text: /*
     +----------------------------------------------------------------------+
     | HipHop for PHP                                                       |
     +----------------------------------------------------------------------+
     | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
     +----------------------------------------------------------------------+
     | This source file is subject to version 3.01 of the PHP license,      |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.php.net/license/3_01.txt                                  |
     | If you did not receive a copy of the PHP license and are unable to   |
     | obtain it through the world-wide-web, please send a note to          |
     | license@php.net so we can mail you a copy immediately.               |
     +----------------------------------------------------------------------+
  */
  
  #ifndef incl_HPHP_JIT_SMASHABLE_INSTR_X64_H_
  #define incl_HPHP_JIT_SMASHABLE_INSTR_X64_H_
  
  #include "hphp/runtime/vm/jit/types.h"
  #include "hphp/runtime/vm/jit/phys-reg.h"
  
  #include "hphp/util/asm-x64.h"
  #include "hphp/util/data-block.h"
  
  namespace HPHP { namespace jit {
  
  struct CGMeta;
  
  namespace x64 {
  
  ///////////////////////////////////////////////////////////////////////////////
  
  /*
   * Mirrors the API of smashable-instr.h.
   */
  
  constexpr size_t smashableMovqLen() { return 10; }
  constexpr size_t smashableCmpqLen() { return 8; }
  constexpr size_t smashableCallLen() { return 5; }
  constexpr size_t smashableJmpLen()  { return 5; }
  constexpr size_t smashableJccLen()  { return 6; }
  
  TCA emitSmashableMovq(CodeBlock& cb, CGMeta& fixups, uint64_t imm,
                        PhysReg d);
  TCA emitSmashableCmpq(CodeBlock& cb, CGMeta& fixups, int32_t imm,
                        PhysReg r, int8_t disp);
  TCA emitSmashableCall(CodeBlock& cb, CGMeta& fixups, TCA target);
  TCA emitSmashableJmp(CodeBlock& cb, CGMeta& fixups, TCA target);
  TCA emitSmashableJcc(CodeBlock& cb, CGMeta& fixups, TCA target,
                       ConditionCode cc);
  void smashMovq(TCA inst, uint64_t imm);
  void smashCmpq(TCA inst, uint32_t imm);
  void smashCall(TCA inst, TCA target);
  void smashJmp(TCA inst, TCA target);
  void smashJcc(TCA inst, TCA target, ConditionCode cc = CC_None);
  
  uint64_t smashableMovqImm(TCA inst);
  uint32_t smashableCmpqImm(TCA inst);
  TCA smashableCallTarget(TCA inst);
  TCA smashableJmpTarget(TCA inst);
  TCA smashableJccTarget(TCA inst);
  ConditionCode smashableJccCond(TCA inst);
  
  /*
   * Smashable immediate and target offsets.
   *
   * These are also used by align-x64.
   */
  constexpr size_t kSmashMovqImmOff = 2;
  constexpr size_t kSmashCmpqImmOff = 4;
  
  ///////////////////////////////////////////////////////////////////////////////
  
  }}}
  
  #endif
  