
    if (reversed ^ far)
      {
        /* Reversal of FP compares takes care -- an ordered compare
  	 becomes an unordered compare and vice versa.  */
        if (mode == CCFPmode || mode == CCFPEmode)
  	code = reverse_condition_maybe_unordered (code);
        else
  	code = reverse_condition (code);
      }
  
    /* Start by writing the branch condition.  */
    if (mode == CCFPmode || mode == CCFPEmode)
      {
        switch (code)
  	{
  	case NE:
  	  branch = "fbne";
  	  break;
  	case EQ:
  	  branch = "fbe";
  	  break;
  	case GE:
  	  branch = "fbge";
  	  break;
  	case GT:
  	  branch = "fbg";
  	  break;
  	case LE:
  	  branch = "fble";
  	  break;
  	case LT:
  	  branch = "fbl";
  	  break;
  	case UNORDERED:
  	  branch = "fbu";
  	  break;
  	case ORDERED:
  	  branch = "fbo";
  	  break;
  	case UNGT:
  	  branch = "fbug";
  	  break;
  	case UNLT:
  	  branch = "fbul";
  	  break;
  	case UNEQ:
  	  branch = "fbue";
  	  break;
  	case UNGE:
  	  branch = "fbuge";
  	  break;
  	case UNLE:
  	  branch = "fbule";
  	  break;
  	case LTGT:
  	  branch = "fblg";
  	  break;
  
  	default:
  	  gcc_unreachable ();
  	}
  
        /* ??? !v9: FP branches cannot be preceded by another floating point
  	 insn.  Because there is currently no concept of pre-delay slots,
  	 we can fix this only by always emitting a nop before a floating
  	 point branch.  */
  
        string[0] = '\0';
        if (! TARGET_V9)
  	strcpy (string, "nop\n\t");
        strcat (string, branch);
      }
    else
      {
        switch (code)
  	{
  	case NE:
  	  branch = "bne";
  	  break;
  	case EQ:
  	  branch = "be";
  	  break;
  	case GE:
  	  if (mode == CC_NOOVmode || mode == CCX_NOOVmode)
  	    branch = "bpos";
  	  else
  	    branch = "bge";
  	  break;
  	case GT:
  	  branch = "bg";
  	  break;
  	case LE:
  	  branch = "ble";
  	  break;
  	case LT:
  	  if (mode == CC_NOOVmode || mode == CCX_NOOVmode)
  	    branch = "bneg";
  	  else
  	    branch = "bl";
  	  break;
  	case GEU:
  	  branch = "bgeu";
  	  break;
  	case GTU:
  	  branch = "bgu";
  	  break;
  	case LEU:
  	  branch = "bleu";
  	  break;
  	case LTU:
  	  branch = "blu";
  	  break;
  
  	default:
  	  gcc_unreachable ();
  	}
        strcpy (string, branch);
      }
    spaces -= strlen (branch);
    p = strchr (string, '\0');
  
    /* Now add the annulling, the label, and a possible noop.  */
    if (annul && ! far)
      {
        strcpy (p, ",a");
        p += 2;
        spaces -= 2;
      }
  
    if (TARGET_V9)
      {
        rtx note;
        int v8 = 0;
  
        if (! far && insn && INSN_ADDRESSES_SET_P ())
  	{
  	  int delta = (INSN_ADDRESSES (INSN_UID (dest))
  		       - INSN_ADDRESSES (INSN_UID (insn)));
  	  /* Leave some instructions for "slop".  */
  	  if (delta < -260000 || delta >= 260000)
  	    v8 = 1;
  	}
  
        if (mode == CCFPmode || mode == CCFPEmode)
  	{
  	  static char v9_fcc_labelno[] = "%%fccX, ";
  	  /* Set the char indicating the number of the fcc reg to use.  */
  	  v9_fcc_labelno[5] = REGNO (cc_reg) - SPARC_FIRST_V9_FCC_REG + '0';
  	  labelno = v9_fcc_labelno;
  	  if (v8)
  	    {
  	      gcc_assert (REGNO (cc_reg) == SPARC_FCC_REG);
  	      labelno = "";
  	    }
  	}
        else if (mode == CCXmode || mode == CCX_NOOVmode)
  	{
  	  labelno = "%%xcc, ";
  	  gcc_assert (! v8);
  	}
        else
  	{
  	  labelno = "%%icc, ";
  	  if (v8)
  	    labelno = "";
  	}
  
        if (*labelno && insn && (note = find_reg_note (insn, REG_BR_PROB, NULL_RTX)))
  	{
  	  strcpy (p,
  		  ((INTVAL (XEXP (note, 0)) >= REG_BR_PROB_BASE / 2) ^ far)
  		  ? ",pt" : ",pn");
  	  p += 3;
  	  spaces -= 3;
  	}
      }
    else
      labelno = "";
  
    if (spaces > 0)
      *p++ = '\t';
    else
      *p++ = ' ';
    strcpy (p, labelno);
    p = strchr (p, '\0');
    if (far)
      {
        strcpy (p, ".+12\n\t nop\n\tb\t");
        /* Skip the next insn if requested or
  	 if we know that it will be a nop.  */
        if (annul || ! final_sequence)
          p[3] = '6';
        p += 14;
      }
    *p++ = '%';
    *p++ = 'l';
    *p++ = label + '0';
    *p++ = '%';
    *p++ = '#';
    *p = '\0';
  
    return string;
  }
  
  /* Emit a library call comparison between floating point X and Y.
     COMPARISON is the operator to compare with (EQ, NE, GT, etc).
     Return the new operator to be used in the comparison sequence.
  
     TARGET_ARCH64 uses _Qp_* functions, which use pointers to TFmode
     values as arguments instead of the TFmode registers themselves,
     that's why we cannot call emit_float_lib_cmp.  */
  
  rtx
  sparc_emit_float_lib_cmp (rtx x, rtx y, enum rtx_code comparison)
  {
    const char *qpfunc;
    rtx slot0, slot1, result, tem, tem2, libfunc;
    enum machine_mode mode;
    enum rtx_code new_comparison;
  
    switch (comparison)
      {
      case EQ:
        qpfunc = (TARGET_ARCH64 ? "_Qp_feq" : "_Q_feq");
        break;
  
      case NE:
        qpfunc = (TARGET_ARCH64 ? "_Qp_fne" : "_Q_fne");
        break;
  
      case GT:
        qpfunc = (TARGET_ARCH64 ? "_Qp_fgt" : "_Q_fgt");
        break;
  
      case GE:
        qpfunc = (TARGET_ARCH64 ? "_Qp_fge" : "_Q_fge");
        break;
  
      case LT:
        qpfunc = (TARGET_ARCH64 ? "_Qp_flt" : "_Q_flt");
        break;
  
      case LE:
        qpfunc = (TARGET_ARCH64 ? "_Qp_fle" : "_Q_fle");
        break;
  
      case ORDERED:
      case UNORDERED:
      case UNGT:
      case UNLT:
      case UNEQ:
      case UNGE:
      case UNLE:
      case LTGT:
        qpfunc = (TARGET_ARCH64 ? "_Qp_cmp" : "_Q_cmp");
        break;
  
      default:
        gcc_unreachable ();
      }
  
    if (TARGET_ARCH64)
      {
        if (MEM_P (x))
  	{
  	  tree expr = MEM_EXPR (x);
  	  if (expr)
  	    mark_addressable (expr);
  	  slot0 = x;
  	}
        else
  	{
  	  slot0 = assign_stack_temp (TFmode, GET_MODE_SIZE(TFmode), 0);
  	  emit_move_insn (slot0, x);
  	}
  
        if (MEM_P (y))
  	{
  	  tree expr = MEM_EXPR (y);
  	  if (expr)
  	    mark_addressable (expr);
  	  slot1 = y;
  	}
        else
  	{
  	  slot1 = assign_stack_temp (TFmode, GET_MODE_SIZE(TFmode), 0);
  	  emit_move_insn (slot1, y);
  	}
  
        libfunc = gen_rtx_SYMBOL_REF (Pmode, qpfunc);
        emit_library_call (libfunc, LCT_NORMAL,
  			 DImode, 2,
  			 XEXP (slot0, 0), Pmode,
  			 XEXP (slot1, 0), Pmode);
        mode = DImode;
      }
    else
      {
        libfunc = gen_rtx_SYMBOL_REF (Pmode, qpfunc);
        emit_library_call (libfunc, LCT_NORMAL,
  			 SImode, 2,
  			 x, TFmode, y, TFmode);
        mode = SImode;
      }
  
  
    /* Immediately move the result of the libcall into a pseudo
       register so reload doesn't clobber the value if it needs
       the return register for a spill reg.  */
    result = gen_reg_rtx (mode);
    emit_move_insn (result, hard_libcall_value (mode, libfunc));
  
    switch (comparison)
      {
      default:
        return gen_rtx_NE (VOIDmode, result, const0_rtx);
      case ORDERED:
      case UNORDERED:
        new_comparison = (comparison == UNORDERED ? EQ : NE);
        return gen_rtx_fmt_ee (new_comparison, VOIDmode, result, GEN_INT(3));
      case UNGT:
      case UNGE:
        new_comparison = (comparison == UNGT ? GT : NE);
        return gen_rtx_fmt_ee (new_comparison, VOIDmode, result, const1_rtx);
      case UNLE:
        return gen_rtx_NE (VOIDmode, result, const2_rtx);
      case UNLT:
        tem = gen_reg_rtx (mode);
        if (TARGET_ARCH32)
  	emit_insn (gen_andsi3 (tem, result, const1_rtx));
        else
  	emit_insn (gen_anddi3 (tem, result, const1_rtx));
        return gen_rtx_NE (VOIDmode, tem, const0_rtx);
      case UNEQ:
      case LTGT:
        tem = gen_reg_rtx (mode);
        if (TARGET_ARCH32)
  	emit_insn (gen_addsi3 (tem, result, const1_rtx));
        else
  	emit_insn (gen_adddi3 (tem, result, const1_rtx));
        tem2 = gen_reg_rtx (mode);
        if (TARGET_ARCH32)
  	emit_insn (gen_andsi3 (tem2, tem, const2_rtx));
        else
  	emit_insn (gen_anddi3 (tem2, tem, const2_rtx));
        new_comparison = (comparison == UNEQ ? EQ : NE);
        return gen_rtx_fmt_ee (new_comparison, VOIDmode, tem2, const0_rtx);
      }
  
    gcc_unreachable ();
  }
  
  /* Generate an unsigned DImode to FP conversion.  This is the same code
     optabs would emit if we didn't have TFmode patterns.  */
  
  void
  sparc_emit_floatunsdi (rtx *operands, enum machine_mode mode)
  {
    rtx neglab, donelab, i0, i1, f0, in, out;
  
    out = operands[0];
    in = force_reg (DImode, operands[1]);
    neglab = gen_label_rtx ();
    donelab = gen_label_rtx ();
    i0 = gen_reg_rtx (DImode);
    i1 = gen_reg_rtx (DImode);
    f0 = gen_reg_rtx (mode);
  
    emit_cmp_and_jump_insns (in, const0_rtx, LT, const0_rtx, DImode, 0, neglab);
  
    emit_insn (gen_rtx_SET (VOIDmode, out, gen_rtx_FLOAT (mode, in)));
    emit_jump_insn (gen_jump (donelab));
    emit_barrier ();
  
    emit_label (neglab);
  
    emit_insn (gen_lshrdi3 (i0, in, const1_rtx));
    emit_insn (gen_anddi3 (i1, in, const1_rtx));
    emit_insn (gen_iordi3 (i0, i0, i1));
    emit_insn (gen_rtx_SET (VOIDmode, f0, gen_rtx_FLOAT (mode, i0)));
    emit_insn (gen_rtx_SET (VOIDmode, out, gen_rtx_PLUS (mode, f0, f0)));
  
    emit_label (donelab);
  }
  
  /* Generate an FP to unsigned DImode conversion.  This is the same code
     optabs would emit if we didn't have TFmode patterns.  */
  
  void
  sparc_emit_fixunsdi (rtx *operands, enum machine_mode mode)
  {
    rtx neglab, donelab, i0, i1, f0, in, out, limit;
  
    out = operands[0];
    in = force_reg (mode, operands[1]);
    neglab = gen_label_rtx ();
    donelab = gen_label_rtx ();
    i0 = gen_reg_rtx (DImode);
    i1 = gen_reg_rtx (DImode);
    limit = gen_reg_rtx (mode);
    f0 = gen_reg_rtx (mode);
  
    emit_move_insn (limit,
  		  CONST_DOUBLE_FROM_REAL_VALUE (
  		    REAL_VALUE_ATOF ("9223372036854775808.0", mode), mode));
    emit_cmp_and_jump_insns (in, limit, GE, NULL_RTX, mode, 0, neglab);
  
    emit_insn (gen_rtx_SET (VOIDmode,
  			  out,
  			  gen_rtx_FIX (DImode, gen_rtx_FIX (mode, in))));
    emit_jump_insn (gen_jump (donelab));
    emit_barrier ();
  
    emit_label (neglab);
  
    emit_insn (gen_rtx_SET (VOIDmode, f0, gen_rtx_MINUS (mode, in, limit)));
    emit_insn (gen_rtx_SET (VOIDmode,
  			  i0,
  			  gen_rtx_FIX (DImode, gen_rtx_FIX (mode, f0))));
    emit_insn (gen_movdi (i1, const1_rtx));
    emit_insn (gen_ashldi3 (i1, i1, GEN_INT (63)));
    emit_insn (gen_xordi3 (out, i0, i1));
  
    emit_label (donelab);
  }
  
  /* Return the string to output a conditional branch to LABEL, testing
     register REG.  LABEL is the operand number of the label; REG is the
     operand number of the reg.  OP is the conditional expression.  The mode
     of REG says what kind of comparison we made.
  
     DEST is the destination insn (i.e. the label), INSN is the source.
  
     REVERSED is nonzero if we should reverse the sense of the comparison.
  
     ANNUL is nonzero if we should generate an annulling branch.  */
  
  const char *
  output_v9branch (rtx op, rtx dest, int reg, int label, int reversed,
  		 int annul, rtx insn)
  {
    static char string[64];
    enum rtx_code code = GET_CODE (op);
    enum machine_mode mode = GET_MODE (XEXP (op, 0));
    rtx note;
    int far;
    char *p;
  
    /* branch on register are limited to +-128KB.  If it is too far away,
       change
  
       brnz,pt %g1, .LC30
  
       to
  
       brz,pn %g1, .+12
        nop
       ba,pt %xcc, .LC30
  
       and
  
       brgez,a,pn %o1, .LC29
  
       to
  
       brlz,pt %o1, .+16
        nop
       ba,pt %xcc, .LC29  */
  
    far = get_attr_length (insn) >= 3;
  
    /* If not floating-point or if EQ or NE, we can just reverse the code.  */
    if (reversed ^ far)
      code = reverse_condition (code);
  
    /* Only 64 bit versions of these instructions exist.  */
    gcc_assert (mode == DImode);
  
    /* Start by writing the branch condition.  */
  
    switch (code)
      {
      case NE:
        strcpy (string, "brnz");
        break;
  
      case EQ:
        strcpy (string, "brz");
        break;
  
      case GE:
        strcpy (string, "brgez");
        break;
  
      case LT:
        strcpy (string, "brlz");
        break;
  
      case LE:
        strcpy (string, "brlez");
        break;
  
      case GT:
        strcpy (string, "brgz");
        break;
  
      default:
        gcc_unreachable ();
      }
  
    p = strchr (string, '\0');
  
    /* Now add the annulling, reg, label, and nop.  */
    if (annul && ! far)
      {
        strcpy (p, ",a");
        p += 2;
      }
  
    if (insn && (note = find_reg_note (insn, REG_BR_PROB, NULL_RTX)))
      {
        strcpy (p,
  	      ((INTVAL (XEXP (note, 0)) >= REG_BR_PROB_BASE / 2) ^ far)
  	      ? ",pt" : ",pn");
        p += 3;
      }
  
    *p = p < string + 8 ? '\t' : ' ';
    p++;
    *p++ = '%';
    *p++ = '0' + reg;
    *p++ = ',';
    *p++ = ' ';
    if (far)
      {
        int veryfar = 1, delta;
  
        if (INSN_ADDRESSES_SET_P ())
  	{
  	  delta = (INSN_ADDRESSES (INSN_UID (dest))
  		   - INSN_ADDRESSES (INSN_UID (insn)));
  	  /* Leave some instructions for "slop".  */
  	  if (delta >= -260000 && delta < 260000)
  	    veryfar = 0;
  	}
  
        strcpy (p, ".+12\n\t nop\n\t");
        /* Skip the next insn if requested or
  	 if we know that it will be a nop.  */
        if (annul || ! final_sequence)
          p[3] = '6';
        p += 12;
        if (veryfar)
  	{
  	  strcpy (p, "b\t");
  	  p += 2;
  	}
        else
  	{
  	  strcpy (p, "ba,pt\t%%xcc, ");
  	  p += 13;
  	}
      }
    *p++ = '%';
    *p++ = 'l';
    *p++ = '0' + label;
    *p++ = '%';
    *p++ = '#';
    *p = '\0';
  
    return string;
  }
  
  /* Return 1, if any of the registers of the instruction are %l[0-7] or %o[0-7].
     Such instructions cannot be used in the delay slot of return insn on v9.
     If TEST is 0, also rename all %i[0-7] registers to their %o[0-7] counterparts.
   */
  
  static int
  epilogue_renumber (register rtx *where, int test)
  {
    register const char *fmt;
    register int i;
    register enum rtx_code code;
  
    if (*where == 0)
      return 0;
  
    code = GET_CODE (*where);
  
    switch (code)
      {
      case REG:
        if (REGNO (*where) >= 8 && REGNO (*where) < 24)      /* oX or lX */
  	return 1;
        if (! test && REGNO (*where) >= 24 && REGNO (*where) < 32)
  	*where = gen_rtx_REG (GET_MODE (*where), OUTGOING_REGNO (REGNO(*where)));
      case SCRATCH:
      case CC0:
      case PC:
      case CONST_INT:
      case CONST_DOUBLE:
        return 0;
  
        /* Do not replace the frame pointer with the stack pointer because
  	 it can cause the delayed instruction to load below the stack.
  	 This occurs when instructions like:
  
  	 (set (reg/i:SI 24 %i0)
  	     (mem/f:SI (plus:SI (reg/f:SI 30 %fp)
                         (const_int -20 [0xffffffec])) 0))
  
  	 are in the return delayed slot.  */
      case PLUS:
        if (GET_CODE (XEXP (*where, 0)) == REG
  	  && REGNO (XEXP (*where, 0)) == HARD_FRAME_POINTER_REGNUM
  	  && (GET_CODE (XEXP (*where, 1)) != CONST_INT
  	      || INTVAL (XEXP (*where, 1)) < SPARC_STACK_BIAS))
  	return 1;
        break;
  
      case MEM:
        if (SPARC_STACK_BIAS
  	  && GET_CODE (XEXP (*where, 0)) == REG
  	  && REGNO (XEXP (*where, 0)) == HARD_FRAME_POINTER_REGNUM)
  	return 1;
        break;
  
      default:
        break;
      }
  
    fmt = GET_RTX_FORMAT (code);
  
    for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
      {
        if (fmt[i] == 'E')
  	{
  	  register int j;
  	  for (j = XVECLEN (*where, i) - 1; j >= 0; j--)
  	    if (epilogue_renumber (&(XVECEXP (*where, i, j)), test))
  	      return 1;
  	}
        else if (fmt[i] == 'e'
  	       && epilogue_renumber (&(XEXP (*where, i)), test))
  	return 1;
      }
    return 0;
  }
  
  /* Leaf functions and non-leaf functions have different needs.  */
  
  static const int
  reg_leaf_alloc_order[] = REG_LEAF_ALLOC_ORDER;
  
  static const int
  reg_nonleaf_alloc_order[] = REG_ALLOC_ORDER;
  
  static const int *const reg_alloc_orders[] = {
    reg_leaf_alloc_order,
    reg_nonleaf_alloc_order};
  
  void
  order_regs_for_local_alloc (void)
  {
    static int last_order_nonleaf = 1;
  
    if (df_regs_ever_live_p (15) != last_order_nonleaf)
      {
        last_order_nonleaf = !last_order_nonleaf;
        memcpy ((char *) reg_alloc_order,
  	      (const char *) reg_alloc_orders[last_order_nonleaf],
  	      FIRST_PSEUDO_REGISTER * sizeof (int));
      }
  }
  
  /* Return 1 if REG and MEM are legitimate enough to allow the various
     mem<-->reg splits to be run.  */
  
  int
  sparc_splitdi_legitimate (rtx reg, rtx mem)
  {
    /* Punt if we are here by mistake.  */
    gcc_assert (reload_completed);
  
    /* We must have an offsettable memory reference.  */
    if (! offsettable_memref_p (mem))
      return 0;
  
    /* If we have legitimate args for ldd/std, we do not want
       the split to happen.  */
    if ((REGNO (reg) % 2) == 0
        && mem_min_alignment (mem, 8))
      return 0;
  
    /* Success.  */
    return 1;
  }
  
  /* Like sparc_splitdi_legitimate but for REG <--> REG moves.  */
  
  int
  sparc_split_regreg_legitimate (rtx reg1, rtx reg2)
  {
    int regno1, regno2;
  
    if (GET_CODE (reg1) == SUBREG)
      reg1 = SUBREG_REG (reg1);
    if (GET_CODE (reg1) != REG)
      return 0;
    regno1 = REGNO (reg1);
  
    if (GET_CODE (reg2) == SUBREG)
      reg2 = SUBREG_REG (reg2);
    if (GET_CODE (reg2) != REG)
      return 0;
    regno2 = REGNO (reg2);
  
    if (SPARC_INT_REG_P (regno1) && SPARC_INT_REG_P (regno2))
      return 1;
  
    if (TARGET_VIS3)
      {
        if ((SPARC_INT_REG_P (regno1) && SPARC_FP_REG_P (regno2))
  	  || (SPARC_FP_REG_P (regno1) && SPARC_INT_REG_P (regno2)))
  	return 1;
      }
  
    return 0;
  }
  
  /* Return 1 if x and y are some kind of REG and they refer to
     different hard registers.  This test is guaranteed to be
     run after reload.  */
  
  int
  sparc_absnegfloat_split_legitimate (rtx x, rtx y)
  {
    if (GET_CODE (x) != REG)
      return 0;
    if (GET_CODE (y) != REG)
      return 0;
    if (REGNO (x) == REGNO (y))
      return 0;
    return 1;
  }
  
  /* Return 1 if REGNO (reg1) is even and REGNO (reg1) == REGNO (reg2) - 1.
     This makes them candidates for using ldd and std insns.
  
     Note reg1 and reg2 *must* be hard registers.  */
  
  int
  registers_ok_for_ldd_peep (rtx reg1, rtx reg2)
  {
    /* We might have been passed a SUBREG.  */
    if (GET_CODE (reg1) != REG || GET_CODE (reg2) != REG)
      return 0;
  
    if (REGNO (reg1) % 2 != 0)
      return 0;
  
    /* Integer ldd is deprecated in SPARC V9 */
    if (TARGET_V9 && SPARC_INT_REG_P (REGNO (reg1)))
      return 0;
  
    return (REGNO (reg1) == REGNO (reg2) - 1);
  }
  
  /* Return 1 if the addresses in mem1 and mem2 are suitable for use in
     an ldd or std insn.
  
     This can only happen when addr1 and addr2, the addresses in mem1
     and mem2, are consecutive memory locations (addr1 + 4 == addr2).
     addr1 must also be aligned on a 64-bit boundary.
  
     Also iff dependent_reg_rtx is not null it should not be used to
     compute the address for mem1, i.e. we cannot optimize a sequence
     like:
     	ld [%o0], %o0
  	ld [%o0 + 4], %o1
     to
     	ldd [%o0], %o0
     nor:
  	ld [%g3 + 4], %g3
  	ld [%g3], %g2
     to
          ldd [%g3], %g2
  
     But, note that the transformation from:
  	ld [%g2 + 4], %g3
          ld [%g2], %g2
     to
  	ldd [%g2], %g2
     is perfectly fine.  Thus, the peephole2 patterns always pass us
     the destination register of the first load, never the second one.
  
     For stores we don't have a similar problem, so dependent_reg_rtx is
     NULL_RTX.  */
  
  int
  mems_ok_for_ldd_peep (rtx mem1, rtx mem2, rtx dependent_reg_rtx)
  {
    rtx addr1, addr2;
    unsigned int reg1;
    HOST_WIDE_INT offset1;
  
    /* The mems cannot be volatile.  */
    if (MEM_VOLATILE_P (mem1) || MEM_VOLATILE_P (mem2))
      return 0;
  
    /* MEM1 should be aligned on a 64-bit boundary.  */
    if (MEM_ALIGN (mem1) < 64)
      return 0;
  
    addr1 = XEXP (mem1, 0);
    addr2 = XEXP (mem2, 0);
  
    /* Extract a register number and offset (if used) from the first addr.  */
    if (GET_CODE (addr1) == PLUS)
      {
        /* If not a REG, return zero.  */
        if (GET_CODE (XEXP (addr1, 0)) != REG)
  	return 0;
        else
  	{
            reg1 = REGNO (XEXP (addr1, 0));
  	  /* The offset must be constant!  */
  	  if (GET_CODE (XEXP (addr1, 1)) != CONST_INT)
              return 0;
            offset1 = INTVAL (XEXP (addr1, 1));
  	}
      }
    else if (GET_CODE (addr1) != REG)
      return 0;
    else
      {
        reg1 = REGNO (addr1);
        /* This was a simple (mem (reg)) expression.  Offset is 0.  */
        offset1 = 0;
      }
  
    /* Make sure the second address is a (mem (plus (reg) (const_int).  */
    if (GET_CODE (addr2) != PLUS)
      return 0;
  
    if (GET_CODE (XEXP (addr2, 0)) != REG
        || GET_CODE (XEXP (addr2, 1)) != CONST_INT)
      return 0;
  
    if (reg1 != REGNO (XEXP (addr2, 0)))
      return 0;
  
    if (dependent_reg_rtx != NULL_RTX && reg1 == REGNO (dependent_reg_rtx))
      return 0;
  
    /* The first offset must be evenly divisible by 8 to ensure the
       address is 64 bit aligned.  */
    if (offset1 % 8 != 0)
      return 0;
  
    /* The offset for the second addr must be 4 more than the first addr.  */
    if (INTVAL (XEXP (addr2, 1)) != offset1 + 4)
      return 0;
  
    /* All the tests passed.  addr1 and addr2 are valid for ldd and std
       instructions.  */
    return 1;
  }
  
  /* Return 1 if reg is a pseudo, or is the first register in
     a hard register pair.  This makes it suitable for use in
     ldd and std insns.  */
  
  int
  register_ok_for_ldd (rtx reg)
  {
    /* We might have been passed a SUBREG.  */
    if (!REG_P (reg))
      return 0;
  
    if (REGNO (reg) < FIRST_PSEUDO_REGISTER)
      return (REGNO (reg) % 2 == 0);
  
    return 1;
  }
  
  /* Return 1 if OP is a memory whose address is known to be
     aligned to 8-byte boundary, or a pseudo during reload.
     This makes it suitable for use in ldd and std insns.  */
  
  int
  memory_ok_for_ldd (rtx op)
  {
    if (MEM_P (op))
      {
        /* In 64-bit mode, we assume that the address is word-aligned.  */
        if (TARGET_ARCH32 && !mem_min_alignment (op, 8))
  	return 0;
  
        if (! can_create_pseudo_p ()
  	  && !strict_memory_address_p (Pmode, XEXP (op, 0)))
  	return 0;
      }
    else if (REG_P (op) && REGNO (op) >= FIRST_PSEUDO_REGISTER)
      {
        if (!(reload_in_progress && reg_renumber [REGNO (op)] < 0))
  	return 0;
      }
    else
      return 0;
  
    return 1;
  }
  
  /* Implement TARGET_PRINT_OPERAND_PUNCT_VALID_P.  */
  
  static bool
  sparc_print_operand_punct_valid_p (unsigned char code)
  {
    if (code == '#'
        || code == '*'
        || code == '('
        || code == ')'
        || code == '_'
        || code == '&')
      return true;
  
    return false;
  }
  
  /* Implement TARGET_PRINT_OPERAND.
     Print operand X (an rtx) in assembler syntax to file FILE.
     CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
     For `%' followed by punctuation, CODE is the punctuation and X is null.  */
  
  static void
  sparc_print_operand (FILE *file, rtx x, int code)
  {
    switch (code)
      {
      case '#':
        /* Output an insn in a delay slot.  */
        if (final_sequence)
          sparc_indent_opcode = 1;
        else
  	fputs ("\n\t nop", file);
        return;
      case '*':
        /* Output an annul flag if there's nothing for the delay slot and we
  	 are optimizing.  This is always used with '(' below.
           Sun OS 4.1.1 dbx can't handle an annulled unconditional branch;
  	 this is a dbx bug.  So, we only do this when optimizing.
           On UltraSPARC, a branch in a delay slot causes a pipeline flush.
  	 Always emit a nop in case the next instruction is a branch.  */
        if (! final_sequence && (optimize && (int)sparc_cpu < PROCESSOR_V9))
  	fputs (",a", file);
        return;
      case '(':
        /* Output a 'nop' if there's nothing for the delay slot and we are
  	 not optimizing.  This is always used with '*' above.  */
        if (! final_sequence && ! (optimize && (int)sparc_cpu < PROCESSOR_V9))
  	fputs ("\n\t nop", file);
        else if (final_sequence)
          sparc_indent_opcode = 1;
        return;
      case ')':
        /* Output the right displacement from the saved PC on function return.
  	 The caller may have placed an "unimp" insn immediately after the call
  	 so we have to account for it.  This insn is used in the 32-bit ABI
  	 when calling a function that returns a non zero-sized structure.  The
  	 64-bit ABI doesn't have it.  Be careful to have this test be the same
  	 as that for the call.  The exception is when sparc_std_struct_return
  	 is enabled, the psABI is followed exactly and the adjustment is made
  	 by the code in sparc_struct_value_rtx.  The call emitted is the same
  	 when sparc_std_struct_return is enabled. */
       if (!TARGET_ARCH64
  	 && cfun->returns_struct
  	 && !sparc_std_struct_return
  	 && DECL_SIZE (DECL_RESULT (current_function_decl))
  	 && TREE_CODE (DECL_SIZE (DECL_RESULT (current_function_decl)))
  	     == INTEGER_CST
  	 && !integer_zerop (DECL_SIZE (DECL_RESULT (current_function_decl))))
  	fputs ("12", file);
        else
          fputc ('8', file);
        return;
      case '_':
        /* Output the Embedded Medium/Anywhere code model base register.  */
        fputs (EMBMEDANY_BASE_REG, file);
        return;
      case '&':
        /* Print some local dynamic TLS name.  */
        assemble_name (file, get_some_local_dynamic_name ());
        return;
  
      case 'Y':
        /* Adjust the operand to take into account a RESTORE operation.  */
        if (GET_CODE (x) == CONST_INT)
  	break;
        else if (GET_CODE (x) != REG)
  	output_operand_lossage ("invalid %%Y operand");
        else if (REGNO (x) < 8)
  	fputs (reg_names[REGNO (x)], file);
        else if (REGNO (x) >= 24 && REGNO (x) < 32)
  	fputs (reg_names[REGNO (x)-16], file);
        else
  	output_operand_lossage ("invalid %%Y operand");
        return;
      case 'L':
        /* Print out the low order register name of a register pair.  */
        if (WORDS_BIG_ENDIAN)
  	fputs (reg_names[REGNO (x)+1], file);
        else
  	fputs (reg_names[REGNO (x)], file);
        return;
      case 'H':
        /* Print out the high order register name of a register pair.  */
        if (WORDS_BIG_ENDIAN)
  	fputs (reg_names[REGNO (x)], file);
        else
  	fputs (reg_names[REGNO (x)+1], file);
        return;
      case 'R':
        /* Print out the second register name of a register pair or quad.
  	 I.e., R (%o0) => %o1.  */
        fputs (reg_names[REGNO (x)+1], file);
        return;
      case 'S':
        /* Print out the third register name of a register quad.
  	 I.e., S (%o0) => %o2.  */
        fputs (reg_names[REGNO (x)+2], file);
        return;
      case 'T':
        /* Print out the fourth register name of a register quad.
  	 I.e., T (%o0) => %o3.  */
        fputs (reg_names[REGNO (x)+3], file);
        return;
      case 'x':
        /* Print a condition code register.  */
        if (REGNO (x) == SPARC_ICC_REG)
  	{
  	  /* We don't handle CC[X]_NOOVmode because they're not supposed
  	     to occur here.  */
  	  if (GET_MODE (x) == CCmode)
  	    fputs ("%icc", file);
  	  else if (GET_MODE (x) == CCXmode)
  	    fputs ("%xcc", file);
  	  else
  	    gcc_unreachable ();
  	}
        else
  	/* %fccN register */
  	fputs (reg_names[REGNO (x)], file);
        return;
      case 'm':
        /* Print the operand's address only.  */
        output_address (XEXP (x, 0));
        return;
      case 'r':
        /* In this case we need a register.  Use %g0 if the
  	 operand is const0_rtx.  */
        if (x == const0_rtx
  	  || (GET_MODE (x) != VOIDmode && x == CONST0_RTX (GET_MODE (x))))
  	{
  	  fputs ("%g0", file);
  	  return;
  	}
        else
  	break;
  
      case 'A':
        switch (GET_CODE (x))
  	{
  	case IOR: fputs ("or", file); break;
  	case AND: fputs ("and", file); break;
  	case XOR: fputs ("xor", file); break;
  	default: output_operand_lossage ("invalid %%A operand");
  	}
        return;
  
      case 'B':
        switch (GET_CODE (x))
  	{
  	case IOR: fputs ("orn", file); break;
  	case AND: fputs ("andn", file); break;
  	case XOR: fputs ("xnor", file); break;
  	default: output_operand_lossage ("invalid %%B operand");
  	}
        return;
  
        /* This is used by the conditional move instructions.  */
      case 'C':
        {
  	enum rtx_code rc = GET_CODE (x);
  	
  	switch (rc)
  	  {
  	  case NE: fputs ("ne", file); break;
  	  case EQ: fputs ("e", file); break;
  	  case GE: fputs ("ge", file); break;
  	  case GT: fputs ("g", file); break;
  	  case LE: fputs ("le", file); break;
  	  case LT: fputs ("l", file); break;
  	  case GEU: fputs ("geu", file); break;
  	  case GTU: fputs ("gu", file); break;
  	  case LEU: fputs ("leu", file); break;
  	  case LTU: fputs ("lu", file); break;
  	  case LTGT: fputs ("lg", file); break;
  	  case UNORDERED: fputs ("u", file); break;
  	  case ORDERED: fputs ("o", file); break;
  	  case UNLT: fputs ("ul", file); break;
  	  case UNLE: fputs ("ule", file); break;
  	  case UNGT: fputs ("ug", file); break;
  	  case UNGE: fputs ("uge", file); break;
  	  case UNEQ: fputs ("ue", file); break;
  	  default: output_operand_lossage ("invalid %%C operand");
  	  }
  	return;
        }
  
        /* This are used by the movr instruction pattern.  */
      case 'D':
        {
  	enum rtx_code rc = GET_CODE (x);
  	switch (rc)
  	  {
  	  case NE: fputs ("ne", file); break;
  	  case EQ: fputs ("e", file); break;
  	  case GE: fputs ("gez", file); break;
  	  case LT: fputs ("lz", file); break;
  	  case LE: fputs ("lez", file); break;
  	  case GT: fputs ("gz", file); break;
  	  default: output_operand_lossage ("invalid %%D operand");
  	  }
  	return;
        }
  
      case 'b':
        {
  	/* Print a sign-extended character.  */
  	int i = trunc_int_for_mode (INTVAL (x), QImode);
  	fprintf (file, "%d", i);
  	return;
        }
  
      case 'f':
        /* Operand must be a MEM; write its address.  */
        if (GET_CODE (x) != MEM)
  	output_operand_lossage ("invalid %%f operand");
        output_address (XEXP (x, 0));
        return;
  
      case 's':
        {
  	/* Print a sign-extended 32-bit value.  */
  	HOST_WIDE_INT i;
  	if (GET_CODE(x) == CONST_INT)
  	  i = INTVAL (x);
  	else if (GET_CODE(x) == CONST_DOUBLE)
  	  i = CONST_DOUBLE_LOW (x);
  	else
  	  {
  	    output_operand_lossage ("invalid %%s operand");
  	    return;
  	  }
  	i = trunc_int_for_mode (i, SImode);
  	fprintf (file, HOST_WIDE_INT_PRINT_DEC, i);
  	return;
        }
  
      case 0:
        /* Do nothing special.  */
        break;
  
      default:
        /* Undocumented flag.  */
        output_operand_lossage ("invalid operand output code");
      }
  
    if (GET_CODE (x) == REG)
      fputs (reg_names[REGNO (x)], file);
    else if (GET_CODE (x) == MEM)
      {
        fputc ('[', file);
  	/* Poor Sun assembler doesn't understand absolute addressing.  */
        if (CONSTANT_P (XEXP (x, 0)))
  	fputs ("%g0+", file);
        output_address (XEXP (x, 0));
        fputc (']', file);
      }
    else if (GET_CODE (x) == HIGH)
      {
        fputs ("%hi(", file);
        output_addr_const (file, XEXP (x, 0));
        fputc (')', file);
      }
    else if (GET_CODE (x) == LO_SUM)
      {
        sparc_print_operand (file, XEXP (x, 0), 0);
        if (TARGET_CM_MEDMID)
  	fputs ("+%l44(", file);
        else
  	fputs ("+%lo(", file);
        output_addr_const (file, XEXP (x, 1));
        fputc (')', file);
      }
    else if (GET_CODE (x) == CONST_DOUBLE
  	   && (GET_MODE (x) == VOIDmode
  	       || GET_MODE_CLASS (GET_MODE (x)) == MODE_INT))
      {
        if (CONST_DOUBLE_HIGH (x) == 0)
  	fprintf (file, "%u", (unsigned int) CONST_DOUBLE_LOW (x));
        else if (CONST_DOUBLE_HIGH (x) == -1
  	       && CONST_DOUBLE_LOW (x) < 0)
  	fprintf (file, "%d", (int) CONST_DOUBLE_LOW (x));
        else
  	output_operand_lossage ("long long constant not a valid immediate operand");
      }
    else if (GET_CODE (x) == CONST_DOUBLE)
      output_operand_lossage ("floating point constant not a valid immediate operand");
    else { output_addr_const (file, x); }
  }
  
  /* Implement TARGET_PRINT_OPERAND_ADDRESS.  */
  
  static void
  sparc_print_operand_address (FILE *file, rtx x)
  {
    register rtx base, index = 0;
    int offset = 0;
    register rtx addr = x;
  
    if (REG_P (addr))
      fputs (reg_names[REGNO (addr)], file);
    else if (GET_CODE (addr) == PLUS)
      {
        if (CONST_INT_P (XEXP (addr, 0)))
  	offset = INTVAL (XEXP (addr, 0)), base = XEXP (addr, 1);
        else if (CONST_INT_P (XEXP (addr, 1)))
  	offset = INTVAL (XEXP (addr, 1)), base = XEXP (addr, 0);
        else
  	base = XEXP (addr, 0), index = XEXP (addr, 1);
        if (GET_CODE (base) == LO_SUM)
  	{
  	  gcc_assert (USE_AS_OFFSETABLE_LO10
  		      && TARGET_ARCH64
  		      && ! TARGET_CM_MEDMID);
  	  output_operand (XEXP (base, 0), 0);
  	  fputs ("+%lo(", file);
  	  output_address (XEXP (base, 1));
  	  fprintf (file, ")+%d", offset);
  	}
        else
  	{
  	  fputs (reg_names[REGNO (base)], file);
  	  if (index == 0)
  	    fprintf (file, "%+d", offset);
  	  else if (REG_P (index))
  	    fprintf (file, "+%s", reg_names[REGNO (index)]);
  	  else if (GET_CODE (index) == SYMBOL_REF
  		   || GET_CODE (index) == LABEL_REF
  		   || GET_CODE (index) == CONST)
  	    fputc ('+', file), output_addr_const (file, index);
  	  else gcc_unreachable ();
  	}
      }
    else if (GET_CODE (addr) == MINUS
  	   && GET_CODE (XEXP (addr, 1)) == LABEL_REF)
      {
        output_addr_const (file, XEXP (addr, 0));
        fputs ("-(", file);
        output_addr_const (file, XEXP (addr, 1));
        fputs ("-.)", file);
      }
    else if (GET_CODE (addr) == LO_SUM)
      {
        output_operand (XEXP (addr, 0), 0);
        if (TARGET_CM_MEDMID)
          fputs ("+%l44(", file);
        else
          fputs ("+%lo(", file);
        output_address (XEXP (addr, 1));
        fputc (')', file);
      }
    else if (flag_pic
  	   && GET_CODE (addr) == CONST
  	   && GET_CODE (XEXP (addr, 0)) == MINUS
  	   && GET_CODE (XEXP (XEXP (addr, 0), 1)) == CONST
  	   && GET_CODE (XEXP (XEXP (XEXP (addr, 0), 1), 0)) == MINUS
  	   && XEXP (XEXP (XEXP (XEXP (addr, 0), 1), 0), 1) == pc_rtx)
      {
        addr = XEXP (addr, 0);
        output_addr_const (file, XEXP (addr, 0));
        /* Group the args of the second CONST in parenthesis.  */
        fputs ("-(", file);
        /* Skip past the second CONST--it does nothing for us.  */
        output_addr_const (file, XEXP (XEXP (addr, 1), 0));
        /* Close the parenthesis.  */
        fputc (')', file);
      }
    else
      {
        output_addr_const (file, addr);
      }
  }
  
  /* Target hook for assembling integer objects.  The sparc version has
     special handling for aligned DI-mode objects.  */
  
  static bool
  sparc_assemble_integer (rtx x, unsigned int size, int aligned_p)
  {
    /* ??? We only output .xword's for symbols and only then in environments
       where the assembler can handle them.  */
    if (aligned_p && size == 8
        && (GET_CODE (x) != CONST_INT && GET_CODE (x) != CONST_DOUBLE))
      {
        if (TARGET_V9)
  	{
  	  assemble_integer_with_op ("\t.xword\t", x);
  	  return true;
  	}
        else
  	{
  	  assemble_aligned_integer (4, const0_rtx);
  	  assemble_aligned_integer (4, x);
  	  return true;
  	}
      }
    return default_assemble_integer (x, size, aligned_p);
  }
  
  /* Return the value of a code used in the .proc pseudo-op that says
     what kind of result this function returns.  For non-C types, we pick
     the closest C type.  */
  
  #ifndef SHORT_TYPE_SIZE
  #define SHORT_TYPE_SIZE (BITS_PER_UNIT * 2)
  #endif
  
  #ifndef INT_TYPE_SIZE
  #define INT_TYPE_SIZE BITS_PER_WORD
  #endif
  
  #ifndef LONG_TYPE_SIZE
  #define LONG_TYPE_SIZE BITS_PER_WORD
  #endif
  
  #ifndef LONG_LONG_TYPE_SIZE
  #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
  #endif
  
  #ifndef FLOAT_TYPE_SIZE
  #define FLOAT_TYPE_SIZE BITS_PER_WORD
  #endif
  
  #ifndef DOUBLE_TYPE_SIZE
  #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
  #endif
  
  #ifndef LONG_DOUBLE_TYPE_SIZE
  #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
  #endif
  
  unsigned long
  sparc_type_code (register tree type)
  {
    register unsigned long qualifiers = 0;
    register unsigned shift;
  
    /* Only the first 30 bits of the qualifier are valid.  We must refrain from
       setting more, since some assemblers will give an error for this.  Also,
       we must be careful to avoid shifts of 32 bits or more to avoid getting
       unpredictable results.  */
  
    for (shift = 6; shift < 30; shift += 2, type = TREE_TYPE (type))
      {
        switch (TREE_CODE (type))
  	{
  	case ERROR_MARK:
  	  return qualifiers;
  
  	case ARRAY_TYPE:
  	  qualifiers |= (3 << shift);
  	  break;
  
  	case FUNCTION_TYPE:
  	case METHOD_TYPE:
  	  qualifiers |= (2 << shift);
  	  break;
  
  	case POINTER_TYPE:
  	case REFERENCE_TYPE:
  	case OFFSET_TYPE:
  	  qualifiers |= (1 << shift);
  	  break;
  
  	case RECORD_TYPE:
  	  return (qualifiers | 8);
  
  	case UNION_TYPE:
  	case QUAL_UNION_TYPE:
  	  return (qualifiers | 9);
  
  	case ENUMERAL_TYPE:
  	  return (qualifiers | 10);
  
  	case VOID_TYPE:
  	  return (qualifiers | 16);
  
  	case INTEGER_TYPE:
  	  /* If this is a range type, consider it to be the underlying
  	     type.  */
  	  if (TREE_TYPE (type) != 0)
  	    break;
  
  	  /* Carefully distinguish all the standard types of C,
  	     without messing up if the language is not C.  We do this by
  	     testing TYPE_PRECISION and TYPE_UNSIGNED.  The old code used to
  	     look at both the names and the above fields, but that's redundant.
  	     Any type whose size is between two C types will be considered
  	     to be the wider of the two types.  Also, we do not have a
  	     special code to use for "long long", so anything wider than
  	     long is treated the same.  Note that we can't distinguish
  	     between "int" and "long" in this code if they are the same
  	     size, but that's fine, since neither can the assembler.  */
  
  	  if (TYPE_PRECISION (type) <= CHAR_TYPE_SIZE)
  	    return (qualifiers | (TYPE_UNSIGNED (type) ? 12 : 2));
  
  	  else if (TYPE_PRECISION (type) <= SHORT_TYPE_SIZE)
  	    return (qualifiers | (TYPE_UNSIGNED (type) ? 13 : 3));
  
  	  else if (TYPE_PRECISION (type) <= INT_TYPE_SIZE)
  	    return (qualifiers | (TYPE_UNSIGNED (type) ? 14 : 4));
  
  	  else
  	    return (qualifiers | (TYPE_UNSIGNED (type) ? 15 : 5));
  
  	case REAL_TYPE:
  	  /* If this is a range type, consider it to be the underlying
  	     type.  */
  	  if (TREE_TYPE (type) != 0)
  	    break;
  
  	  /* Carefully distinguish all the standard types of C,
  	     without messing up if the language is not C.  */
  
  	  if (TYPE_PRECISION (type) == FLOAT_TYPE_SIZE)
  	    return (qualifiers | 6);
  
  	  else
  	    return (qualifiers | 7);
  
  	case COMPLEX_TYPE:	/* GNU Fortran COMPLEX type.  */
  	  /* ??? We need to distinguish between double and float complex types,
  	     but I don't know how yet because I can't reach this code from
  	     existing front-ends.  */
  	  return (qualifiers | 7);	/* Who knows? */
  
  	case VECTOR_TYPE:
  	case BOOLEAN_TYPE:	/* Boolean truth value type.  */
  	case LANG_TYPE:
  	case NULLPTR_TYPE:
  	  return qualifiers;
  
  	default:
  	  gcc_unreachable ();		/* Not a type! */
          }
      }
  
    return qualifiers;
  }
  
  /* Nested function support.  */
  
  /* Emit RTL insns to initialize the variable parts of a trampoline.
     FNADDR is an RTX for the address of the function's pure code.
     CXT is an RTX for the static chain value for the function.
  
     This takes 16 insns: 2 shifts & 2 ands (to split up addresses), 4 sethi
     (to load in opcodes), 4 iors (to merge address and opcodes), and 4 writes
     (to store insns).  This is a bit excessive.  Perhaps a different
     mechanism would be better here.
  
     Emit enough FLUSH insns to synchronize the data and instruction caches.  */
  
  static void
  sparc32_initialize_trampoline (rtx m_tramp, rtx fnaddr, rtx cxt)
  {
    /* SPARC 32-bit trampoline:
  
   	sethi	%hi(fn), %g1
   	sethi	%hi(static), %g2
   	jmp	%g1+%lo(fn)
   	or	%g2, %lo(static), %g2
  
      SETHI i,r  = 00rr rrr1 00ii iiii iiii iiii iiii iiii
      JMPL r+i,d = 10dd ddd1 1100 0rrr rr1i iiii iiii iiii
     */
  
    emit_move_insn
      (adjust_address (m_tramp, SImode, 0),
       expand_binop (SImode, ior_optab,
  		   expand_shift (RSHIFT_EXPR, SImode, fnaddr, 10, 0, 1),
  		   GEN_INT (trunc_int_for_mode (0x03000000, SImode)),
  		   NULL_RTX, 1, OPTAB_DIRECT));
  
    emit_move_insn
      (adjust_address (m_tramp, SImode, 4),
       expand_binop (SImode, ior_optab,
  		   expand_shift (RSHIFT_EXPR, SImode, cxt, 10, 0, 1),
  		   GEN_INT (trunc_int_for_mode (0x05000000, SImode)),
  		   NULL_RTX, 1, OPTAB_DIRECT));
  
    emit_move_insn
      (adjust_address (m_tramp, SImode, 8),
       expand_binop (SImode, ior_optab,
  		   expand_and (SImode, fnaddr, GEN_INT (0x3ff), NULL_RTX),
  		   GEN_INT (trunc_int_for_mode (0x81c06000, SImode)),
  		   NULL_RTX, 1, OPTAB_DIRECT));
  
    emit_move_insn
      (adjust_address (m_tramp, SImode, 12),
       expand_binop (SImode, ior_optab,
  		   expand_and (SImode, cxt, GEN_INT (0x3ff), NULL_RTX),
  		   GEN_INT (trunc_int_for_mode (0x8410a000, SImode)),
  		   NULL_RTX, 1, OPTAB_DIRECT));
  
    /* On UltraSPARC a flush flushes an entire cache line.  The trampoline is
       aligned on a 16 byte boundary so one flush clears it all.  */
    emit_insn (gen_flush (validize_mem (adjust_address (m_tramp, SImode, 0))));
    if (sparc_cpu != PROCESSOR_ULTRASPARC
        && sparc_cpu != PROCESSOR_ULTRASPARC3
        && sparc_cpu != PROCESSOR_NIAGARA
        && sparc_cpu != PROCESSOR_NIAGARA2
        && sparc_cpu != PROCESSOR_NIAGARA3
        && sparc_cpu != PROCESSOR_NIAGARA4)
      emit_insn (gen_flush (validize_mem (adjust_address (m_tramp, SImode, 8))));
  
    /* Call __enable_execute_stack after writing onto the stack to make sure
       the stack address is accessible.  */
  #ifdef HAVE_ENABLE_EXECUTE_STACK
    emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__enable_execute_stack"),
                       LCT_NORMAL, VOIDmode, 1, XEXP (m_tramp, 0), Pmode);
  #endif
  
  }
  
  /* The 64-bit version is simpler because it makes more sense to load the
     values as "immediate" data out of the trampoline.  It's also easier since
     we can read the PC without clobbering a register.  */
  
  static void
  sparc64_initialize_trampoline (rtx m_tramp, rtx fnaddr, rtx cxt)
  {
    /* SPARC 64-bit trampoline:
  
  	rd	%pc, %g1
  	ldx	[%g1+24], %g5
  	jmp	%g5
  	ldx	[%g1+16], %g5
  	+16 bytes data
     */
  
    emit_move_insn (adjust_address (m_tramp, SImode, 0),
  		  GEN_INT (trunc_int_for_mode (0x83414000, SImode)));
    emit_move_insn (adjust_address (m_tramp, SImode, 4),
  		  GEN_INT (trunc_int_for_mode (0xca586018, SImode)));
    emit_move_insn (adjust_address (m_tramp, SImode, 8),
  		  GEN_INT (trunc_int_for_mode (0x81c14000, SImode)));
    emit_move_insn (adjust_address (m_tramp, SImode, 12),
  		  GEN_INT (trunc_int_for_mode (0xca586010, SImode)));
    emit_move_insn (adjust_address (m_tramp, DImode, 16), cxt);
    emit_move_insn (adjust_address (m_tramp, DImode, 24), fnaddr);
    emit_insn (gen_flushdi (validize_mem (adjust_address (m_tramp, DImode, 0))));
  
    if (sparc_cpu != PROCESSOR_ULTRASPARC
        && sparc_cpu != PROCESSOR_ULTRASPARC3
        && sparc_cpu != PROCESSOR_NIAGARA
        && sparc_cpu != PROCESSOR_NIAGARA2
        && sparc_cpu != PROCESSOR_NIAGARA3
        && sparc_cpu != PROCESSOR_NIAGARA4)
      emit_insn (gen_flushdi (validize_mem (adjust_address (m_tramp, DImode, 8))));
  
    /* Call __enable_execute_stack after writing onto the stack to make sure
       the stack address is accessible.  */
  #ifdef HAVE_ENABLE_EXECUTE_STACK
    emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__enable_execute_stack"),
                       LCT_NORMAL, VOIDmode, 1, XEXP (m_tramp, 0), Pmode);
  #endif
  }
  
  /* Worker for TARGET_TRAMPOLINE_INIT.  */
  
  static void
  sparc_trampoline_init (rtx m_tramp, tree fndecl, rtx cxt)
  {
    rtx fnaddr = force_reg (Pmode, XEXP (DECL_RTL (fndecl), 0));
    cxt = force_reg (Pmode, cxt);
    if (TARGET_ARCH64)
      sparc64_initialize_trampoline (m_tramp, fnaddr, cxt);
    else
      sparc32_initialize_trampoline (m_tramp, fnaddr, cxt);
  }
  
  /* Adjust the cost of a scheduling dependency.  Return the new cost of
     a dependency LINK or INSN on DEP_INSN.  COST is the current cost.  */
  
  static int
  supersparc_adjust_cost (rtx insn, rtx link, rtx dep_insn, int cost)
  {
    enum attr_type insn_type;
  
    if (! recog_memoized (insn))
      return 0;
  
    insn_type = get_attr_type (insn);
  
    if (REG_NOTE_KIND (link) == 0)
      {
        /* Data dependency; DEP_INSN writes a register that INSN reads some
  	 cycles later.  */
  
        /* if a load, then the dependence must be on the memory address;
  	 add an extra "cycle".  Note that the cost could be two cycles
  	 if the reg was written late in an instruction group; we ca not tell
  	 here.  */
        if (insn_type == TYPE_LOAD || insn_type == TYPE_FPLOAD)
  	return cost + 3;
  
        /* Get the delay only if the address of the store is the dependence.  */
        if (insn_type == TYPE_STORE || insn_type == TYPE_FPSTORE)
  	{
  	  rtx pat = PATTERN(insn);
  	  rtx dep_pat = PATTERN (dep_insn);
  
  	  if (GET_CODE (pat) != SET || GET_CODE (dep_pat) != SET)
  	    return cost;  /* This should not happen!  */
  
  	  /* The dependency between the two instructions was on the data that
  	     is being stored.  Assume that this implies that the address of the
  	     store is not dependent.  */
  	  if (rtx_equal_p (SET_DEST (dep_pat), SET_SRC (pat)))
  	    return cost;
  
  	  return cost + 3;  /* An approximation.  */
  	}
  
        /* A shift instruction cannot receive its data from an instruction
  	 in the same cycle; add a one cycle penalty.  */
        if (insn_type == TYPE_SHIFT)
  	return cost + 3;   /* Split before cascade into shift.  */
      }
    else
      {
        /* Anti- or output- dependency; DEP_INSN reads/writes a register that
  	 INSN writes some cycles later.  */
  
        /* These are only significant for the fpu unit; writing a fp reg before
           the fpu has finished with it stalls the processor.  */
  
        /* Reusing an integer register causes no problems.  */
        if (insn_type == TYPE_IALU || insn_type == TYPE_SHIFT)
  	return 0;
      }
  	
    return cost;
  }
  
  static int
  hypersparc_adjust_cost (rtx insn, rtx link, rtx dep_insn, int cost)
  {
    enum attr_type insn_type, dep_type;
    rtx pat = PATTERN(insn);
    rtx dep_pat = PATTERN (dep_insn);
  
    if (recog_memoized (insn) < 0 || recog_memoized (dep_insn) < 0)
      return cost;
  
    insn_type = get_attr_type (insn);
    dep_type = get_attr_type (dep_insn);
  
    switch (REG_NOTE_KIND (link))
      {
      case 0:
        /* Data dependency; DEP_INSN writes a register that INSN reads some
  	 cycles later.  */
  
        switch (insn_type)
  	{
  	case TYPE_STORE:
  	case TYPE_FPSTORE:
  	  /* Get the delay iff the address of the store is the dependence.  */
  	  if (GET_CODE (pat) != SET || GET_CODE (dep_pat) != SET)
  	    return cost;
  
  	  if (rtx_equal_p (SET_DEST (dep_pat), SET_SRC (pat)))
  	    return cost;
  	  return cost + 3;
  
  	case TYPE_LOAD:
  	case TYPE_SLOAD:
  	case TYPE_FPLOAD:
  	  /* If a load, then the dependence must be on the memory address.  If
  	     the addresses aren't equal, then it might be a false dependency */
  	  if (dep_type == TYPE_STORE || dep_type == TYPE_FPSTORE)
  	    {
  	      if (GET_CODE (pat) != SET || GET_CODE (dep_pat) != SET
  		  || GET_CODE (SET_DEST (dep_pat)) != MEM
  		  || GET_CODE (SET_SRC (pat)) != MEM
  		  || ! rtx_equal_p (XEXP (SET_DEST (dep_pat), 0),
  				    XEXP (SET_SRC (pat), 0)))
  		return cost + 2;
  
  	      return cost + 8;
  	    }
  	  break;
  
  	case TYPE_BRANCH:
  	  /* Compare to branch latency is 0.  There is no benefit from
  	     separating compare and branch.  */
  	  if (dep_type == TYPE_COMPARE)
  	    return 0;
  	  /* Floating point compare to branch latency is less than
  	     compare to conditional move.  */
  	  if (dep_type == TYPE_FPCMP)
  	    return cost - 1;
  	  break;
  	default:
  	  break;
  	}
  	break;
  
      case REG_DEP_ANTI:
        /* Anti-dependencies only penalize the fpu unit.  */
        if (insn_type == TYPE_IALU || insn_type == TYPE_SHIFT)
          return 0;
        break;
  
      default:
        break;
      }
  
    return cost;
  }
  
  static int
  sparc_adjust_cost(rtx insn, rtx link, rtx dep, int cost)
  {
    switch (sparc_cpu)
      {
      case PROCESSOR_SUPERSPARC:
        cost = supersparc_adjust_cost (insn, link, dep, cost);
        break;
      case PROCESSOR_HYPERSPARC:
      case PROCESSOR_SPARCLITE86X:
        cost = hypersparc_adjust_cost (insn, link, dep, cost);
        break;
      default:
        break;
      }
    return cost;
  }
  
  static void
  sparc_sched_init (FILE *dump ATTRIBUTE_UNUSED,
  		  int sched_verbose ATTRIBUTE_UNUSED,
  		  int max_ready ATTRIBUTE_UNUSED)
  {}
  
  static int
  sparc_use_sched_lookahead (void)
  {
    if (sparc_cpu == PROCESSOR_NIAGARA
        || sparc_cpu == PROCESSOR_NIAGARA2
        || sparc_cpu == PROCESSOR_NIAGARA3
        || sparc_cpu == PROCESSOR_NIAGARA4)
      return 0;
    if (sparc_cpu == PROCESSOR_ULTRASPARC
        || sparc_cpu == PROCESSOR_ULTRASPARC3)
      return 4;
    if ((1 << sparc_cpu) &
        ((1 << PROCESSOR_SUPERSPARC) | (1 << PROCESSOR_HYPERSPARC) |
         (1 << PROCESSOR_SPARCLITE86X)))
      return 3;
    return 0;
  }
  
  static int
  sparc_issue_rate (void)
  {
    switch (sparc_cpu)
      {
      case PROCESSOR_NIAGARA:
      case PROCESSOR_NIAGARA2:
      case PROCESSOR_NIAGARA3:
      case PROCESSOR_NIAGARA4:
      default:
        return 1;
      case PROCESSOR_V9:
        /* Assume V9 processors are capable of at least dual-issue.  */
        return 2;
      case PROCESSOR_SUPERSPARC:
        return 3;
      case PROCESSOR_HYPERSPARC:
      case PROCESSOR_SPARCLITE86X:
        return 2;
      case PROCESSOR_ULTRASPARC:
      case PROCESSOR_ULTRASPARC3:
        return 4;
      }
  }
  
  static int
  set_extends (rtx insn)
  {
    register rtx pat = PATTERN (insn);
  
    switch (GET_CODE (SET_SRC (pat)))
      {
        /* Load and some shift instructions zero extend.  */
      case MEM:
      case ZERO_EXTEND:
        /* sethi clears the high bits */
      case HIGH:
        /* LO_SUM is used with sethi.  sethi cleared the high
  	 bits and the values used with lo_sum are positive */
      case LO_SUM:
        /* Store flag stores 0 or 1 */
      case LT: case LTU:
      case GT: case GTU:
      case LE: case LEU:
      case GE: case GEU:
      case EQ:
      case NE:
        return 1;
      case AND:
        {
  	rtx op0 = XEXP (SET_SRC (pat), 0);
  	rtx op1 = XEXP (SET_SRC (pat), 1);
  	if (GET_CODE (op1) == CONST_INT)
  	  return INTVAL (op1) >= 0;
  	if (GET_CODE (op0) != REG)
  	  return 0;
  	if (sparc_check_64 (op0, insn) == 1)
  	  return 1;
  	return (GET_CODE (op1) == REG && sparc_check_64 (op1, insn) == 1);
        }
      case IOR:
      case XOR:
        {
  	rtx op0 = XEXP (SET_SRC (pat), 0);
  	rtx op1 = XEXP (SET_SRC (pat), 1);
  	if (GET_CODE (op0) != REG || sparc_check_64 (op0, insn) <= 0)
  	  return 0;
  	if (GET_CODE (op1) == CONST_INT)
  	  return INTVAL (op1) >= 0;
  	return (GET_CODE (op1) == REG && sparc_check_64 (op1, insn) == 1);
        }
      case LSHIFTRT:
        return GET_MODE (SET_SRC (pat)) == SImode;
        /* Positive integers leave the high bits zero.  */
      case CONST_DOUBLE:
        return ! (CONST_DOUBLE_LOW (SET_SRC (pat)) & 0x80000000);
      case CONST_INT:
        return ! (INTVAL (SET_SRC (pat)) & 0x80000000);
      case ASHIFTRT:
      case SIGN_EXTEND:
        return - (GET_MODE (SET_SRC (pat)) == SImode);
      case REG:
        return sparc_check_64 (SET_SRC (pat), insn);
      default:
        return 0;
      }
  }
  
  /* We _ought_ to have only one kind per function, but...  */
  static GTY(()) rtx sparc_addr_diff_list;
  static GTY(()) rtx sparc_addr_list;
  
  void
  sparc_defer_case_vector (rtx lab, rtx vec, int diff)
  {
    vec = gen_rtx_EXPR_LIST (VOIDmode, lab, vec);
    if (diff)
      sparc_addr_diff_list
        = gen_rtx_EXPR_LIST (VOIDmode, vec, sparc_addr_diff_list);
    else
      sparc_addr_list = gen_rtx_EXPR_LIST (VOIDmode, vec, sparc_addr_list);
  }
  
  static void
  sparc_output_addr_vec (rtx vec)
  {
    rtx lab = XEXP (vec, 0), body = XEXP (vec, 1);
    int idx, vlen = XVECLEN (body, 0);
  
  #ifdef ASM_OUTPUT_ADDR_VEC_START
    ASM_OUTPUT_ADDR_VEC_START (asm_out_file);
  #endif
  
  #ifdef ASM_OUTPUT_CASE_LABEL
    ASM_OUTPUT_CASE_LABEL (asm_out_file, "L", CODE_LABEL_NUMBER (lab),
  			 NEXT_INSN (lab));
  #else
    (*targetm.asm_out.internal_label) (asm_out_file, "L", CODE_LABEL_NUMBER (lab));
  #endif
  
    for (idx = 0; idx < vlen; idx++)
      {
        ASM_OUTPUT_ADDR_VEC_ELT
  	(asm_out_file, CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 0, idx), 0)));
      }
  
  #ifdef ASM_OUTPUT_ADDR_VEC_END
    ASM_OUTPUT_ADDR_VEC_END (asm_out_file);
  #endif
  }
  
  static void
  sparc_output_addr_diff_vec (rtx vec)
  {
    rtx lab = XEXP (vec, 0), body = XEXP (vec, 1);
    rtx base = XEXP (XEXP (body, 0), 0);
    int idx, vlen = XVECLEN (body, 1);
  
  #ifdef ASM_OUTPUT_ADDR_VEC_START
    ASM_OUTPUT_ADDR_VEC_START (asm_out_file);
  #endif
  
  #ifdef ASM_OUTPUT_CASE_LABEL
    ASM_OUTPUT_CASE_LABEL (asm_out_file, "L", CODE_LABEL_NUMBER (lab),
  			 NEXT_INSN (lab));
  #else
    (*targetm.asm_out.internal_label) (asm_out_file, "L", CODE_LABEL_NUMBER (lab));
  #endif
  
    for (idx = 0; idx < vlen; idx++)
      {
        ASM_OUTPUT_ADDR_DIFF_ELT
          (asm_out_file,
           body,
           CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 1, idx), 0)),
           CODE_LABEL_NUMBER (base));
      }
  
  #ifdef ASM_OUTPUT_ADDR_VEC_END
    ASM_OUTPUT_ADDR_VEC_END (asm_out_file);
  #endif
  }
  
  static void
  sparc_output_deferred_case_vectors (void)
  {
    rtx t;
    int align;
  
    if (sparc_addr_list == NULL_RTX
        && sparc_addr_diff_list == NULL_RTX)
      return;
  
    /* Align to cache line in the function's code section.  */
    switch_to_section (current_function_section ());
  
    align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT);
    if (align > 0)
      ASM_OUTPUT_ALIGN (asm_out_file, align);
  
    for (t = sparc_addr_list; t ; t = XEXP (t, 1))
      sparc_output_addr_vec (XEXP (t, 0));
    for (t = sparc_addr_diff_list; t ; t = XEXP (t, 1))
      sparc_output_addr_diff_vec (XEXP (t, 0));
  
    sparc_addr_list = sparc_addr_diff_list = NULL_RTX;
  }
  
  /* Return 0 if the high 32 bits of X (the low word of X, if DImode) are
     unknown.  Return 1 if the high bits are zero, -1 if the register is
     sign extended.  */
  int
  sparc_check_64 (rtx x, rtx insn)
  {
    /* If a register is set only once it is safe to ignore insns this
       code does not know how to handle.  The loop will either recognize
       the single set and return the correct value or fail to recognize
       it and return 0.  */
    int set_once = 0;
    rtx y = x;
  
    gcc_assert (GET_CODE (x) == REG);
  
    if (GET_MODE (x) == DImode)
      y = gen_rtx_REG (SImode, REGNO (x) + WORDS_BIG_ENDIAN);
  
    if (flag_expensive_optimizations
        && df && DF_REG_DEF_COUNT (REGNO (y)) == 1)
      set_once = 1;
  
    if (insn == 0)
      {
        if (set_once)
  	insn = get_last_insn_anywhere ();
        else
  	return 0;
      }
  
    while ((insn = PREV_INSN (insn)))
      {
        switch (GET_CODE (insn))
  	{
  	case JUMP_INSN:
  	case NOTE:
  	  break;
  	case CODE_LABEL:
  	case CALL_INSN:
  	default:
  	  if (! set_once)
  	    return 0;
  	  break;
  	case INSN:
  	  {
  	    rtx pat = PATTERN (insn);
  	    if (GET_CODE (pat) != SET)
  	      return 0;
  	    if (rtx_equal_p (x, SET_DEST (pat)))
  	      return set_extends (insn);
  	    if (y && rtx_equal_p (y, SET_DEST (pat)))
  	      return set_extends (insn);
  	    if (reg_overlap_mentioned_p (SET_DEST (pat), y))
  	      return 0;
  	  }
  	}
      }
    return 0;
  }
  
  /* Output a wide shift instruction in V8+ mode.  INSN is the instruction,
     OPERANDS are its operands and OPCODE is the mnemonic to be used.  */
  
  const char *
  output_v8plus_shift (rtx insn, rtx *operands, const char *opcode)
  {
    static char asm_code[60];
  
    /* The scratch register is only required when the destination
       register is not a 64-bit global or out register.  */
    if (which_alternative != 2)
      operands[3] = operands[0];
  
    /* We can only shift by constants <= 63. */
    if (GET_CODE (operands[2]) == CONST_INT)
      operands[2] = GEN_INT (INTVAL (operands[2]) & 0x3f);
  
    if (GET_CODE (operands[1]) == CONST_INT)
      {
        output_asm_insn ("mov\t%1, %3", operands);
      }
    else
      {
        output_asm_insn ("sllx\t%H1, 32, %3", operands);
        if (sparc_check_64 (operands[1], insn) <= 0)
  	output_asm_insn ("srl\t%L1, 0, %L1", operands);
        output_asm_insn ("or\t%L1, %3, %3", operands);
      }
  
    strcpy (asm_code, opcode);
  
    if (which_alternative != 2)
      return strcat (asm_code, "\t%0, %2, %L0\n\tsrlx\t%L0, 32, %H0");
    else
      return
        strcat (asm_code, "\t%3, %2, %3\n\tsrlx\t%3, 32, %H0\n\tmov\t%3, %L0");
  }
  
  /* Output rtl to increment the profiler label LABELNO
     for profiling a function entry.  */
  
  void
  sparc_profile_hook (int labelno)
  {
    char buf[32];
    rtx lab, fun;
  
    fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_FUNCTION);
    if (NO_PROFILE_COUNTERS)
      {
        emit_library_call (fun, LCT_NORMAL, VOIDmode, 0);
      }
    else
      {
        ASM_GENERATE_INTERNAL_LABEL (buf, "LP", labelno);
        lab = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (buf));
        emit_library_call (fun, LCT_NORMAL, VOIDmode, 1, lab, Pmode);
      }
  }
  
  #ifdef TARGET_SOLARIS
  /* Solaris implementation of TARGET_ASM_NAMED_SECTION.  */
  
  static void
  sparc_solaris_elf_asm_named_section (const char *name, unsigned int flags,
  				     tree decl ATTRIBUTE_UNUSED)
  {
    if (HAVE_COMDAT_GROUP && flags & SECTION_LINKONCE)
      {
        solaris_elf_asm_comdat_section (name, flags, decl);
        return;
      }
  
    fprintf (asm_out_file, "\t.section\t\"%s\"", name);
  
    if (!(flags & SECTION_DEBUG))
      fputs (",#alloc", asm_out_file);
    if (flags & SECTION_WRITE)
      fputs (",#write", asm_out_file);
    if (flags & SECTION_TLS)
      fputs (",#tls", asm_out_file);
    if (flags & SECTION_CODE)
      fputs (",#execinstr", asm_out_file);
  
    /* ??? Handle SECTION_BSS.  */
  
    fputc ('\n', asm_out_file);
  }
  #endif /* TARGET_SOLARIS */
  
  /* We do not allow indirect calls to be optimized into sibling calls.
  
     We cannot use sibling calls when delayed branches are disabled
     because they will likely require the call delay slot to be filled.
  
     Also, on SPARC 32-bit we cannot emit a sibling call when the
     current function returns a structure.  This is because the "unimp
     after call" convention would cause the callee to return to the
     wrong place.  The generic code already disallows cases where the
     function being called returns a structure.
  
     It may seem strange how this last case could occur.  Usually there
     is code after the call which jumps to epilogue code which dumps the
     return value into the struct return area.  That ought to invalidate
     the sibling call right?  Well, in the C++ case we can end up passing
     the pointer to the struct return area to a constructor (which returns
     void) and then nothing else happens.  Such a sibling call would look
     valid without the added check here.
  
     VxWorks PIC PLT entries require the global pointer to be initialized
     on entry.  We therefore can't emit sibling calls to them.  */
  static bool
  sparc_function_ok_for_sibcall (tree decl, tree exp ATTRIBUTE_UNUSED)
  {
    return (decl
  	  && flag_delayed_branch
  	  && (TARGET_ARCH64 || ! cfun->returns_struct)
  	  && !(TARGET_VXWORKS_RTP
  	       && flag_pic
  	       && !targetm.binds_local_p (decl)));
  }
  
  /* libfunc renaming.  */
  
  static void
  sparc_init_libfuncs (void)
  {
    if (TARGET_ARCH32)
      {
        /* Use the subroutines that Sun's library provides for integer
  	 multiply and divide.  The `*' prevents an underscore from
  	 being prepended by the compiler. .umul is a little faster
  	 than .mul.  */
        set_optab_libfunc (smul_optab, SImode, "*.umul");
        set_optab_libfunc (sdiv_optab, SImode, "*.div");
        set_optab_libfunc (udiv_optab, SImode, "*.udiv");
        set_optab_libfunc (smod_optab, SImode, "*.rem");
        set_optab_libfunc (umod_optab, SImode, "*.urem");
  
        /* TFmode arithmetic.  These names are part of the SPARC 32bit ABI.  */
        set_optab_libfunc (add_optab, TFmode, "_Q_add");
        set_optab_libfunc (sub_optab, TFmode, "_Q_sub");
        set_optab_libfunc (neg_optab, TFmode, "_Q_neg");
        set_optab_libfunc (smul_optab, TFmode, "_Q_mul");
        set_optab_libfunc (sdiv_optab, TFmode, "_Q_div");
  
        /* We can define the TFmode sqrt optab only if TARGET_FPU.  This
  	 is because with soft-float, the SFmode and DFmode sqrt
  	 instructions will be absent, and the compiler will notice and
  	 try to use the TFmode sqrt instruction for calls to the
  	 builtin function sqrt, but this fails.  */
        if (TARGET_FPU)
  	set_optab_libfunc (sqrt_optab, TFmode, "_Q_sqrt");
  
        set_optab_libfunc (eq_optab, TFmode, "_Q_feq");
        set_optab_libfunc (ne_optab, TFmode, "_Q_fne");
        set_optab_libfunc (gt_optab, TFmode, "_Q_fgt");
        set_optab_libfunc (ge_optab, TFmode, "_Q_fge");
        set_optab_libfunc (lt_optab, TFmode, "_Q_flt");
        set_optab_libfunc (le_optab, TFmode, "_Q_fle");
  
        set_conv_libfunc (sext_optab,   TFmode, SFmode, "_Q_stoq");
        set_conv_libfunc (sext_optab,   TFmode, DFmode, "_Q_dtoq");
        set_conv_libfunc (trunc_optab,  SFmode, TFmode, "_Q_qtos");
        set_conv_libfunc (trunc_optab,  DFmode, TFmode, "_Q_qtod");
  
        set_conv_libfunc (sfix_optab,   SImode, TFmode, "_Q_qtoi");
        set_conv_libfunc (ufix_optab,   SImode, TFmode, "_Q_qtou");
        set_conv_libfunc (sfloat_optab, TFmode, SImode, "_Q_itoq");
        set_conv_libfunc (ufloat_optab, TFmode, SImode, "_Q_utoq");
  
        if (DITF_CONVERSION_LIBFUNCS)
  	{
  	  set_conv_libfunc (sfix_optab,   DImode, TFmode, "_Q_qtoll");
  	  set_conv_libfunc (ufix_optab,   DImode, TFmode, "_Q_qtoull");
  	  set_conv_libfunc (sfloat_optab, TFmode, DImode, "_Q_lltoq");
  	  set_conv_libfunc (ufloat_optab, TFmode, DImode, "_Q_ulltoq");
  	}
  
        if (SUN_CONVERSION_LIBFUNCS)
  	{
  	  set_conv_libfunc (sfix_optab, DImode, SFmode, "__ftoll");
  	  set_conv_libfunc (ufix_optab, DImode, SFmode, "__ftoull");
  	  set_conv_libfunc (sfix_optab, DImode, DFmode, "__dtoll");
  	  set_conv_libfunc (ufix_optab, DImode, DFmode, "__dtoull");
  	}
      }
    if (TARGET_ARCH64)
      {
        /* In the SPARC 64bit ABI, SImode multiply and divide functions
  	 do not exist in the library.  Make sure the compiler does not
  	 emit calls to them by accident.  (It should always use the
           hardware instructions.)  */
        set_optab_libfunc (smul_optab, SImode, 0);
        set_optab_libfunc (sdiv_optab, SImode, 0);
        set_optab_libfunc (udiv_optab, SImode, 0);
        set_optab_libfunc (smod_optab, SImode, 0);
        set_optab_libfunc (umod_optab, SImode, 0);
  
        if (SUN_INTEGER_MULTIPLY_64)
  	{
  	  set_optab_libfunc (smul_optab, DImode, "__mul64");
  	  set_optab_libfunc (sdiv_optab, DImode, "__div64");
  	  set_optab_libfunc (udiv_optab, DImode, "__udiv64");
  	  set_optab_libfunc (smod_optab, DImode, "__rem64");
  	  set_optab_libfunc (umod_optab, DImode, "__urem64");
  	}
  
        if (SUN_CONVERSION_LIBFUNCS)
  	{
  	  set_conv_libfunc (sfix_optab, DImode, SFmode, "__ftol");
  	  set_conv_libfunc (ufix_optab, DImode, SFmode, "__ftoul");
  	  set_conv_libfunc (sfix_optab, DImode, DFmode, "__dtol");
  	  set_conv_libfunc (ufix_optab, DImode, DFmode, "__dtoul");
  	}
      }
  }
  
  static tree def_builtin(const char *name, int code, tree type)
  {
    return add_builtin_function(name, type, code, BUILT_IN_MD, NULL,
  			      NULL_TREE);
  }
  
  static tree def_builtin_const(const char *name, int code, tree type)
  {
    tree t = def_builtin(name, code, type);
  
    if (t)
      TREE_READONLY (t) = 1;
  
    return t;
  }
  
  /* Implement the TARGET_INIT_BUILTINS target hook.
     Create builtin functions for special SPARC instructions.  */
  
  static void
  sparc_init_builtins (void)
  {
    if (TARGET_VIS)
      sparc_vis_init_builtins ();
  }
  
  /* Create builtin functions for VIS 1.0 instructions.  */
  
  static void
  sparc_vis_init_builtins (void)
  {
    tree v4qi = build_vector_type (unsigned_intQI_type_node, 4);
    tree v8qi = build_vector_type (unsigned_intQI_type_node, 8);
    tree v4hi = build_vector_type (intHI_type_node, 4);
    tree v2hi = build_vector_type (intHI_type_node, 2);
    tree v2si = build_vector_type (intSI_type_node, 2);
    tree v1si = build_vector_type (intSI_type_node, 1);
  
    tree v4qi_ftype_v4hi = build_function_type_list (v4qi, v4hi, 0);
    tree v8qi_ftype_v2si_v8qi = build_function_type_list (v8qi, v2si, v8qi, 0);
    tree v2hi_ftype_v2si = build_function_type_list (v2hi, v2si, 0);
    tree v4hi_ftype_v4qi = build_function_type_list (v4hi, v4qi, 0);
    tree v8qi_ftype_v4qi_v4qi = build_function_type_list (v8qi, v4qi, v4qi, 0);
    tree v4hi_ftype_v4qi_v4hi = build_function_type_list (v4hi, v4qi, v4hi, 0);
    tree v4hi_ftype_v4qi_v2hi = build_function_type_list (v4hi, v4qi, v2hi, 0);
    tree v2si_ftype_v4qi_v2hi = build_function_type_list (v2si, v4qi, v2hi, 0);
    tree v4hi_ftype_v8qi_v4hi = build_function_type_list (v4hi, v8qi, v4hi, 0);
    tree v4hi_ftype_v4hi_v4hi = build_function_type_list (v4hi, v4hi, v4hi, 0);
    tree v2si_ftype_v2si_v2si = build_function_type_list (v2si, v2si, v2si, 0);
    tree v8qi_ftype_v8qi_v8qi = build_function_type_list (v8qi, v8qi, v8qi, 0);
    tree v2hi_ftype_v2hi_v2hi = build_function_type_list (v2hi, v2hi, v2hi, 0);
    tree v1si_ftype_v1si_v1si = build_function_type_list (v1si, v1si, v1si, 0);
    tree di_ftype_v8qi_v8qi_di = build_function_type_list (intDI_type_node,
  							 v8qi, v8qi,
  							 intDI_type_node, 0);
    tree di_ftype_v8qi_v8qi = build_function_type_list (intDI_type_node,
  						      v8qi, v8qi, 0);
    tree si_ftype_v8qi_v8qi = build_function_type_list (intSI_type_node,
  						      v8qi, v8qi, 0);
    tree di_ftype_di_di = build_function_type_list (intDI_type_node,
  						  intDI_type_node,
  						  intDI_type_node, 0);
    tree si_ftype_si_si = build_function_type_list (intSI_type_node,
  						  intSI_type_node,
  						  intSI_type_node, 0);
    tree ptr_ftype_ptr_si = build_function_type_list (ptr_type_node,
  		        			    ptr_type_node,
  					            intSI_type_node, 0);
    tree ptr_ftype_ptr_di = build_function_type_list (ptr_type_node,
  		        			    ptr_type_node,
  					            intDI_type_node, 0);
    tree si_ftype_ptr_ptr = build_function_type_list (intSI_type_node,
  		        			    ptr_type_node,
  					            ptr_type_node, 0);
    tree di_ftype_ptr_ptr = build_function_type_list (intDI_type_node,
  		        			    ptr_type_node,
  					            ptr_type_node, 0);
    tree si_ftype_v4hi_v4hi = build_function_type_list (intSI_type_node,
  						      v4hi, v4hi, 0);
    tree si_ftype_v2si_v2si = build_function_type_list (intSI_type_node,
  						      v2si, v2si, 0);
    tree di_ftype_v4hi_v4hi = build_function_type_list (intDI_type_node,
  						      v4hi, v4hi, 0);
    tree di_ftype_v2si_v2si = build_function_type_list (intDI_type_node,
  						      v2si, v2si, 0);
    tree void_ftype_di = build_function_type_list (void_type_node,
  						 intDI_type_node, 0);
    tree di_ftype_void = build_function_type_list (intDI_type_node,
  						 void_type_node, 0);
    tree void_ftype_si = build_function_type_list (void_type_node,
  						 intSI_type_node, 0);
    tree sf_ftype_sf_sf = build_function_type_list (float_type_node,
  						  float_type_node,
  						  float_type_node, 0);
    tree df_ftype_df_df = build_function_type_list (double_type_node,
  						  double_type_node,
  						  double_type_node, 0);
  
    /* Packing and expanding vectors.  */
    def_builtin ("__builtin_vis_fpack16", CODE_FOR_fpack16_vis,
  	       v4qi_ftype_v4hi);
    def_builtin ("__builtin_vis_fpack32", CODE_FOR_fpack32_vis,
  	       v8qi_ftype_v2si_v8qi);
    def_builtin ("__builtin_vis_fpackfix", CODE_FOR_fpackfix_vis,
  	       v2hi_ftype_v2si);
    def_builtin_const ("__builtin_vis_fexpand", CODE_FOR_fexpand_vis,
  		     v4hi_ftype_v4qi);
    def_builtin_const ("__builtin_vis_fpmerge", CODE_FOR_fpmerge_vis,
  		     v8qi_ftype_v4qi_v4qi);
  
    /* Multiplications.  */
    def_builtin_const ("__builtin_vis_fmul8x16", CODE_FOR_fmul8x16_vis,
  		     v4hi_ftype_v4qi_v4hi);
    def_builtin_const ("__builtin_vis_fmul8x16au", CODE_FOR_fmul8x16au_vis,
  		     v4hi_ftype_v4qi_v2hi);
    def_builtin_const ("__builtin_vis_fmul8x16al", CODE_FOR_fmul8x16al_vis,
  		     v4hi_ftype_v4qi_v2hi);
    def_builtin_const ("__builtin_vis_fmul8sux16", CODE_FOR_fmul8sux16_vis,
  		     v4hi_ftype_v8qi_v4hi);
    def_builtin_const ("__builtin_vis_fmul8ulx16", CODE_FOR_fmul8ulx16_vis,
  		     v4hi_ftype_v8qi_v4hi);
    def_builtin_const ("__builtin_vis_fmuld8sux16", CODE_FOR_fmuld8sux16_vis,
  		     v2si_ftype_v4qi_v2hi);
    def_builtin_const ("__builtin_vis_fmuld8ulx16", CODE_FOR_fmuld8ulx16_vis,
  		     v2si_ftype_v4qi_v2hi);
  
    /* Data aligning.  */
    def_builtin ("__builtin_vis_faligndatav4hi", CODE_FOR_faligndatav4hi_vis,
  	       v4hi_ftype_v4hi_v4hi);
    def_builtin ("__builtin_vis_faligndatav8qi", CODE_FOR_faligndatav8qi_vis,
  	       v8qi_ftype_v8qi_v8qi);
    def_builtin ("__builtin_vis_faligndatav2si", CODE_FOR_faligndatav2si_vis,
  	       v2si_ftype_v2si_v2si);
    def_builtin ("__builtin_vis_faligndatadi", CODE_FOR_faligndatav1di_vis,
  	       di_ftype_di_di);
  
    def_builtin ("__builtin_vis_write_gsr", CODE_FOR_wrgsr_vis,
  	       void_ftype_di);
    def_builtin ("__builtin_vis_read_gsr", CODE_FOR_rdgsr_vis,
  	       di_ftype_void);
  
    if (TARGET_ARCH64)
      {
        def_builtin ("__builtin_vis_alignaddr", CODE_FOR_alignaddrdi_vis,
  		   ptr_ftype_ptr_di);
        def_builtin ("__builtin_vis_alignaddrl", CODE_FOR_alignaddrldi_vis,
  		   ptr_ftype_ptr_di);
      }
    else
      {
        def_builtin ("__builtin_vis_alignaddr", CODE_FOR_alignaddrsi_vis,
  		   ptr_ftype_ptr_si);
        def_builtin ("__builtin_vis_alignaddrl", CODE_FOR_alignaddrlsi_vis,
  		   ptr_ftype_ptr_si);
      }
  
    /* Pixel distance.  */
    def_builtin_const ("__builtin_vis_pdist", CODE_FOR_pdist_vis,
  		     di_ftype_v8qi_v8qi_di);
  
    /* Edge handling.  */
    if (TARGET_ARCH64)
      {
        def_builtin_const ("__builtin_vis_edge8", CODE_FOR_edge8di_vis,
  			 di_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge8l", CODE_FOR_edge8ldi_vis,
  			 di_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge16", CODE_FOR_edge16di_vis,
  			 di_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge16l", CODE_FOR_edge16ldi_vis,
  			 di_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge32", CODE_FOR_edge32di_vis,
  			 di_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge32l", CODE_FOR_edge32ldi_vis,
  			 di_ftype_ptr_ptr);
        if (TARGET_VIS2)
  	{
  	  def_builtin_const ("__builtin_vis_edge8n", CODE_FOR_edge8ndi_vis,
  			     di_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge8ln", CODE_FOR_edge8lndi_vis,
  			     di_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge16n", CODE_FOR_edge16ndi_vis,
  			     di_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge16ln", CODE_FOR_edge16lndi_vis,
  			     di_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge32n", CODE_FOR_edge32ndi_vis,
  			     di_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge32ln", CODE_FOR_edge32lndi_vis,
  			     di_ftype_ptr_ptr);
  	}
      }
    else
      {
        def_builtin_const ("__builtin_vis_edge8", CODE_FOR_edge8si_vis,
  			 si_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge8l", CODE_FOR_edge8lsi_vis,
  			 si_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge16", CODE_FOR_edge16si_vis,
  			 si_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge16l", CODE_FOR_edge16lsi_vis,
  			 si_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge32", CODE_FOR_edge32si_vis,
  			 si_ftype_ptr_ptr);
        def_builtin_const ("__builtin_vis_edge32l", CODE_FOR_edge32lsi_vis,
  			 si_ftype_ptr_ptr);
        if (TARGET_VIS2)
  	{
  	  def_builtin_const ("__builtin_vis_edge8n", CODE_FOR_edge8nsi_vis,
  			     si_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge8ln", CODE_FOR_edge8lnsi_vis,
  			     si_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge16n", CODE_FOR_edge16nsi_vis,
  			     si_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge16ln", CODE_FOR_edge16lnsi_vis,
  			     si_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge32n", CODE_FOR_edge32nsi_vis,
  			     si_ftype_ptr_ptr);
  	  def_builtin_const ("__builtin_vis_edge32ln", CODE_FOR_edge32lnsi_vis,
  			     si_ftype_ptr_ptr);
  	}
      }
  
    /* Pixel compare.  */
    if (TARGET_ARCH64)
      {
        def_builtin_const ("__builtin_vis_fcmple16", CODE_FOR_fcmple16di_vis,
  			 di_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmple32", CODE_FOR_fcmple32di_vis,
  			 di_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpne16", CODE_FOR_fcmpne16di_vis,
  			 di_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpne32", CODE_FOR_fcmpne32di_vis,
  			 di_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpgt16", CODE_FOR_fcmpgt16di_vis,
  			 di_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpgt32", CODE_FOR_fcmpgt32di_vis,
  			 di_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpeq16", CODE_FOR_fcmpeq16di_vis,
  			 di_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpeq32", CODE_FOR_fcmpeq32di_vis,
  			 di_ftype_v2si_v2si);
      }
    else
      {
        def_builtin_const ("__builtin_vis_fcmple16", CODE_FOR_fcmple16si_vis,
  			 si_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmple32", CODE_FOR_fcmple32si_vis,
  			 si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpne16", CODE_FOR_fcmpne16si_vis,
  			 si_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpne32", CODE_FOR_fcmpne32si_vis,
  			 si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpgt16", CODE_FOR_fcmpgt16si_vis,
  			 si_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpgt32", CODE_FOR_fcmpgt32si_vis,
  			 si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fcmpeq16", CODE_FOR_fcmpeq16si_vis,
  			 si_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fcmpeq32", CODE_FOR_fcmpeq32si_vis,
  			 si_ftype_v2si_v2si);
      }
  
    /* Addition and subtraction.  */
    def_builtin_const ("__builtin_vis_fpadd16", CODE_FOR_addv4hi3,
  		     v4hi_ftype_v4hi_v4hi);
    def_builtin_const ("__builtin_vis_fpadd16s", CODE_FOR_addv2hi3,
  		     v2hi_ftype_v2hi_v2hi);
    def_builtin_const ("__builtin_vis_fpadd32", CODE_FOR_addv2si3,
  		     v2si_ftype_v2si_v2si);
    def_builtin_const ("__builtin_vis_fpadd32s", CODE_FOR_addv1si3,
  		     v1si_ftype_v1si_v1si);
    def_builtin_const ("__builtin_vis_fpsub16", CODE_FOR_subv4hi3,
  		     v4hi_ftype_v4hi_v4hi);
    def_builtin_const ("__builtin_vis_fpsub16s", CODE_FOR_subv2hi3,
  		     v2hi_ftype_v2hi_v2hi);
    def_builtin_const ("__builtin_vis_fpsub32", CODE_FOR_subv2si3,
  		     v2si_ftype_v2si_v2si);
    def_builtin_const ("__builtin_vis_fpsub32s", CODE_FOR_subv1si3,
  		     v1si_ftype_v1si_v1si);
  
    /* Three-dimensional array addressing.  */
    if (TARGET_ARCH64)
      {
        def_builtin_const ("__builtin_vis_array8", CODE_FOR_array8di_vis,
  			 di_ftype_di_di);
        def_builtin_const ("__builtin_vis_array16", CODE_FOR_array16di_vis,
  			 di_ftype_di_di);
        def_builtin_const ("__builtin_vis_array32", CODE_FOR_array32di_vis,
  			 di_ftype_di_di);
      }
    else
      {
        def_builtin_const ("__builtin_vis_array8", CODE_FOR_array8si_vis,
  			 si_ftype_si_si);
        def_builtin_const ("__builtin_vis_array16", CODE_FOR_array16si_vis,
  			 si_ftype_si_si);
        def_builtin_const ("__builtin_vis_array32", CODE_FOR_array32si_vis,
  			 si_ftype_si_si);
    }
  
    if (TARGET_VIS2)
      {
        /* Byte mask and shuffle */
        if (TARGET_ARCH64)
  	def_builtin ("__builtin_vis_bmask", CODE_FOR_bmaskdi_vis,
  		     di_ftype_di_di);
        else
  	def_builtin ("__builtin_vis_bmask", CODE_FOR_bmasksi_vis,
  		     si_ftype_si_si);
        def_builtin ("__builtin_vis_bshufflev4hi", CODE_FOR_bshufflev4hi_vis,
  		   v4hi_ftype_v4hi_v4hi);
        def_builtin ("__builtin_vis_bshufflev8qi", CODE_FOR_bshufflev8qi_vis,
  		   v8qi_ftype_v8qi_v8qi);
        def_builtin ("__builtin_vis_bshufflev2si", CODE_FOR_bshufflev2si_vis,
  		   v2si_ftype_v2si_v2si);
        def_builtin ("__builtin_vis_bshuffledi", CODE_FOR_bshufflev1di_vis,
  		   di_ftype_di_di);
      }
  
    if (TARGET_VIS3)
      {
        if (TARGET_ARCH64)
  	{
  	  def_builtin ("__builtin_vis_cmask8", CODE_FOR_cmask8di_vis,
  		       void_ftype_di);
  	  def_builtin ("__builtin_vis_cmask16", CODE_FOR_cmask16di_vis,
  		       void_ftype_di);
  	  def_builtin ("__builtin_vis_cmask32", CODE_FOR_cmask32di_vis,
  		       void_ftype_di);
  	}
        else
  	{
  	  def_builtin ("__builtin_vis_cmask8", CODE_FOR_cmask8si_vis,
  		       void_ftype_si);
  	  def_builtin ("__builtin_vis_cmask16", CODE_FOR_cmask16si_vis,
  		       void_ftype_si);
  	  def_builtin ("__builtin_vis_cmask32", CODE_FOR_cmask32si_vis,
  		       void_ftype_si);
  	}
  
        def_builtin_const ("__builtin_vis_fchksm16", CODE_FOR_fchksm16_vis,
  			 v4hi_ftype_v4hi_v4hi);
  
        def_builtin_const ("__builtin_vis_fsll16", CODE_FOR_vashlv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fslas16", CODE_FOR_vssashlv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fsrl16", CODE_FOR_vlshrv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fsra16", CODE_FOR_vashrv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fsll32", CODE_FOR_vashlv2si3,
  			 v2si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fslas32", CODE_FOR_vssashlv2si3,
  			 v2si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fsrl32", CODE_FOR_vlshrv2si3,
  			 v2si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fsra32", CODE_FOR_vashrv2si3,
  			 v2si_ftype_v2si_v2si);
  
        if (TARGET_ARCH64)
  	def_builtin_const ("__builtin_vis_pdistn", CODE_FOR_pdistndi_vis,
  			   di_ftype_v8qi_v8qi);
        else
  	def_builtin_const ("__builtin_vis_pdistn", CODE_FOR_pdistnsi_vis,
  			   si_ftype_v8qi_v8qi);
  
        def_builtin_const ("__builtin_vis_fmean16", CODE_FOR_fmean16_vis,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fpadd64", CODE_FOR_fpadd64_vis,
  			 di_ftype_di_di);
        def_builtin_const ("__builtin_vis_fpsub64", CODE_FOR_fpsub64_vis,
  			 di_ftype_di_di);
  
        def_builtin_const ("__builtin_vis_fpadds16", CODE_FOR_ssaddv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fpadds16s", CODE_FOR_ssaddv2hi3,
  			 v2hi_ftype_v2hi_v2hi);
        def_builtin_const ("__builtin_vis_fpsubs16", CODE_FOR_sssubv4hi3,
  			 v4hi_ftype_v4hi_v4hi);
        def_builtin_const ("__builtin_vis_fpsubs16s", CODE_FOR_sssubv2hi3,
  			 v2hi_ftype_v2hi_v2hi);
        def_builtin_const ("__builtin_vis_fpadds32", CODE_FOR_ssaddv2si3,
  			 v2si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fpadds32s", CODE_FOR_ssaddv1si3,
  			 v1si_ftype_v1si_v1si);
        def_builtin_const ("__builtin_vis_fpsubs32", CODE_FOR_sssubv2si3,
  			 v2si_ftype_v2si_v2si);
        def_builtin_const ("__builtin_vis_fpsubs32s", CODE_FOR_sssubv1si3,
  			 v1si_ftype_v1si_v1si);
  
        if (TARGET_ARCH64)
  	{
  	  def_builtin_const ("__builtin_vis_fucmple8", CODE_FOR_fucmple8di_vis,
  			     di_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpne8", CODE_FOR_fucmpne8di_vis,
  			     di_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpgt8", CODE_FOR_fucmpgt8di_vis,
  			     di_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpeq8", CODE_FOR_fucmpeq8di_vis,
  			     di_ftype_v8qi_v8qi);
  	}
        else
  	{
  	  def_builtin_const ("__builtin_vis_fucmple8", CODE_FOR_fucmple8si_vis,
  			     si_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpne8", CODE_FOR_fucmpne8si_vis,
  			     si_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpgt8", CODE_FOR_fucmpgt8si_vis,
  			     si_ftype_v8qi_v8qi);
  	  def_builtin_const ("__builtin_vis_fucmpeq8", CODE_FOR_fucmpeq8si_vis,
  			     si_ftype_v8qi_v8qi);
  	}
  
        def_builtin_const ("__builtin_vis_fhadds", CODE_FOR_fhaddsf_vis,
  			 sf_ftype_sf_sf);
        def_builtin_const ("__builtin_vis_fhaddd", CODE_FOR_fhadddf_vis,
  			 df_ftype_df_df);
        def_builtin_const ("__builtin_vis_fhsubs", CODE_FOR_fhsubsf_vis,
  			 sf_ftype_sf_sf);
        def_builtin_const ("__builtin_vis_fhsubd", CODE_FOR_fhsubdf_vis,
  			 df_ftype_df_df);
        def_builtin_const ("__builtin_vis_fnhadds", CODE_FOR_fnhaddsf_vis,
  			 sf_ftype_sf_sf);
        def_builtin_const ("__builtin_vis_fnhaddd", CODE_FOR_fnhadddf_vis,
  			 df_ftype_df_df);
  
        def_builtin_const ("__builtin_vis_umulxhi", CODE_FOR_umulxhi_vis,
  			 di_ftype_di_di);
        def_builtin_const ("__builtin_vis_xmulx", CODE_FOR_xmulx_vis,
  			 di_ftype_di_di);
        def_builtin_const ("__builtin_vis_xmulxhi", CODE_FOR_xmulxhi_vis,
  			 di_ftype_di_di);
      }
  }
  
  /* Handle TARGET_EXPAND_BUILTIN target hook.
     Expand builtin functions for sparc intrinsics.  */
  
  static rtx
  sparc_expand_builtin (tree exp, rtx target,
  		      rtx subtarget ATTRIBUTE_UNUSED,
  		      enum machine_mode tmode ATTRIBUTE_UNUSED,
  		      int ignore ATTRIBUTE_UNUSED)
  {
    tree arg;
    call_expr_arg_iterator iter;
    tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
    unsigned int icode = DECL_FUNCTION_CODE (fndecl);
    rtx pat, op[4];
    int arg_count = 0;
    bool nonvoid;
  
    nonvoid = TREE_TYPE (TREE_TYPE (fndecl)) != void_type_node;
  
    if (nonvoid)
      {
        enum machine_mode tmode = insn_data[icode].operand[0].mode;
        if (!target
  	  || GET_MODE (target) != tmode
  	  || ! (*insn_data[icode].operand[0].predicate) (target, tmode))
  	op[0] = gen_reg_rtx (tmode);
        else
  	op[0] = target;
      }
    FOR_EACH_CALL_EXPR_ARG (arg, iter, exp)
      {
        const struct insn_operand_data *insn_op;
        int idx;
  
        if (arg == error_mark_node)
  	return NULL_RTX;
  
        arg_count++;
        idx = arg_count - !nonvoid;
        insn_op = &insn_data[icode].operand[idx];
        op[arg_count] = expand_normal (arg);
  
        if (insn_op->mode == V1DImode
  	  && GET_MODE (op[arg_count]) == DImode)
  	op[arg_count] = gen_lowpart (V1DImode, op[arg_count]);
        else if (insn_op->mode == V1SImode
  	  && GET_MODE (op[arg_count]) == SImode)
  	op[arg_count] = gen_lowpart (V1SImode, op[arg_count]);
  
        if (! (*insn_data[icode].operand[idx].predicate) (op[arg_count],
  							insn_op->mode))
  	op[arg_count] = copy_to_mode_reg (insn_op->mode, op[arg_count]);
      }
  
    switch (arg_count)
      {
      case 0:
        pat = GEN_FCN (icode) (op[0]);
        break;
      case 1:
        if (nonvoid)
  	pat = GEN_FCN (icode) (op[0], op[1]);
        else
  	pat = GEN_FCN (icode) (op[1]);
        break;
      case 2:
        pat = GEN_FCN (icode) (op[0], op[1], op[2]);
        break;
      case 3:
        pat = GEN_FCN (icode) (op[0], op[1], op[2], op[3]);
        break;
      default:
        gcc_unreachable ();
      }
  
    if (!pat)
      return NULL_RTX;
  
    emit_insn (pat);
  
    if (nonvoid)
      return op[0];
    else
      return const0_rtx;
  }
  
  static int
  sparc_vis_mul8x16 (int e8, int e16)
  {
    return (e8 * e16 + 128) / 256;
  }
  
  /* Multiply the vector elements in ELTS0 to the elements in ELTS1 as specified
     by FNCODE.  All of the elements in ELTS0 and ELTS1 lists must be integer
     constants.  A tree list with the results of the multiplications is returned,
     and each element in the list is of INNER_TYPE.  */
  
  static tree
  sparc_handle_vis_mul8x16 (int fncode, tree inner_type, tree elts0, tree elts1)
  {
    tree n_elts = NULL_TREE;
    int scale;
  
    switch (fncode)
      {
      case CODE_FOR_fmul8x16_vis:
        for (; elts0 && elts1;
  	   elts0 = TREE_CHAIN (elts0), elts1 = TREE_CHAIN (elts1))
  	{
  	  int val
  	    = sparc_vis_mul8x16 (TREE_INT_CST_LOW (TREE_VALUE (elts0)),
  				 TREE_INT_CST_LOW (TREE_VALUE (elts1)));
  	  n_elts = tree_cons (NULL_TREE,
  			      build_int_cst (inner_type, val),
  			      n_elts);
  	}
        break;
  
      case CODE_FOR_fmul8x16au_vis:
        scale = TREE_INT_CST_LOW (TREE_VALUE (elts1));
  
        for (; elts0; elts0 = TREE_CHAIN (elts0))
  	{
  	  int val
  	    = sparc_vis_mul8x16 (TREE_INT_CST_LOW (TREE_VALUE (elts0)),
  				 scale);
  	  n_elts = tree_cons (NULL_TREE,
  			      build_int_cst (inner_type, val),
  			      n_elts);
  	}
        break;
  
      case CODE_FOR_fmul8x16al_vis:
        scale = TREE_INT_CST_LOW (TREE_VALUE (TREE_CHAIN (elts1)));
  
        for (; elts0; elts0 = TREE_CHAIN (elts0))
  	{
  	  int val
  	    = sparc_vis_mul8x16 (TREE_INT_CST_LOW (TREE_VALUE (elts0)),
  				 scale);
  	  n_elts = tree_cons (NULL_TREE,
  			      build_int_cst (inner_type, val),
  			      n_elts);
  	}
        break;
  
      default:
        gcc_unreachable ();
      }
  
    return nreverse (n_elts);
  
  }
  /* Handle TARGET_FOLD_BUILTIN target hook.
     Fold builtin functions for SPARC intrinsics.  If IGNORE is true the
     result of the function call is ignored.  NULL_TREE is returned if the
     function could not be folded.  */
  
  static tree
  sparc_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED,
  		    tree *args, bool ignore)
  {
    tree arg0, arg1, arg2;
    tree rtype = TREE_TYPE (TREE_TYPE (fndecl));
    enum insn_code icode = (enum insn_code) DECL_FUNCTION_CODE (fndecl);
  
    if (ignore)
      {
        /* Note that a switch statement instead of the sequence of tests would
  	 be incorrect as many of the CODE_FOR values could be CODE_FOR_nothing
  	 and that would yield multiple alternatives with identical values.  */
        if (icode == CODE_FOR_alignaddrsi_vis
  	  || icode == CODE_FOR_alignaddrdi_vis
  	  || icode == CODE_FOR_wrgsr_vis
  	  || icode == CODE_FOR_bmasksi_vis
  	  || icode == CODE_FOR_bmaskdi_vis
  	  || icode == CODE_FOR_cmask8si_vis
  	  || icode == CODE_FOR_cmask8di_vis
  	  || icode == CODE_FOR_cmask16si_vis
  	  || icode == CODE_FOR_cmask16di_vis
  	  || icode == CODE_FOR_cmask32si_vis
  	  || icode == CODE_FOR_cmask32di_vis)
  	;
        else
  	return build_zero_cst (rtype);
      }
  
    switch (icode)
      {
      case CODE_FOR_fexpand_vis:
        arg0 = args[0];
        STRIP_NOPS (arg0);
  
        if (TREE_CODE (arg0) == VECTOR_CST)
  	{
  	  tree inner_type = TREE_TYPE (rtype);
  	  tree elts = TREE_VECTOR_CST_ELTS (arg0);
  	  tree n_elts = NULL_TREE;
  
  	  for (; elts; elts = TREE_CHAIN (elts))
  	    {
  	      unsigned int val = TREE_INT_CST_LOW (TREE_VALUE (elts)) << 4;
  	      n_elts = tree_cons (NULL_TREE,
  				  build_int_cst (inner_type, val),
  				  n_elts);
  	    }
  	  return build_vector (rtype, nreverse (n_elts));
  	}
        break;
  
      case CODE_FOR_fmul8x16_vis:
      case CODE_FOR_fmul8x16au_vis:
      case CODE_FOR_fmul8x16al_vis:
        arg0 = args[0];
        arg1 = args[1];
        STRIP_NOPS (arg0);
        STRIP_NOPS (arg1);
  
        if (TREE_CODE (arg0) == VECTOR_CST && TREE_CODE (arg1) == VECTOR_CST)
  	{
  	  tree inner_type = TREE_TYPE (rtype);
  	  tree elts0 = TREE_VECTOR_CST_ELTS (arg0);
  	  tree elts1 = TREE_VECTOR_CST_ELTS (arg1);
  	  tree n_elts = sparc_handle_vis_mul8x16 (icode, inner_type, elts0,
  						  elts1);
  
  	  return build_vector (rtype, n_elts);
  	}
        break;
  
      case CODE_FOR_fpmerge_vis:
        arg0 = args[0];
        arg1 = args[1];
        STRIP_NOPS (arg0);
        STRIP_NOPS (arg1);
  
        if (TREE_CODE (arg0) == VECTOR_CST && TREE_CODE (arg1) == VECTOR_CST)
  	{
  	  tree elts0 = TREE_VECTOR_CST_ELTS (arg0);
  	  tree elts1 = TREE_VECTOR_CST_ELTS (arg1);
  	  tree n_elts = NULL_TREE;
  
  	  for (; elts0 && elts1;
  	       elts0 = TREE_CHAIN (elts0), elts1 = TREE_CHAIN (elts1))
  	    {
  	      n_elts = tree_cons (NULL_TREE, TREE_VALUE (elts0), n_elts);
  	      n_elts = tree_cons (NULL_TREE, TREE_VALUE (elts1), n_elts);
  	    }
  
  	  return build_vector (rtype, nreverse (n_elts));
  	}
        break;
  
      case CODE_FOR_pdist_vis:
        arg0 = args[0];
        arg1 = args[1];
        arg2 = args[2];
        STRIP_NOPS (arg0);
        STRIP_NOPS (arg1);
        STRIP_NOPS (arg2);
  
        if (TREE_CODE (arg0) == VECTOR_CST
  	  && TREE_CODE (arg1) == VECTOR_CST
  	  && TREE_CODE (arg2) == INTEGER_CST)
  	{
  	  int overflow = 0;
  	  unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (arg2);
  	  HOST_WIDE_INT high = TREE_INT_CST_HIGH (arg2);
  	  tree elts0 = TREE_VECTOR_CST_ELTS (arg0);
  	  tree elts1 = TREE_VECTOR_CST_ELTS (arg1);
  
  	  for (; elts0 && elts1;
  	       elts0 = TREE_CHAIN (elts0), elts1 = TREE_CHAIN (elts1))
  	    {
  	      unsigned HOST_WIDE_INT
  		low0 = TREE_INT_CST_LOW (TREE_VALUE (elts0)),
  		low1 = TREE_INT_CST_LOW (TREE_VALUE (elts1));
  	      HOST_WIDE_INT high0 = TREE_INT_CST_HIGH (TREE_VALUE (elts0));
  	      HOST_WIDE_INT high1 = TREE_INT_CST_HIGH (TREE_VALUE (elts1));
  
  	      unsigned HOST_WIDE_INT l;
  	      HOST_WIDE_INT h;
  
  	      overflow |= neg_double (low1, high1, &l, &h);
  	      overflow |= add_double (low0, high0, l, h, &l, &h);
  	      if (h < 0)
  		overflow |= neg_double (l, h, &l, &h);
  
  	      overflow |= add_double (low, high, l, h, &low, &high);
  	    }
  
  	  gcc_assert (overflow == 0);
  
  	  return build_int_cst_wide (rtype, low, high);
  	}
  
      default:
        break;
      }
  
    return NULL_TREE;
  }
  
  /* ??? This duplicates information provided to the compiler by the
     ??? scheduler description.  Some day, teach genautomata to output
     ??? the latencies and then CSE will just use that.  */
  
  static bool
  sparc_rtx_costs (rtx x, int code, int outer_code, int opno ATTRIBUTE_UNUSED,
  		 int *total, bool speed ATTRIBUTE_UNUSED)
  {
    enum machine_mode mode = GET_MODE (x);
    bool float_mode_p = FLOAT_MODE_P (mode);
  
    switch (code)
      {
      case CONST_INT:
        if (INTVAL (x) < 0x1000 && INTVAL (x) >= -0x1000)
  	{
  	  *total = 0;
  	  return true;
  	}
        /* FALLTHRU */
  
      case HIGH:
        *total = 2;
        return true;
  
      case CONST:
      case LABEL_REF:
      case SYMBOL_REF:
        *total = 4;
        return true;
  
      case CONST_DOUBLE:
        if (GET_MODE (x) == VOIDmode
  	  && ((CONST_DOUBLE_HIGH (x) == 0
  	       && CONST_DOUBLE_LOW (x) < 0x1000)
  	      || (CONST_DOUBLE_HIGH (x) == -1
  		  && CONST_DOUBLE_LOW (x) < 0
  		  && CONST_DOUBLE_LOW (x) >= -0x1000)))
  	*total = 0;
        else
  	*total = 8;
        return true;
  
      case MEM:
        /* If outer-code was a sign or zero extension, a cost
  	 of COSTS_N_INSNS (1) was already added in.  This is
  	 why we are subtracting it back out.  */
        if (outer_code == ZERO_EXTEND)
  	{
  	  *total = sparc_costs->int_zload - COSTS_N_INSNS (1);
  	}
        else if (outer_code == SIGN_EXTEND)
  	{
  	  *total = sparc_costs->int_sload - COSTS_N_INSNS (1);
  	}
        else if (float_mode_p)
  	{
  	  *total = sparc_costs->float_load;
  	}
        else
  	{
  	  *total = sparc_costs->int_load;
  	}
  
        return true;
  
      case PLUS:
      case MINUS:
        if (float_mode_p)
  	*total = sparc_costs->float_plusminus;
        else
  	*total = COSTS_N_INSNS (1);
        return false;
  
      case FMA:
        {
  	rtx sub;
  
  	gcc_assert (float_mode_p);
  	*total = sparc_costs->float_mul;
  
  	sub = XEXP (x, 0);
  	if (GET_CODE (sub) == NEG)
  	  sub = XEXP (sub, 0);
  	*total += rtx_cost (sub, FMA, 0, speed);
  
  	sub = XEXP (x, 2);
  	if (GET_CODE (sub) == NEG)
  	  sub = XEXP (sub, 0);
  	*total += rtx_cost (sub, FMA, 2, speed);
  	return true;
        }
  
      case MULT:
        if (float_mode_p)
  	*total = sparc_costs->float_mul;
        else if (! TARGET_HARD_MUL)
  	*total = COSTS_N_INSNS (25);
        else
  	{
  	  int bit_cost;
  
  	  bit_cost = 0;
  	  if (sparc_costs->int_mul_bit_factor)
  	    {
  	      int nbits;
  
  	      if (GET_CODE (XEXP (x, 1)) == CONST_INT)
  		{
  		  unsigned HOST_WIDE_INT value = INTVAL (XEXP (x, 1));
  		  for (nbits = 0; value != 0; value &= value - 1)
  		    nbits++;
  		}
  	      else if (GET_CODE (XEXP (x, 1)) == CONST_DOUBLE
  		       && GET_MODE (XEXP (x, 1)) == VOIDmode)
  		{
  		  rtx x1 = XEXP (x, 1);
  		  unsigned HOST_WIDE_INT value1 = CONST_DOUBLE_LOW (x1);
  		  unsigned HOST_WIDE_INT value2 = CONST_DOUBLE_HIGH (x1);
  
  		  for (nbits = 0; value1 != 0; value1 &= value1 - 1)
  		    nbits++;
  		  for (; value2 != 0; value2 &= value2 - 1)
  		    nbits++;
  		}
  	      else
  		nbits = 7;
  
  	      if (nbits < 3)
  		nbits = 3;
  	      bit_cost = (nbits - 3) / sparc_costs->int_mul_bit_factor;
  	      bit_cost = COSTS_N_INSNS (bit_cost);
  	    }
  
  	  if (mode == DImode)
  	    *total = sparc_costs->int_mulX + bit_cost;
  	  else
  	    *total = sparc_costs->int_mul + bit_cost;
  	}
        return false;
  
      case ASHIFT:
      case ASHIFTRT:
      case LSHIFTRT:
        *total = COSTS_N_INSNS (1) + sparc_costs->shift_penalty;
        return false;
  
      case DIV:
      case UDIV:
      case MOD:
      case UMOD:
        if (float_mode_p)
  	{
  	  if (mode == DFmode)
  	    *total = sparc_costs->float_div_df;
  	  else
  	    *total = sparc_costs->float_div_sf;
  	}
        else
  	{
  	  if (mode == DImode)
  	    *total = sparc_costs->int_divX;
  	  else
  	    *total = sparc_costs->int_div;
  	}
        return false;
  
      case NEG:
        if (! float_mode_p)
  	{
  	  *total = COSTS_N_INSNS (1);
  	  return false;
  	}
        /* FALLTHRU */
  
      case ABS:
      case FLOAT:
      case UNSIGNED_FLOAT:
      case FIX:
      case UNSIGNED_FIX:
      case FLOAT_EXTEND:
      case FLOAT_TRUNCATE:
        *total = sparc_costs->float_move;
        return false;
  
      case SQRT:
        if (mode == DFmode)
  	*total = sparc_costs->float_sqrt_df;
        else
  	*total = sparc_costs->float_sqrt_sf;
        return false;
  
      case COMPARE:
        if (float_mode_p)
  	*total = sparc_costs->float_cmp;
        else
  	*total = COSTS_N_INSNS (1);
        return false;
  
      case IF_THEN_ELSE:
        if (float_mode_p)
  	*total = sparc_costs->float_cmove;
        else
  	*total = sparc_costs->int_cmove;
        return false;
  
      case IOR:
        /* Handle the NAND vector patterns.  */
        if (sparc_vector_mode_supported_p (GET_MODE (x))
  	  && GET_CODE (XEXP (x, 0)) == NOT
  	  && GET_CODE (XEXP (x, 1)) == NOT)
  	{
  	  *total = COSTS_N_INSNS (1);
  	  return true;
  	}
        else
          return false;
  
      default:
        return false;
      }
  }
  
  /* Return true if CLASS is either GENERAL_REGS or I64_REGS.  */
  
  static inline bool
  general_or_i64_p (reg_class_t rclass)
  {
    return (rclass == GENERAL_REGS || rclass == I64_REGS);
  }
  
  /* Implement TARGET_REGISTER_MOVE_COST.  */
  
  static int
  sparc_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
  			  reg_class_t from, reg_class_t to)
  {
    bool need_memory = false;
  
    if (from == FPCC_REGS || to == FPCC_REGS)
      need_memory = true;
    else if ((FP_REG_CLASS_P (from) && general_or_i64_p (to))
  	   || (general_or_i64_p (from) && FP_REG_CLASS_P (to)))
      {
        if (TARGET_VIS3)
  	{
  	  int size = GET_MODE_SIZE (mode);
  	  if (size == 8 || size == 4)
  	    {
  	      if (! TARGET_ARCH32 || size == 4)
  		return 4;
  	      else
  		return 6;
  	    }
  	}
        need_memory = true;
      }
  
    if (need_memory)
      {
        if (sparc_cpu == PROCESSOR_ULTRASPARC
  	  || sparc_cpu == PROCESSOR_ULTRASPARC3
  	  || sparc_cpu == PROCESSOR_NIAGARA
  	  || sparc_cpu == PROCESSOR_NIAGARA2
  	  || sparc_cpu == PROCESSOR_NIAGARA3
  	  || sparc_cpu == PROCESSOR_NIAGARA4)
  	return 12;
  
        return 6;
      }
  
    return 2;
  }
  
  /* Emit the sequence of insns SEQ while preserving the registers REG and REG2.
     This is achieved by means of a manual dynamic stack space allocation in
     the current frame.  We make the assumption that SEQ doesn't contain any
     function calls, with the possible exception of calls to the GOT helper.  */
  
  static void
  emit_and_preserve (rtx seq, rtx reg, rtx reg2)
  {
    /* We must preserve the lowest 16 words for the register save area.  */
    HOST_WIDE_INT offset = 16*UNITS_PER_WORD;
    /* We really need only 2 words of fresh stack space.  */
    HOST_WIDE_INT size = SPARC_STACK_ALIGN (offset + 2*UNITS_PER_WORD);
  
    rtx slot
      = gen_rtx_MEM (word_mode, plus_constant (stack_pointer_rtx,
  					     SPARC_STACK_BIAS + offset));
  
    emit_insn (gen_stack_pointer_dec (GEN_INT (size)));
    emit_insn (gen_rtx_SET (VOIDmode, slot, reg));
    if (reg2)
      emit_insn (gen_rtx_SET (VOIDmode,
  			    adjust_address (slot, word_mode, UNITS_PER_WORD),
  			    reg2));
    emit_insn (seq);
    if (reg2)
      emit_insn (gen_rtx_SET (VOIDmode,
  			    reg2,
  			    adjust_address (slot, word_mode, UNITS_PER_WORD)));
    emit_insn (gen_rtx_SET (VOIDmode, reg, slot));
    emit_insn (gen_stack_pointer_inc (GEN_INT (size)));
  }
  
  /* Output the assembler code for a thunk function.  THUNK_DECL is the
     declaration for the thunk function itself, FUNCTION is the decl for
     the target function.  DELTA is an immediate constant offset to be
     added to THIS.  If VCALL_OFFSET is nonzero, the word at address
     (*THIS + VCALL_OFFSET) should be additionally added to THIS.  */
  
  static void
  sparc_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
  		       HOST_WIDE_INT delta, HOST_WIDE_INT vcall_offset,
  		       tree function)
  {
    rtx this_rtx, insn, funexp;
    unsigned int int_arg_first;
  
    reload_completed = 1;
    epilogue_completed = 1;
  
    emit_note (NOTE_INSN_PROLOGUE_END);
  
    if (TARGET_FLAT)
      {
        sparc_leaf_function_p = 1;
  
        int_arg_first = SPARC_OUTGOING_INT_ARG_FIRST;
      }
    else if (flag_delayed_branch)
      {
        /* We will emit a regular sibcall below, so we need to instruct
  	 output_sibcall that we are in a leaf function.  */
        sparc_leaf_function_p = current_function_uses_only_leaf_regs = 1;
  
        /* This will cause final.c to invoke leaf_renumber_regs so we
  	 must behave as if we were in a not-yet-leafified function.  */
        int_arg_first = SPARC_INCOMING_INT_ARG_FIRST;
      }
    else
      {
        /* We will emit the sibcall manually below, so we will need to
  	 manually spill non-leaf registers.  */
        sparc_leaf_function_p = current_function_uses_only_leaf_regs = 0;
  
        /* We really are in a leaf function.  */
        int_arg_first = SPARC_OUTGOING_INT_ARG_FIRST;
      }
  
    /* Find the "this" pointer.  Normally in %o0, but in ARCH64 if the function
       returns a structure, the structure return pointer is there instead.  */
    if (TARGET_ARCH64
        && aggregate_value_p (TREE_TYPE (TREE_TYPE (function)), function))
      this_rtx = gen_rtx_REG (Pmode, int_arg_first + 1);
    else
      this_rtx = gen_rtx_REG (Pmode, int_arg_first);
  
    /* Add DELTA.  When possible use a plain add, otherwise load it into
       a register first.  */
    if (delta)
      {
        rtx delta_rtx = GEN_INT (delta);
  
        if (! SPARC_SIMM13_P (delta))
  	{
  	  rtx scratch = gen_rtx_REG (Pmode, 1);
  	  emit_move_insn (scratch, delta_rtx);
  	  delta_rtx = scratch;
  	}
  
        /* THIS_RTX += DELTA.  */
        emit_insn (gen_add2_insn (this_rtx, delta_rtx));
      }
  
    /* Add the word at address (*THIS_RTX + VCALL_OFFSET).  */
    if (vcall_offset)
      {
        rtx vcall_offset_rtx = GEN_INT (vcall_offset);
        rtx scratch = gen_rtx_REG (Pmode, 1);
  
        gcc_assert (vcall_offset < 0);
  
        /* SCRATCH = *THIS_RTX.  */
        emit_move_insn (scratch, gen_rtx_MEM (Pmode, this_rtx));
  
        /* Prepare for adding VCALL_OFFSET.  The difficulty is that we
  	 may not have any available scratch register at this point.  */
        if (SPARC_SIMM13_P (vcall_offset))
  	;
        /* This is the case if ARCH64 (unless -ffixed-g5 is passed).  */
        else if (! fixed_regs[5]
  	       /* The below sequence is made up of at least 2 insns,
  		  while the default method may need only one.  */
  	       && vcall_offset < -8192)
  	{
  	  rtx scratch2 = gen_rtx_REG (Pmode, 5);
  	  emit_move_insn (scratch2, vcall_offset_rtx);
  	  vcall_offset_rtx = scratch2;
  	}
        else
  	{
  	  rtx increment = GEN_INT (-4096);
  
  	  /* VCALL_OFFSET is a negative number whose typical range can be
  	     estimated as -32768..0 in 32-bit mode.  In almost all cases
  	     it is therefore cheaper to emit multiple add insns than
  	     spilling and loading the constant into a register (at least
  	     6 insns).  */
  	  while (! SPARC_SIMM13_P (vcall_offset))
  	    {
  	      emit_insn (gen_add2_insn (scratch, increment));
  	      vcall_offset += 4096;
  	    }
  	  vcall_offset_rtx = GEN_INT (vcall_offset); /* cannot be 0 */
  	}
  
        /* SCRATCH = *(*THIS_RTX + VCALL_OFFSET).  */
        emit_move_insn (scratch, gen_rtx_MEM (Pmode,
  					    gen_rtx_PLUS (Pmode,
  							  scratch,
  							  vcall_offset_rtx)));
  
        /* THIS_RTX += *(*THIS_RTX + VCALL_OFFSET).  */
        emit_insn (gen_add2_insn (this_rtx, scratch));
      }
  
    /* Generate a tail call to the target function.  */
    if (! TREE_USED (function))
      {
        assemble_external (function);
        TREE_USED (function) = 1;
      }
    funexp = XEXP (DECL_RTL (function), 0);
  
    if (flag_delayed_branch)
      {
        funexp = gen_rtx_MEM (FUNCTION_MODE, funexp);
        insn = emit_call_insn (gen_sibcall (funexp));
        SIBLING_CALL_P (insn) = 1;
      }
    else
      {
        /* The hoops we have to jump through in order to generate a sibcall
  	 without using delay slots...  */
        rtx spill_reg, seq, scratch = gen_rtx_REG (Pmode, 1);
  
        if (flag_pic)
          {
  	  spill_reg = gen_rtx_REG (word_mode, 15);  /* %o7 */
  	  start_sequence ();
  	  load_got_register ();  /* clobbers %o7 */
  	  scratch = sparc_legitimize_pic_address (funexp, scratch);
  	  seq = get_insns ();
  	  end_sequence ();
  	  emit_and_preserve (seq, spill_reg, pic_offset_table_rtx);
  	}
        else if (TARGET_ARCH32)
  	{
  	  emit_insn (gen_rtx_SET (VOIDmode,
  				  scratch,
  				  gen_rtx_HIGH (SImode, funexp)));
  	  emit_insn (gen_rtx_SET (VOIDmode,
  				  scratch,
  				  gen_rtx_LO_SUM (SImode, scratch, funexp)));
  	}
        else  /* TARGET_ARCH64 */
          {
  	  switch (sparc_cmodel)
  	    {
  	    case CM_MEDLOW:
  	    case CM_MEDMID:
  	      /* The destination can serve as a temporary.  */
  	      sparc_emit_set_symbolic_const64 (scratch, funexp, scratch);
  	      break;
  
  	    case CM_MEDANY:
  	    case CM_EMBMEDANY:
  	      /* The destination cannot serve as a temporary.  */
  	      spill_reg = gen_rtx_REG (DImode, 15);  /* %o7 */
  	      start_sequence ();
  	      sparc_emit_set_symbolic_const64 (scratch, funexp, spill_reg);
  	      seq = get_insns ();
  	      end_sequence ();
  	      emit_and_preserve (seq, spill_reg, 0);
  	      break;
  
  	    default:
  	      gcc_unreachable ();
  	    }
  	}
  
        emit_jump_insn (gen_indirect_jump (scratch));
      }
  
    emit_barrier ();
  
    /* Run just enough of rest_of_compilation to get the insns emitted.
       There's not really enough bulk here to make other passes such as
       instruction scheduling worth while.  Note that use_thunk calls
       assemble_start_function and assemble_end_function.  */
    insn = get_insns ();
    insn_locators_alloc ();
    shorten_branches (insn);
    final_start_function (insn, file, 1);
    final (insn, file, 1);
    final_end_function ();
  
    reload_completed = 0;
    epilogue_completed = 0;
  }
  
  /* Return true if sparc_output_mi_thunk would be able to output the
     assembler code for the thunk function specified by the arguments
     it is passed, and false otherwise.  */
  static bool
  sparc_can_output_mi_thunk (const_tree thunk_fndecl ATTRIBUTE_UNUSED,
  			   HOST_WIDE_INT delta ATTRIBUTE_UNUSED,
  			   HOST_WIDE_INT vcall_offset,
  			   const_tree function ATTRIBUTE_UNUSED)
  {
    /* Bound the loop used in the default method above.  */
    return (vcall_offset >= -32768 || ! fixed_regs[5]);
  }
  
  /* We use the machine specific reorg pass to enable workarounds for errata.  */
  
  static void
  sparc_reorg (void)
  {
    rtx insn, next;
  
    /* The only erratum we handle for now is that of the AT697F processor.  */
    if (!sparc_fix_at697f)
      return;
  
    /* We need to have the (essentially) final form of the insn stream in order
       to properly detect the various hazards.  Run delay slot scheduling.  */
    if (optimize > 0 && flag_delayed_branch)
      {
        cleanup_barriers ();
        dbr_schedule (get_insns ());
      }
  
    /* Now look for specific patterns in the insn stream.  */
    for (insn = get_insns (); insn; insn = next)
      {
        bool insert_nop = false;
        rtx set;
  
        /* Look for a single-word load into an odd-numbered FP register.  */
        if (NONJUMP_INSN_P (insn)
  	  && (set = single_set (insn)) != NULL_RTX
  	  && GET_MODE_SIZE (GET_MODE (SET_SRC (set))) == 4
  	  && MEM_P (SET_SRC (set))
  	  && REG_P (SET_DEST (set))
  	  && REGNO (SET_DEST (set)) > 31
  	  && REGNO (SET_DEST (set)) % 2 != 0)
  	{
  	  /* The wrong dependency is on the enclosing double register.  */
  	  unsigned int x = REGNO (SET_DEST (set)) - 1;
  	  unsigned int src1, src2, dest;
  	  int code;
  
  	  /* If the insn has a delay slot, then it cannot be problematic.  */
  	  next = next_active_insn (insn);
  	  if (NONJUMP_INSN_P (next) && GET_CODE (PATTERN (next)) == SEQUENCE)
  	    code = -1;
  	  else
  	    {
  	      extract_insn (next);
  	      code = INSN_CODE (next);
  	    }
  
  	  switch (code)
  	    {
  	    case CODE_FOR_adddf3:
  	    case CODE_FOR_subdf3:
  	    case CODE_FOR_muldf3:
  	    case CODE_FOR_divdf3:
  	      dest = REGNO (recog_data.operand[0]);
  	      src1 = REGNO (recog_data.operand[1]);
  	      src2 = REGNO (recog_data.operand[2]);
  	      if (src1 != src2)
  		{
  		  /* Case [1-4]:
  				 ld [address], %fx+1
  				 FPOPd %f{x,y}, %f{y,x}, %f{x,y}  */
  		  if ((src1 == x || src2 == x)
  		      && (dest == src1 || dest == src2))
  		    insert_nop = true;
  		}
  	      else
  		{
  		  /* Case 5:
  			     ld [address], %fx+1
  			     FPOPd %fx, %fx, %fx  */
  		  if (src1 == x
  		      && dest == src1
  		      && (code == CODE_FOR_adddf3 || code == CODE_FOR_muldf3))
  		    insert_nop = true;
  		}
  	      break;
  
  	    case CODE_FOR_sqrtdf2:
  	      dest = REGNO (recog_data.operand[0]);
  	      src1 = REGNO (recog_data.operand[1]);
  	      /* Case 6:
  			 ld [address], %fx+1
  			 fsqrtd %fx, %fx  */
  	      if (src1 == x && dest == src1)
  		insert_nop = true;
  	      break;
  
  	    default:
  	      break;
  	    }
  	}
        else
  	next = NEXT_INSN (insn);
  
        if (insert_nop)
  	emit_insn_after (gen_nop (), insn);
      }
  }
  
  /* How to allocate a 'struct machine_function'.  */
  
  static struct machine_function *
  sparc_init_machine_status (void)
  {
    return ggc_alloc_cleared_machine_function ();
  }
  
  /* Locate some local-dynamic symbol still in use by this function
     so that we can print its name in local-dynamic base patterns.  */
  
  static const char *
  get_some_local_dynamic_name (void)
  {
    rtx insn;
  
    if (cfun->machine->some_ld_name)
      return cfun->machine->some_ld_name;
  
    for (insn = get_insns (); insn ; insn = NEXT_INSN (insn))
      if (INSN_P (insn)
  	&& for_each_rtx (&PATTERN (insn), get_some_local_dynamic_name_1, 0))
        return cfun->machine->some_ld_name;
  
    gcc_unreachable ();
  }
  
  static int
  get_some_local_dynamic_name_1 (rtx *px, void *data ATTRIBUTE_UNUSED)
  {
    rtx x = *px;
  
    if (x
        && GET_CODE (x) == SYMBOL_REF
        && SYMBOL_REF_TLS_MODEL (x) == TLS_MODEL_LOCAL_DYNAMIC)
      {
        cfun->machine->some_ld_name = XSTR (x, 0);
        return 1;
      }
  
    return 0;
  }
  
  /* This is called from dwarf2out.c via TARGET_ASM_OUTPUT_DWARF_DTPREL.
     We need to emit DTP-relative relocations.  */
  
  static void
  sparc_output_dwarf_dtprel (FILE *file, int size, rtx x)
  {
    switch (size)
      {
      case 4:
        fputs ("\t.word\t%r_tls_dtpoff32(", file);
        break;
      case 8:
        fputs ("\t.xword\t%r_tls_dtpoff64(", file);
        break;
      default:
        gcc_unreachable ();
      }
    output_addr_const (file, x);
    fputs (")", file);
  }
  
  /* Do whatever processing is required at the end of a file.  */
  
  static void
  sparc_file_end (void)
  {
    /* If we need to emit the special GOT helper function, do so now.  */
    if (got_helper_rtx)
      {
        const char *name = XSTR (got_helper_rtx, 0);
        const char *reg_name = reg_names[GLOBAL_OFFSET_TABLE_REGNUM];
  #ifdef DWARF2_UNWIND_INFO
        bool do_cfi;
  #endif
  
        if (USE_HIDDEN_LINKONCE)
  	{
  	  tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
  				  get_identifier (name),
  				  build_function_type_list (void_type_node,
                                                              NULL_TREE));
  	  DECL_RESULT (decl) = build_decl (BUILTINS_LOCATION, RESULT_DECL,
  					   NULL_TREE, void_type_node);
  	  TREE_PUBLIC (decl) = 1;
  	  TREE_STATIC (decl) = 1;
  	  make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
  	  DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
  	  DECL_VISIBILITY_SPECIFIED (decl) = 1;
  	  resolve_unique_section (decl, 0, flag_function_sections);
  	  allocate_struct_function (decl, true);
  	  cfun->is_thunk = 1;
  	  current_function_decl = decl;
  	  init_varasm_status ();
  	  assemble_start_function (decl, name);
  	}
        else
  	{
  	  const int align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT);
            switch_to_section (text_section);
  	  if (align > 0)
  	    ASM_OUTPUT_ALIGN (asm_out_file, align);
  	  ASM_OUTPUT_LABEL (asm_out_file, name);
  	}
  
  #ifdef DWARF2_UNWIND_INFO
        do_cfi = dwarf2out_do_cfi_asm ();
        if (do_cfi)
  	fprintf (asm_out_file, "\t.cfi_startproc\n");
  #endif
        if (flag_delayed_branch)
  	fprintf (asm_out_file, "\tjmp\t%%o7+8\n\t add\t%%o7, %s, %s\n",
  		 reg_name, reg_name);
        else
  	fprintf (asm_out_file, "\tadd\t%%o7, %s, %s\n\tjmp\t%%o7+8\n\t nop\n",
  		 reg_name, reg_name);
  #ifdef DWARF2_UNWIND_INFO
        if (do_cfi)
  	fprintf (asm_out_file, "\t.cfi_endproc\n");
  #endif
      }
  
    if (NEED_INDICATE_EXEC_STACK)
      file_end_indicate_exec_stack ();
  
  #ifdef TARGET_SOLARIS
    solaris_file_end ();
  #endif
  }
  
  #ifdef TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
  /* Implement TARGET_MANGLE_TYPE.  */
  
  static const char *
  sparc_mangle_type (const_tree type)
  {
    if (!TARGET_64BIT
        && TYPE_MAIN_VARIANT (type) == long_double_type_node
        && TARGET_LONG_DOUBLE_128)
      return "g";
  
    /* For all other types, use normal C++ mangling.  */
    return NULL;
  }
  #endif
  
  /* Expand a membar instruction for various use cases.  Both the LOAD_STORE
     and BEFORE_AFTER arguments of the form X_Y.  They are two-bit masks where
     bit 0 indicates that X is true, and bit 1 indicates Y is true.  */
  
  void
  sparc_emit_membar_for_model (enum memmodel model,
  			     int load_store, int before_after)
  {
    /* Bits for the MEMBAR mmask field.  */
    const int LoadLoad = 1;
    const int StoreLoad = 2;
    const int LoadStore = 4;
    const int StoreStore = 8;
  
    int mm = 0, implied = 0;
  
    switch (sparc_memory_model)
      {
      case SMM_SC:
        /* Sequential Consistency.  All memory transactions are immediately
  	 visible in sequential execution order.  No barriers needed.  */
        implied = LoadLoad | StoreLoad | LoadStore | StoreStore;
        break;
  
      case SMM_TSO:
        /* Total Store Ordering: all memory transactions with store semantics
  	 are followed by an implied StoreStore.  */
        implied |= StoreStore;
        /* FALLTHRU */
  
      case SMM_PSO:
        /* Partial Store Ordering: all memory transactions with load semantics
  	 are followed by an implied LoadLoad | LoadStore.  */
        implied |= LoadLoad | LoadStore;
  
        /* If we're not looking for a raw barrer (before+after), then atomic
  	 operations get the benefit of being both load and store.  */
        if (load_store == 3 && before_after == 2)
  	implied |= StoreLoad | StoreStore;
        /* FALLTHRU */
  
      case SMM_RMO:
        /* Relaxed Memory Ordering: no implicit bits.  */
        break;
  
      default:
        gcc_unreachable ();
      }
  
    if (before_after & 1)
      {
        if (model == MEMMODEL_ACQUIRE
            || model == MEMMODEL_ACQ_REL
            || model == MEMMODEL_SEQ_CST)
  	{
  	  if (load_store & 1)
  	    mm |= LoadLoad | LoadStore;
  	  if (load_store & 2)
  	    mm |= StoreLoad | StoreStore;
  	}
      }
    if (before_after & 2)
      {
        if (model == MEMMODEL_RELEASE
  	  || model == MEMMODEL_ACQ_REL
  	  || model == MEMMODEL_SEQ_CST)
  	{
  	  if (load_store & 1)
  	    mm |= LoadLoad | StoreLoad;
  	  if (load_store & 2)
  	    mm |= LoadStore | StoreStore;
  	}
      }
  
    /* Remove the bits implied by the system memory model.  */
    mm &= ~implied;
  
    /* For raw barriers (before+after), always emit a barrier.
       This will become a compile-time barrier if needed.  */
    if (mm || before_after == 3)
      emit_insn (gen_membar (GEN_INT (mm)));
  }
  
  /* Expand code to perform a 8 or 16-bit compare and swap by doing 32-bit
     compare and swap on the word containing the byte or half-word.  */
  
  static void
  sparc_expand_compare_and_swap_12 (rtx bool_result, rtx result, rtx mem,
  				  rtx oldval, rtx newval)
  {
    rtx addr1 = force_reg (Pmode, XEXP (mem, 0));
    rtx addr = gen_reg_rtx (Pmode);
    rtx off = gen_reg_rtx (SImode);
    rtx oldv = gen_reg_rtx (SImode);
    rtx newv = gen_reg_rtx (SImode);
    rtx oldvalue = gen_reg_rtx (SImode);
    rtx newvalue = gen_reg_rtx (SImode);
    rtx res = gen_reg_rtx (SImode);
    rtx resv = gen_reg_rtx (SImode);
    rtx memsi = { 0 };
    rtx val = { 0 };
    rtx mask = { 0 };
    rtx end_label = { 0 };
    rtx loop_label = { 0 };
    rtx cc = { 0 };
  
    emit_insn (gen_rtx_SET (VOIDmode, addr,
  			  gen_rtx_AND (Pmode, addr1, GEN_INT (-4))));
  
    if (Pmode != SImode)
      addr1 = gen_lowpart (SImode, addr1);
    emit_insn (gen_rtx_SET (VOIDmode, off,
  			  gen_rtx_AND (SImode, addr1, GEN_INT (3))));
  
    memsi = gen_rtx_MEM (SImode, addr);
    set_mem_alias_set (memsi, ALIAS_SET_MEMORY_BARRIER);
    MEM_VOLATILE_P (memsi) = MEM_VOLATILE_P (mem);
  
    val = copy_to_reg (memsi);
  
    emit_insn (gen_rtx_SET (VOIDmode, off,
  			  gen_rtx_XOR (SImode, off,
  				       GEN_INT (GET_MODE (mem) == QImode
  						? 3 : 2))));
  
    emit_insn (gen_rtx_SET (VOIDmode, off,
  			  gen_rtx_ASHIFT (SImode, off, GEN_INT (3))));
  
    if (GET_MODE (mem) == QImode)
      mask = force_reg (SImode, GEN_INT (0xff));
    else
      mask = force_reg (SImode, GEN_INT (0xffff));
  
    emit_insn (gen_rtx_SET (VOIDmode, mask,
  			  gen_rtx_ASHIFT (SImode, mask, off)));
  
    emit_insn (gen_rtx_SET (VOIDmode, val,
  			  gen_rtx_AND (SImode, gen_rtx_NOT (SImode, mask),
  				       val)));
  
    oldval = gen_lowpart (SImode, oldval);
    emit_insn (gen_rtx_SET (VOIDmode, oldv,
  			  gen_rtx_ASHIFT (SImode, oldval, off)));
  
    newval = gen_lowpart_common (SImode, newval);
    emit_insn (gen_rtx_SET (VOIDmode, newv,
  			  gen_rtx_ASHIFT (SImode, newval, off)));
  
    emit_insn (gen_rtx_SET (VOIDmode, oldv,
  			  gen_rtx_AND (SImode, oldv, mask)));
  
    emit_insn (gen_rtx_SET (VOIDmode, newv,
  			  gen_rtx_AND (SImode, newv, mask)));
  
    end_label = gen_label_rtx ();
    loop_label = gen_label_rtx ();
    emit_label (loop_label);
  
    emit_insn (gen_rtx_SET (VOIDmode, oldvalue,
  			  gen_rtx_IOR (SImode, oldv, val)));
  
    emit_insn (gen_rtx_SET (VOIDmode, newvalue,
  			  gen_rtx_IOR (SImode, newv, val)));
  
    emit_move_insn (bool_result, const1_rtx);
  
    emit_insn (gen_atomic_compare_and_swapsi_1 (res, memsi, oldvalue, newvalue));
  
    emit_cmp_and_jump_insns (res, oldvalue, EQ, NULL, SImode, 0, end_label);
  
    emit_insn (gen_rtx_SET (VOIDmode, resv,
  			  gen_rtx_AND (SImode, gen_rtx_NOT (SImode, mask),
  				       res)));
  
    emit_move_insn (bool_result, const0_rtx);
  
    cc = gen_compare_reg_1 (NE, resv, val);
    emit_insn (gen_rtx_SET (VOIDmode, val, resv));
  
    /* Use cbranchcc4 to separate the compare and branch!  */
    emit_jump_insn (gen_cbranchcc4 (gen_rtx_NE (VOIDmode, cc, const0_rtx),
  				  cc, const0_rtx, loop_label));
  
    emit_label (end_label);
  
    emit_insn (gen_rtx_SET (VOIDmode, res,
  			  gen_rtx_AND (SImode, res, mask)));
  
    emit_insn (gen_rtx_SET (VOIDmode, res,
  			  gen_rtx_LSHIFTRT (SImode, res, off)));
  
    emit_move_insn (result, gen_lowpart (GET_MODE (result), res));
  }
  
  /* Expand code to perform a compare-and-swap.  */
  
  void
  sparc_expand_compare_and_swap (rtx operands[])
  {
    rtx bval = { 0 };
    rtx retval = { 0 };
    rtx mem = { 0 };
    rtx oldval = { 0 };
    rtx newval = { 0 };
    enum machine_mode mode = (enum machine_mode)0;
    enum memmodel model = (enum memmodel)0;
  
    bval = operands[0];
    retval = operands[1];
    mem = operands[2];
    oldval = operands[3];
    newval = operands[4];
    model = (enum memmodel) INTVAL (operands[6]);
    mode = GET_MODE (mem);
  
    sparc_emit_membar_for_model (model, 3, 1);
  
    if (reg_overlap_mentioned_p (retval, oldval))
      oldval = copy_to_reg (oldval);
  
    if (mode == QImode || mode == HImode)
      sparc_expand_compare_and_swap_12 (bval, retval, mem, oldval, newval);
    else
      {
        rtx (*gen) (rtx, rtx, rtx, rtx);
        rtx x;
  
        if (mode == SImode)
  	gen = gen_atomic_compare_and_swapsi_1;
        else
  	gen = gen_atomic_compare_and_swapdi_1;
        emit_insn (gen (retval, mem, oldval, newval));
  
        x = emit_store_flag (bval, EQ, retval, oldval, mode, 1, 1);
        if (x != bval)
  	convert_move (bval, x, 1);
      }
  
    sparc_emit_membar_for_model (model, 3, 2);
  }
  
  void
  sparc_expand_vec_perm_bmask (enum machine_mode vmode, rtx sel)
  {
    rtx t_1 = { 0 };
    rtx t_2 = { 0 };
    rtx t_3 = { 0 };
  
    sel = gen_lowpart (DImode, sel);
    switch (vmode)
      {
      case V2SImode:
        /* inp = xxxxxxxAxxxxxxxB */
        t_1 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (16),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* t_1 = ....xxxxxxxAxxx. */
        sel = expand_simple_binop (SImode, AND, gen_lowpart (SImode, sel),
  				 GEN_INT (3), NULL_RTX, 1, OPTAB_DIRECT);
        t_1 = expand_simple_binop (SImode, AND, gen_lowpart (SImode, t_1),
  				 GEN_INT (0x30000), NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = .......B */
        /* t_1 = ...A.... */
        sel = expand_simple_binop (SImode, IOR, sel, t_1, sel, 1, OPTAB_DIRECT);
        /* sel = ...A...B */
        sel = expand_mult (SImode, sel, GEN_INT (0x4444), sel, 1);
        /* sel = AAAABBBB * 4 */
        t_1 = force_reg (SImode, GEN_INT (0x01230123));
        /* sel = { A*4, A*4+1, A*4+2, ... } */
        break;
  
      case V4HImode:
        /* inp = xxxAxxxBxxxCxxxD */
        t_1 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (8),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        t_2 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (16),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        t_3 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (24),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* t_1 = ..xxxAxxxBxxxCxx */
        /* t_2 = ....xxxAxxxBxxxC */
        /* t_3 = ......xxxAxxxBxx */
        sel = expand_simple_binop (SImode, AND, gen_lowpart (SImode, sel),
  				 GEN_INT (0x07),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        t_1 = expand_simple_binop (SImode, AND, gen_lowpart (SImode, t_1),
  				 GEN_INT (0x0700),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        t_2 = expand_simple_binop (SImode, AND, gen_lowpart (SImode, t_2),
  				 GEN_INT (0x070000),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        t_3 = expand_simple_binop (SImode, AND, gen_lowpart (SImode, t_3),
  				 GEN_INT (0x07000000),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = .......D */
        /* t_1 = .....C.. */
        /* t_2 = ...B.... */
        /* t_3 = .A...... */
        sel = expand_simple_binop (SImode, IOR, sel, t_1, sel, 1, OPTAB_DIRECT);
        t_2 = expand_simple_binop (SImode, IOR, t_2, t_3, t_2, 1, OPTAB_DIRECT);
        sel = expand_simple_binop (SImode, IOR, sel, t_2, sel, 1, OPTAB_DIRECT);
        /* sel = .A.B.C.D */
        sel = expand_mult (SImode, sel, GEN_INT (0x22), sel, 1);
        /* sel = AABBCCDD * 2 */
        t_1 = force_reg (SImode, GEN_INT (0x01010101));
        /* sel = { A*2, A*2+1, B*2, B*2+1, ... } */
        break;
    
      case V8QImode:
        /* input = xAxBxCxDxExFxGxH */
        sel = expand_simple_binop (DImode, AND, sel,
  				 GEN_INT ((HOST_WIDE_INT)0x0f0f0f0f << 32
  					  | 0x0f0f0f0f),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = .A.B.C.D.E.F.G.H */
        t_1 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (4),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* t_1 = ..A.B.C.D.E.F.G. */
        sel = expand_simple_binop (DImode, IOR, sel, t_1,
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = .AABBCCDDEEFFGGH */
        sel = expand_simple_binop (DImode, AND, sel,
  				 GEN_INT ((HOST_WIDE_INT)0xff00ff << 32
  					  | 0xff00ff),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = ..AB..CD..EF..GH */
        t_1 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (8),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* t_1 = ....AB..CD..EF.. */
        sel = expand_simple_binop (DImode, IOR, sel, t_1,
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = ..ABABCDCDEFEFGH */
        sel = expand_simple_binop (DImode, AND, sel,
  				 GEN_INT ((HOST_WIDE_INT)0xffff << 32 | 0xffff),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* sel = ....ABCD....EFGH */
        t_1 = expand_simple_binop (DImode, LSHIFTRT, sel, GEN_INT (16),
  				 NULL_RTX, 1, OPTAB_DIRECT);
        /* t_1 = ........ABCD.... */
        sel = gen_lowpart (SImode, sel);
        t_1 = gen_lowpart (SImode, t_1);
        break;
  
      default:
        gcc_unreachable ();
      }
  
    /* Always perform the final addition/merge within the bmask insn.  */
    emit_insn (gen_bmasksi_vis (gen_reg_rtx (SImode), sel, t_1));
  }
  
  /* Implement TARGET_FRAME_POINTER_REQUIRED.  */
  
  static bool
  sparc_frame_pointer_required (void)
  {
    /* If the stack pointer is dynamically modified in the function, it cannot
       serve as the frame pointer.  */
    if (cfun->calls_alloca)
      return true;
  
    /* If the function receives nonlocal gotos, it needs to save the frame
       pointer in the nonlocal_goto_save_area object.  */
    if (cfun->has_nonlocal_label)
      return true;
  
    /* In flat mode, that's it.  */
    if (TARGET_FLAT)
      return false;
  
    /* Otherwise, the frame pointer is required if the function isn't leaf.  */
    return !(current_function_is_leaf && only_leaf_regs_used ());
  }
  
  /* The way this is structured, we can't eliminate SFP in favor of SP
     if the frame pointer is required: we want to use the SFP->HFP elimination
     in that case.  But the test in update_eliminables doesn't know we are
     assuming below that we only do the former elimination.  */
  
  static bool
  sparc_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to)
  {
    return to == HARD_FRAME_POINTER_REGNUM || !sparc_frame_pointer_required ();
  }
  
  /* Return the hard frame pointer directly to bypass the stack bias.  */
  
  static rtx
  sparc_builtin_setjmp_frame_value (void)
  {
    return hard_frame_pointer_rtx;
  }
  
  /* If !TARGET_FPU, then make the fp registers and fp cc regs fixed so that
     they won't be allocated.  */
  
  static void
  sparc_conditional_register_usage (void)
  {
    if (PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM)
      {
        fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;
        call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;
      }
    /* If the user has passed -f{fixed,call-{used,saved}}-g5 */
    /* then honor it.  */
    if (TARGET_ARCH32 && fixed_regs[5])
      fixed_regs[5] = 1;
    else if (TARGET_ARCH64 && fixed_regs[5] == 2)
      fixed_regs[5] = 0;
    if (! TARGET_V9)
      {
        int regno;
        for (regno = SPARC_FIRST_V9_FP_REG;
  	   regno <= SPARC_LAST_V9_FP_REG;
  	   regno++)
  	fixed_regs[regno] = 1;
        /* %fcc0 is used by v8 and v9.  */
        for (regno = SPARC_FIRST_V9_FCC_REG + 1;
  	   regno <= SPARC_LAST_V9_FCC_REG;
  	   regno++)
  	fixed_regs[regno] = 1;
      }
    if (! TARGET_FPU)
      {
        int regno;
        for (regno = 32; regno < SPARC_LAST_V9_FCC_REG; regno++)
  	fixed_regs[regno] = 1;
      }
    /* If the user has passed -f{fixed,call-{used,saved}}-g2 */
    /* then honor it.  Likewise with g3 and g4.  */
    if (fixed_regs[2] == 2)
      fixed_regs[2] = ! TARGET_APP_REGS;
    if (fixed_regs[3] == 2)
      fixed_regs[3] = ! TARGET_APP_REGS;
    if (TARGET_ARCH32 && fixed_regs[4] == 2)
      fixed_regs[4] = ! TARGET_APP_REGS;
    else if (TARGET_CM_EMBMEDANY)
      fixed_regs[4] = 1;
    else if (fixed_regs[4] == 2)
      fixed_regs[4] = 0;
    if (TARGET_FLAT)
      {
        int regno;
        /* Disable leaf functions.  */
        memset (sparc_leaf_regs, 0, FIRST_PSEUDO_REGISTER);
        for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
  	leaf_reg_remap [regno] = regno;
      }
    if (TARGET_VIS)
      global_regs[SPARC_GSR_REG] = 1;
  }
  
  /* Implement TARGET_PREFERRED_RELOAD_CLASS:
  
     - We can't load constants into FP registers.
     - We can't load FP constants into integer registers when soft-float,
       because there is no soft-float pattern with a r/F constraint.
     - We can't load FP constants into integer registers for TFmode unless
       it is 0.0L, because there is no movtf pattern with a r/F constraint.
     - Try and reload integer constants (symbolic or otherwise) back into
       registers directly, rather than having them dumped to memory.  */
  
  static reg_class_t
  sparc_preferred_reload_class (rtx x, reg_class_t rclass)
  {
    enum machine_mode mode = GET_MODE (x);
    if (CONSTANT_P (x))
      {
        if (FP_REG_CLASS_P (rclass)
  	  || rclass == GENERAL_OR_FP_REGS
  	  || rclass == GENERAL_OR_EXTRA_FP_REGS
  	  || (GET_MODE_CLASS (mode) == MODE_FLOAT && ! TARGET_FPU)
  	  || (mode == TFmode && ! const_zero_operand (x, mode)))
  	return NO_REGS;
  
        if (GET_MODE_CLASS (mode) == MODE_INT)
  	return GENERAL_REGS;
  
        if (GET_MODE_CLASS (mode) == MODE_VECTOR_INT)
  	{
  	  if (! FP_REG_CLASS_P (rclass)
  	      || !(const_zero_operand (x, mode)
  		   || const_all_ones_operand (x, mode)))
  	    return NO_REGS;
  	}
      }
  
    if (TARGET_VIS3
        && ! TARGET_ARCH64
        && (rclass == EXTRA_FP_REGS
  	  || rclass == GENERAL_OR_EXTRA_FP_REGS))
      {
        int regno = true_regnum (x);
  
        if (SPARC_INT_REG_P (regno))
  	return (rclass == EXTRA_FP_REGS
  		? FP_REGS : GENERAL_OR_FP_REGS);
      }
  
    return rclass;
  }
  
  /* Output a wide multiply instruction in V8+ mode.  INSN is the instruction,
     OPERANDS are its operands and OPCODE is the mnemonic to be used.  */
  
  const char *
  output_v8plus_mult (rtx insn, rtx *operands, const char *opcode)
  {
    char mulstr[32] = { 0 };
  
    gcc_assert (! TARGET_ARCH64);
  
    if (sparc_check_64 (operands[1], insn) <= 0)
      output_asm_insn ("srl\t%L1, 0, %L1", operands);
    if (which_alternative == 1)
      output_asm_insn ("sllx\t%H1, 32, %H1", operands);
    if (GET_CODE (operands[2]) == CONST_INT)
      {
        if (which_alternative == 1)
  	{
  	  output_asm_insn ("or\t%L1, %H1, %H1", operands);
  	  sprintf (mulstr, "%s\t%%H1, %%2, %%L0", opcode);
  	  output_asm_insn (mulstr, operands);
  	  return "srlx\t%L0, 32, %H0";
  	}
        else
  	{
  	  output_asm_insn ("sllx\t%H1, 32, %3", operands);
            output_asm_insn ("or\t%L1, %3, %3", operands);
            sprintf (mulstr, "%s\t%%3, %%2, %%3", opcode);
  	  output_asm_insn (mulstr, operands);
  	  output_asm_insn ("srlx\t%3, 32, %H0", operands);
            return "mov\t%3, %L0";
  	}
      }
    else if (rtx_equal_p (operands[1], operands[2]))
      {
        if (which_alternative == 1)
  	{
  	  output_asm_insn ("or\t%L1, %H1, %H1", operands);
            sprintf (mulstr, "%s\t%%H1, %%H1, %%L0", opcode);
  	  output_asm_insn (mulstr, operands);
  	  return "srlx\t%L0, 32, %H0";
  	}
        else
  	{
  	  output_asm_insn ("sllx\t%H1, 32, %3", operands);
            output_asm_insn ("or\t%L1, %3, %3", operands);
  	  sprintf (mulstr, "%s\t%%3, %%3, %%3", opcode);
  	  output_asm_insn (mulstr, operands);
  	  output_asm_insn ("srlx\t%3, 32, %H0", operands);
            return "mov\t%3, %L0";
  	}
      }
    if (sparc_check_64 (operands[2], insn) <= 0)
      output_asm_insn ("srl\t%L2, 0, %L2", operands);
    if (which_alternative == 1)
      {
        output_asm_insn ("or\t%L1, %H1, %H1", operands);
        output_asm_insn ("sllx\t%H2, 32, %L1", operands);
        output_asm_insn ("or\t%L2, %L1, %L1", operands);
        sprintf (mulstr, "%s\t%%H1, %%L1, %%L0", opcode);
        output_asm_insn (mulstr, operands);
        return "srlx\t%L0, 32, %H0";
      }
    else
      {
        output_asm_insn ("sllx\t%H1, 32, %3", operands);
        output_asm_insn ("sllx\t%H2, 32, %4", operands);
        output_asm_insn ("or\t%L1, %3, %3", operands);
        output_asm_insn ("or\t%L2, %4, %4", operands);
        sprintf (mulstr, "%s\t%%3, %%4, %%3", opcode);
        output_asm_insn (mulstr, operands);
        output_asm_insn ("srlx\t%3, 32, %H0", operands);
        return "mov\t%3, %L0";
      }
  }
  
  /* Subroutine of sparc_expand_vector_init.  Emit code to initialize
     all fields of TARGET to ELT by means of VIS2 BSHUFFLE insn.  MODE
     and INNER_MODE are the modes describing TARGET.  */
  
  static void
  vector_init_bshuffle (rtx target, rtx elt, enum machine_mode mode,
  		      enum machine_mode inner_mode)
  {
    rtx t1 = { 0 };
    rtx final_insn = { 0 };
    int bmask = { 0 };
  
    t1 = gen_reg_rtx (mode);
  
    elt = convert_modes (SImode, inner_mode, elt, true);
    emit_move_insn (gen_lowpart(SImode, t1), elt);
  
    switch (mode)
      {
      case V2SImode:
        final_insn = gen_bshufflev2si_vis (target, t1, t1);
        bmask = 0x45674567;
        break;
      case V4HImode:
        final_insn = gen_bshufflev4hi_vis (target, t1, t1);
        bmask = 0x67676767;
        break;
      case V8QImode:
        final_insn = gen_bshufflev8qi_vis (target, t1, t1);
        bmask = 0x77777777;
        break;
      default:
        gcc_unreachable ();
      }
  
    emit_insn (gen_bmasksi_vis (gen_reg_rtx (SImode), CONST0_RTX (SImode),
  			      force_reg (SImode, GEN_INT (bmask))));
    emit_insn (final_insn);
  }
  
  /* Subroutine of sparc_expand_vector_init.  Emit code to initialize
     all fields of TARGET to ELT in V8QI by means of VIS FPMERGE insn.  */
  
  static void
  vector_init_fpmerge (rtx target, rtx elt)
  {
    rtx t1 = { 0 };
    rtx t2 = { 0 };
    rtx t2_low = { 0 };
    rtx t3 = { 0 };
    rtx t3_low = { 0 };
  
    t1 = gen_reg_rtx (V4QImode);
    elt = convert_modes (SImode, QImode, elt, true);
    emit_move_insn (gen_lowpart (SImode, t1), elt);
  
    t2 = gen_reg_rtx (V8QImode);
    t2_low = gen_lowpart (V4QImode, t2);
    emit_insn (gen_fpmerge_vis (t2, t1, t1));
  
    t3 = gen_reg_rtx (V8QImode);
    t3_low = gen_lowpart (V4QImode, t3);
    emit_insn (gen_fpmerge_vis (t3, t2_low, t2_low));
  
    emit_insn (gen_fpmerge_vis (target, t3_low, t3_low));
  }
  
  /* Subroutine of sparc_expand_vector_init.  Emit code to initialize
     all fields of TARGET to ELT in V4HI by means of VIS FALIGNDATA insn.  */
  
  static void
  vector_init_faligndata (rtx target, rtx elt)
  {
    rtx t1 = gen_reg_rtx (V4HImode);
    int i = { 0 };
  
    elt = convert_modes (SImode, HImode, elt, true);
    emit_move_insn (gen_lowpart (SImode, t1), elt);
  
    emit_insn (gen_alignaddrsi_vis (gen_reg_rtx (SImode),
  				  force_reg (SImode, GEN_INT (6)),
  				  const0_rtx));
  
    for (i = 0; i < 4; i++)
      emit_insn (gen_faligndatav4hi_vis (target, t1, target));
  }
  
  /* Emit code to initialize TARGET to values for individual fields VALS.  */
  
  void
  sparc_expand_vector_init (rtx target, rtx vals)
  {
    const enum machine_mode mode = GET_MODE (target);
    const enum machine_mode inner_mode = GET_MODE_INNER (mode);
    const int n_elts = GET_MODE_NUNITS (mode);
    int i = { 0 };
    int n_var = { 0 };
    bool all_same = { 0 };
    rtx mem = { 0 };
  
    all_same = true;
    for (i = 0; i < n_elts; i++)
      {
        rtx x = XVECEXP (vals, 0, i);
        if (!CONSTANT_P (x))
  	n_var++;
  
        if (i > 0 && !rtx_equal_p (x, XVECEXP (vals, 0, 0)))
  	all_same = false;
      }
  
    if (n_var == 0)
      {
        emit_move_insn (target, gen_rtx_CONST_VECTOR (mode, XVEC (vals, 0)));
        return;
      }
  
    if (GET_MODE_SIZE (inner_mode) == GET_MODE_SIZE (mode))
      {
        if (GET_MODE_SIZE (inner_mode) == 4)
  	{
  	  emit_move_insn (gen_lowpart (SImode, target),
  			  gen_lowpart (SImode, XVECEXP (vals, 0, 0)));
  	  return;
  	}
        else if (GET_MODE_SIZE (inner_mode) == 8)
  	{
  	  emit_move_insn (gen_lowpart (DImode, target),
  			  gen_lowpart (DImode, XVECEXP (vals, 0, 0)));
  	  return;
  	}
      }
    else if (GET_MODE_SIZE (inner_mode) == GET_MODE_SIZE (word_mode)
  	   && GET_MODE_SIZE (mode) == 2 * GET_MODE_SIZE (word_mode))
      {
        emit_move_insn (gen_highpart (word_mode, target),
  		      gen_lowpart (word_mode, XVECEXP (vals, 0, 0)));
        emit_move_insn (gen_lowpart (word_mode, target),
  		      gen_lowpart (word_mode, XVECEXP (vals, 0, 1)));
        return;
      }
  
    if (all_same && GET_MODE_SIZE (mode) == 8)
      {
        if (TARGET_VIS2)
  	{
  	  vector_init_bshuffle (target, XVECEXP (vals, 0, 0), mode, inner_mode);
  	  return;
  	}
        if (mode == V8QImode)
  	{
  	  vector_init_fpmerge (target, XVECEXP (vals, 0, 0));
  	  return;
  	}
        if (mode == V4HImode)
  	{
  	  vector_init_faligndata (target, XVECEXP (vals, 0, 0));
  	  return;
  	}
      }
  
    mem = assign_stack_temp (mode, GET_MODE_SIZE (mode), 0);
    for (i = 0; i < n_elts; i++)
      emit_move_insn (adjust_address_nv (mem, inner_mode,
  				       i * GET_MODE_SIZE (inner_mode)),
  		    XVECEXP (vals, 0, i));
    emit_move_insn (target, mem);
  }
  
  /* Implement TARGET_SECONDARY_RELOAD.  */
  
  static reg_class_t
  sparc_secondary_reload (bool in_p, rtx x, reg_class_t rclass_i,
  			enum machine_mode mode, secondary_reload_info *sri)
  {
    enum reg_class rclass = (enum reg_class) rclass_i;
  
    sri->icode = CODE_FOR_nothing;
    sri->extra_cost = 0;
  
    /* We need a temporary when loading/storing a HImode/QImode value
       between memory and the FPU registers.  This can happen when combine puts
       a paradoxical subreg in a float/fix conversion insn.  */
    if (FP_REG_CLASS_P (rclass)
        && (mode == HImode || mode == QImode)
        && (GET_CODE (x) == MEM
  	  || ((GET_CODE (x) == REG || GET_CODE (x) == SUBREG)
  	      && true_regnum (x) == -1)))
      return GENERAL_REGS;
  
    /* On 32-bit we need a temporary when loading/storing a DFmode value
       between unaligned memory and the upper FPU registers.  */
    if (TARGET_ARCH32
        && rclass == EXTRA_FP_REGS
        && mode == DFmode
        && GET_CODE (x) == MEM
        && ! mem_min_alignment (x, 8))
      return FP_REGS;
  
    if (((TARGET_CM_MEDANY
  	&& symbolic_operand (x, mode))
         || (TARGET_CM_EMBMEDANY
  	   && text_segment_operand (x, mode)))
        && ! flag_pic)
      {
        if (in_p)
  	sri->icode = direct_optab_handler (reload_in_optab, mode);
        else
  	sri->icode = direct_optab_handler (reload_out_optab, mode);
        return NO_REGS;
      }
  
    if (TARGET_VIS3 && TARGET_ARCH32)
      {
        int regno = true_regnum (x);
  
        /* When using VIS3 fp<-->int register moves, on 32-bit we have
  	 to move 8-byte values in 4-byte pieces.  This only works via
  	 FP_REGS, and not via EXTRA_FP_REGS.  Therefore if we try to
  	 move between EXTRA_FP_REGS and GENERAL_REGS, we will need
  	 an FP_REGS intermediate move.  */
        if ((rclass == EXTRA_FP_REGS && SPARC_INT_REG_P (regno))
  	  || ((general_or_i64_p (rclass)
  	       || rclass == GENERAL_OR_FP_REGS)
  	      && SPARC_FP_REG_P (regno)))
  	{
  	  sri->extra_cost = 2;
  	  return FP_REGS;
  	}
      }
  
    return NO_REGS;
  }
  
  /* Emit code to conditionally move either OPERANDS[2] or OPERANDS[3] into
     OPERANDS[0] in MODE.  OPERANDS[1] is the operator of the condition.  */
  
  bool
  sparc_expand_conditional_move (enum machine_mode mode, rtx *operands)
  {
    enum rtx_code rc = GET_CODE (operands[1]);
    enum machine_mode cmp_mode = (enum machine_mode)0;
    rtx cc_reg = { 0 };
    rtx dst = { 0 };
    rtx cmp = { 0 };
  
    cmp = operands[1];
    if (GET_MODE (XEXP (cmp, 0)) == DImode && !TARGET_ARCH64)
      return false;
  
    if (GET_MODE (XEXP (cmp, 0)) == TFmode && !TARGET_HARD_QUAD)
      cmp = sparc_emit_float_lib_cmp (XEXP (cmp, 0), XEXP (cmp, 1), rc);
  
    cmp_mode = GET_MODE (XEXP (cmp, 0));
    rc = GET_CODE (cmp);
  
    dst = operands[0];
    if (! rtx_equal_p (operands[2], dst)
        && ! rtx_equal_p (operands[3], dst))
      {
        if (reg_overlap_mentioned_p (dst, cmp))
  	dst = gen_reg_rtx (mode);
  
        emit_move_insn (dst, operands[3]);
      }
    else if (operands[2] == dst)
      {
        operands[2] = operands[3];
  
        if (GET_MODE_CLASS (cmp_mode) == MODE_FLOAT)
          rc = reverse_condition_maybe_unordered (rc);
        else
          rc = reverse_condition (rc);
      }
  
    if (XEXP (cmp, 1) == const0_rtx
        && GET_CODE (XEXP (cmp, 0)) == REG
        && cmp_mode == DImode
        && v9_regcmp_p (rc))
      cc_reg = XEXP (cmp, 0);
    else
      cc_reg = gen_compare_reg_1 (rc, XEXP (cmp, 0), XEXP (cmp, 1));
  
    cmp = gen_rtx_fmt_ee (rc, GET_MODE (cc_reg), cc_reg, const0_rtx);
  
    emit_insn (gen_rtx_SET (VOIDmode, dst,
  			  gen_rtx_IF_THEN_ELSE (mode, cmp, operands[2], dst)));
  
    if (dst != operands[0])
      emit_move_insn (operands[0], dst);
  
    return true;
  }
  
  /* Emit code to conditionally move a combination of OPERANDS[1] and OPERANDS[2]
     into OPERANDS[0] in MODE, depending on the outcome of the comparison of
     OPERANDS[4] and OPERANDS[5].  OPERANDS[3] is the operator of the condition.
     FCODE is the machine code to be used for OPERANDS[3] and CCODE the machine
     code to be used for the condition mask.  */
  
  void
  sparc_expand_vcond (enum machine_mode mode, rtx *operands, int ccode, int fcode)
  {
    rtx mask = { 0 };
    rtx cop0 = { 0 };
    rtx cop1 = { 0 };
    rtx fcmp = { 0 };
    rtx cmask = { 0 };
    rtx bshuf = { 0 };
    rtx gsr = { 0 };
    enum rtx_code code = GET_CODE (operands[3]);
  
    mask = gen_reg_rtx (Pmode);
    cop0 = operands[4];
    cop1 = operands[5];
    if (code == LT || code == GE)
      {
        rtx t = { 0 };
  
        code = swap_condition (code);
        t = cop0; cop0 = cop1; cop1 = t;
      }
  
    gsr = gen_rtx_REG (DImode, SPARC_GSR_REG);
  
    fcmp = gen_rtx_UNSPEC (Pmode,
  			 gen_rtvec (1, gen_rtx_fmt_ee (code, mode, cop0, cop1)),
  			 fcode);
  
    cmask = gen_rtx_UNSPEC (DImode,
  			  gen_rtvec (2, mask, gsr),
  			  ccode);
  
    bshuf = gen_rtx_UNSPEC (mode,
  			  gen_rtvec (3, operands[1], operands[2], gsr),
  			  UNSPEC_BSHUFFLE);
  
    emit_insn (gen_rtx_SET (VOIDmode, mask, fcmp));
    emit_insn (gen_rtx_SET (VOIDmode, gsr, cmask));
  
    emit_insn (gen_rtx_SET (VOIDmode, operands[0], bshuf));
  }
  
  /* On sparc, any mode which naturally allocates into the float
     registers should return 4 here.  */
  
  unsigned int
  sparc_regmode_natural_size (enum machine_mode mode)
  {
    int size = UNITS_PER_WORD;
  
    if (TARGET_ARCH64)
      {
        enum mode_class mclass = GET_MODE_CLASS (mode);
  
        if (mclass == MODE_FLOAT || mclass == MODE_VECTOR_INT)
  	size = 4;
      }
  
    return size;
  }
  
  /* Return TRUE if it is a good idea to tie two pseudo registers
     when one has mode MODE1 and one has mode MODE2.
     If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
     for any hard reg, then this must be FALSE for correct output.
  
     For V9 we have to deal with the fact that only the lower 32 floating
     point registers are 32-bit addressable.  */
  
  bool
  sparc_modes_tieable_p (enum machine_mode mode1, enum machine_mode mode2)
  {
    enum mode_class mclass1 = (enum mode_class)0;
    enum mode_class mclass2 = (enum mode_class)0;
    unsigned short size1 = { 0 };
    unsigned short size2 = { 0 };
  
    if (mode1 == mode2)
      return true;
  
    mclass1 = GET_MODE_CLASS (mode1);
    mclass2 = GET_MODE_CLASS (mode2);
    if (mclass1 != mclass2)
      return false;
  
    if (! TARGET_V9)
      return true;
  
    /* Classes are the same and we are V9 so we have to deal with upper
       vs. lower floating point registers.  If one of the modes is a
       4-byte mode, and the other is not, we have to mark them as not
       tieable because only the lower 32 floating point register are
       addressable 32-bits at a time.
  
       We can't just test explicitly for SFmode, otherwise we won't
       cover the vector mode cases properly.  */
  
    if (mclass1 != MODE_FLOAT && mclass1 != MODE_VECTOR_INT)
      return true;
  
    size1 = GET_MODE_SIZE (mode1);
    size2 = GET_MODE_SIZE (mode2);
    if ((size1 > 4 && size2 == 4)
        || (size2 > 4 && size1 == 4))
      return false;
  
    return true;
  }
  
  #include "gt-sparc.h"
  