/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_x64_Lowering_x64_h
#define jit_x64_Lowering_x64_h

#include "jit/x86-shared/Lowering-x86-shared.h"

namespace js {
namespace jit {

class LIRGeneratorX64 : public LIRGeneratorX86Shared {
 public:
  LIRGeneratorX64(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph)
      : LIRGeneratorX86Shared(gen, graph, lirGraph) {}

 protected:
  void lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,
                            size_t lirIndex);
  void defineUntypedPhi(MPhi* phi, size_t lirIndex);
  void lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,
                          size_t lirIndex);
  void defineInt64Phi(MPhi* phi, size_t lirIndex);

  void lowerForALUInt64(
      LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins,
      MDefinition* mir, MDefinition* lhs, MDefinition* rhs);
  void lowerForMulInt64(LMulI64* ins, MMul* mir, MDefinition* lhs,
                        MDefinition* rhs);

  // Returns a box allocation. reg2 is ignored on 64-bit platforms.
  LBoxAllocation useBoxFixed(MDefinition* mir, Register reg1, Register,
                             bool useAtStart = false);

  // x86 has constraints on what registers can be formatted for 1-byte
  // stores and loads; on x64 all registers are okay.
  LAllocation useByteOpRegister(MDefinition* mir);
  LAllocation useByteOpRegisterAtStart(MDefinition* mir);
  LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir);
  LDefinition tempByteOpRegister();

  LDefinition tempToUnbox();

  bool needTempForPostBarrier() { return true; }

  void lowerDivI64(MDiv* div);
  void lowerModI64(MMod* mod);
  void lowerUDivI64(MDiv* div);
  void lowerUModI64(MMod* mod);

 public:
  void visitBox(MBox* box) override;
  void visitUnbox(MUnbox* unbox) override;
  void visitReturn(MReturn* ret) override;
  void visitCompareExchangeTypedArrayElement(
      MCompareExchangeTypedArrayElement* ins) override;
  void visitAtomicExchangeTypedArrayElement(
      MAtomicExchangeTypedArrayElement* ins) override;
  void visitAtomicTypedArrayElementBinop(
      MAtomicTypedArrayElementBinop* ins) override;
  void visitWasmUnsignedToDouble(MWasmUnsignedToDouble* ins) override;
  void visitWasmUnsignedToFloat32(MWasmUnsignedToFloat32* ins) override;
  void visitAsmJSLoadHeap(MAsmJSLoadHeap* ins) override;
  void visitAsmJSStoreHeap(MAsmJSStoreHeap* ins) override;
  void visitWasmCompareExchangeHeap(MWasmCompareExchangeHeap* ins) override;
  void visitWasmAtomicExchangeHeap(MWasmAtomicExchangeHeap* ins) override;
  void visitWasmAtomicBinopHeap(MWasmAtomicBinopHeap* ins) override;
  void visitWasmLoad(MWasmLoad* ins) override;
  void visitWasmStore(MWasmStore* ins) override;
  void visitSubstr(MSubstr* ins) override;
  void visitRandom(MRandom* ins) override;
  void visitWasmTruncateToInt64(MWasmTruncateToInt64* ins) override;
  void visitInt64ToFloatingPoint(MInt64ToFloatingPoint* ins) override;
  void visitExtendInt32ToInt64(MExtendInt32ToInt64* ins) override;
  void visitSignExtendInt64(MSignExtendInt64* ins) override;
};

typedef LIRGeneratorX64 LIRGeneratorSpecific;

}  // namespace jit
}  // namespace js

#endif /* jit_x64_Lowering_x64_h */
