text: /* Machine-dependent software floating-point definitions.
     Sparc64 userland (_Q_* and _Qp_*) version.
     Copyright (C) 1997, 1998, 1999, 2006 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Richard Henderson (rth@cygnus.com),
  		  Jakub Jelinek (jj@ultra.linux.cz) and
  		  David S. Miller (davem@redhat.com).
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library 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
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
     
  #include <fpu_control.h>
  #include <fenv.h>
  #include <stdlib.h>
  
  #define _FP_W_TYPE_SIZE		64
  #define _FP_W_TYPE		unsigned long
  #define _FP_WS_TYPE		signed long
  #define _FP_I_TYPE		long
  
  /* Helper macros for _FP_MUL_MEAT_2_120_240_double.  */
  #define _FP_MUL_MEAT_SET_FE_TZ		   			\
  do {								\
    static fpu_control_t _fetz = _FPU_RC_DOWN;			\
    _FPU_SETCW(_fetz);						\
  } while (0)
  #ifndef _FP_MUL_MEAT_RESET_FE
  #define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw)
  #endif
        
  #define _FP_MUL_MEAT_S(R,X,Y)					\
    _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
  #define _FP_MUL_MEAT_D(R,X,Y)					\
    _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  #define _FP_MUL_MEAT_Q(R,X,Y)					\
    _FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y,		\
  				_FP_MUL_MEAT_SET_FE_TZ,		\
  				_FP_MUL_MEAT_RESET_FE)
  
  #define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
  #define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
  #define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_2_udiv(Q,R,X,Y)
  
  #define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
  #define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1)
  #define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1
  #define _FP_NANSIGN_S		0
  #define _FP_NANSIGN_D		0
  #define _FP_NANSIGN_Q		0
  
  #define _FP_KEEPNANFRACP 1
  
  /* If one NaN is signaling and the other is not,
   * we choose that one, otherwise we choose Y.
   */
  #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
    do {								\
      if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)		\
  	&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))	\
        {								\
  	R##_s = X##_s;						\
  	_FP_FRAC_COPY_##wc(R,X);				\
        }								\
      else							\
        {								\
  	R##_s = Y##_s;						\
  	_FP_FRAC_COPY_##wc(R,Y);				\
        }								\
      R##_c = FP_CLS_NAN;						\
    } while (0)
  
  /* Obtain the current rounding mode. */
  #ifndef FP_ROUNDMODE
  #define FP_ROUNDMODE	((_fcw >> 30) & 0x3)
  #endif
  
  /* Exception flags. */
  #define FP_EX_INVALID		(1 << 4)
  #define FP_EX_OVERFLOW		(1 << 3)
  #define FP_EX_UNDERFLOW		(1 << 2)
  #define FP_EX_DIVZERO		(1 << 1)
  #define FP_EX_INEXACT		(1 << 0)
  
  #define _FP_DECL_EX	fpu_control_t _fcw
  
  #define FP_INIT_ROUNDMODE					\
  do {								\
    _FPU_GETCW(_fcw);						\
  } while (0)
  
  #define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex)
  
  /* Simulate exceptions using double arithmetics. */
  extern double __Qp_handle_exceptions(int exc);
  
  #define FP_HANDLE_EXCEPTIONS					\
  do {								\
    if (!_fex)							\
      {								\
        /* This is the common case, so we do it inline.		\
         * We need to clear cexc bits if any.			\
         */							\
        __asm__ __volatile__("\n"					\
  "      	fzero %%f62\n"						\
  "      	faddd %%f62, %%f62, %%f62\n"				\
  "      	" : : : "f62");						\
      }								\
    else								\
      {								\
        __Qp_handle_exceptions (_fex);				\
      }								\
  } while (0)
  
  #define QP_HANDLE_EXCEPTIONS(_a)				\
  do {								\
    if ((_fcw >> 23) & _fex)					\
      {								\
        _a;							\
      }								\
    else								\
      {								\
        _fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex;		\
        _FPU_SETCW(_fcw);						\
      }								\
  } while (0)
  
  #define QP_NO_EXCEPTIONS					\
    __asm ("fzero %%f62\n"					\
  "	  faddd %%f62, %%f62, %%f62" : : : "f62")
                                
  #define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62"
  #define QP_CLOBBER_CC QP_CLOBBER , "cc"
  