text: /*
   * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code 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
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   *
   */
  
  #ifndef CPU_AARCH64_VM_C1_MACROASSEMBLER_AARCH64_HPP
  #define CPU_AARCH64_VM_C1_MACROASSEMBLER_AARCH64_HPP
  
  using MacroAssembler::build_frame;
  using MacroAssembler::null_check;
  
  // C1_MacroAssembler contains high-level macros for C1
  
   private:
    int _rsp_offset;    // track rsp changes
    // initialization
    void pd_init() { _rsp_offset = 0; }
  
  
   public:
    void try_allocate(
      Register obj,                      // result: pointer to object after successful allocation
      Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
      int      con_size_in_bytes,        // object size in bytes if   known at compile time
      Register t1,                       // temp register
      Register t2,                       // temp register
      Label&   slow_case                 // continuation point if fast allocation fails
    );
  
    void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
    void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);
  
    void float_cmp(bool is_float, int unordered_result,
                   FloatRegister f0, FloatRegister f1,
                   Register result);
  
    // locking
    // hdr     : must be r0, contents destroyed
    // obj     : must point to the object to lock, contents preserved
    // disp_hdr: must point to the displaced header location, contents preserved
    // scratch : scratch register, contents destroyed
    // returns code offset at which to add null check debug information
    int lock_object  (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
  
    // unlocking
    // hdr     : contents destroyed
    // obj     : must point to the object to lock, contents preserved
    // disp_hdr: must be r0 & must point to the displaced header location, contents destroyed
    void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
  
    void initialize_object(
      Register obj,                      // result: pointer to object after successful allocation
      Register klass,                    // object klass
      Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise
      int      con_size_in_bytes,        // object size in bytes if   known at compile time
      Register t1,                       // temp register
      Register t2,                        // temp register
      bool     is_tlab_allocated         // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB
    );
  
    // allocation of fixed-size objects
    // (can also be used to allocate fixed-size arrays, by setting
    // hdr_size correctly and storing the array length afterwards)
    // obj        : will contain pointer to allocated object
    // t1, t2     : scratch registers - contents destroyed
    // header_size: size of object header in words
    // object_size: total size of object in words
    // slow_case  : exit to slow case implementation if fast allocation fails
    void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
  
    enum {
      max_array_allocation_length = 0x00FFFFFF
    };
  
    // allocation of arrays
    // obj        : will contain pointer to allocated object
    // len        : array length in number of elements
    // t          : scratch register - contents destroyed
    // header_size: size of object header in words
    // f          : element scale factor
    // slow_case  : exit to slow case implementation if fast allocation fails
    void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, int f, Register klass, Label& slow_case);
  
    int  rsp_offset() const { return _rsp_offset; }
    void set_rsp_offset(int n) { _rsp_offset = n; }
  
    void invalidate_registers(bool inv_r0, bool inv_r19, bool inv_r2, bool inv_r3, bool inv_r4, bool inv_r5) PRODUCT_RETURN;
  
    // This platform only uses signal-based null checks. The Label is not needed.
    void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); }
  
    void load_parameter(int offset_in_words, Register reg);
  
  #endif // CPU_AARCH64_VM_C1_MACROASSEMBLER_AARCH64_HPP
  