text: /*
     +----------------------------------------------------------------------+
     | HipHop for PHP                                                       |
     +----------------------------------------------------------------------+
     | (c) Copyright IBM Corporation 2015-2016                              |
     +----------------------------------------------------------------------+
     | 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_PPC64_H_
  #define incl_HPHP_JIT_SMASHABLE_INSTR_PPC64_H_
  
  #include "hphp/runtime/vm/jit/types.h"
  #include "hphp/runtime/vm/jit/phys-reg.h"
  
  #include "hphp/ppc64-asm/asm-ppc64.h"
  #include "hphp/util/data-block.h"
  
  namespace HPHP { namespace jit {
  
  struct CGMeta;
  
  namespace ppc64 {
  
  ///////////////////////////////////////////////////////////////////////////////
  
  /*
   * Mirrors the API of smashable-instr.h.
   */
  
  constexpr uint8_t kStdIns = ppc64_asm::instr_size_in_bytes;
  
  // limmediate
  constexpr size_t smashableMovqLen() { return ppc64_asm::Assembler::kLimmLen; }
  
  // limmediate + lwz + extsw + cmpd
  constexpr size_t smashableCmpqLen() { return smashableMovqLen() + 3*kStdIns; }
  
  // The following instruction size is from the beginning of the smashableCall
  // to the address the LR saves upon branching with bctrl
  constexpr size_t smashableCallLen() { return ppc64_asm::Assembler::kCallLen; }
  constexpr size_t smashableJccLen()  { return ppc64_asm::Assembler::kJccLen; }
  
  // Same length as Jcc.
  constexpr size_t smashableJmpLen()  { return smashableJccLen(); }
  
  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,
                        ppc64_asm::Assembler::CallArg ca =
                          ppc64_asm::Assembler::CallArg::SmashInt);
  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);
  
  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);
  
  constexpr size_t kSmashMovqImmOff = 0;
  constexpr size_t kSmashCmpqImmOff = 0;
  
  ///////////////////////////////////////////////////////////////////////////////
  
  }}}
  
  #endif
  