Lowering-arm64.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * vim: set ts=8 sts=2 et sw=2 tw=80:

 * 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_arm64_Lowering_arm64_h

#define jit_arm64_Lowering_arm64_h

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

namespace js {

namespace jit {

class LIRGeneratorARM64 : public LIRGeneratorShared {

 protected:

  LIRGeneratorARM64(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph)

      : LIRGeneratorShared(gen, graph, lirGraph) {}

  // Returns a box allocation. reg2 is ignored on 64-bit platforms.

  LBoxAllocation useBoxFixed(MDefinition* mir, Register reg1, Register reg2,

                             bool useAtStart = false);

  LAllocation useByteOpRegister(MDefinition* mir);

  LAllocation useByteOpRegisterAtStart(MDefinition* mir);

  LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir);

  LDefinition tempByteOpRegister();

  LDefinition tempToUnbox();

  bool needTempForPostBarrier() { return true; }

  // ARM64 has a scratch register, so no need for another temp for dispatch ICs.

  LDefinition tempForDispatchCache(MIRType outputType = MIRType::None) {

    return LDefinition::BogusTemp();

  void lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,

                            size_t lirIndex);

  void lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block,

                          size_t lirIndex) {

    lowerTypedPhiInput(phi, inputPosition, block, lirIndex);

  void defineInt64Phi(MPhi* phi, size_t lirIndex) {

    defineTypedPhi(phi, lirIndex);

  void lowerForShift(LInstructionHelper<1, 2, 0>* ins, MDefinition* mir,

                     MDefinition* lhs, MDefinition* rhs);

  void lowerUrshD(MUrsh* mir);

  void lowerPowOfTwoI(MPow* mir);

  void lowerForALU(LInstructionHelper<1, 1, 0>* ins, MDefinition* mir,

                   MDefinition* input);

  void lowerForALU(LInstructionHelper<1, 2, 0>* ins, MDefinition* mir,

                   MDefinition* lhs, MDefinition* rhs);

  void lowerForALUInt64(LInstructionHelper<INT64_PIECES, INT64_PIECES, 0>* ins,

                        MDefinition* mir, MDefinition* input);

  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);

  template <size_t Temps>

  void lowerForShiftInt64(

      LInstructionHelper<INT64_PIECES, INT64_PIECES + 1, Temps>* ins,

      MDefinition* mir, MDefinition* lhs, MDefinition* rhs);

  void lowerForCompareI64AndBranch(MTest* mir, MCompare* comp, JSOp op,

                                   MDefinition* left, MDefinition* right,

                                   MBasicBlock* ifTrue, MBasicBlock* ifFalse);

  void lowerForFPU(LInstructionHelper<1, 1, 0>* ins, MDefinition* mir,

                   MDefinition* input);

  template <size_t Temps>

  void lowerForFPU(LInstructionHelper<1, 2, Temps>* ins, MDefinition* mir,

                   MDefinition* lhs, MDefinition* rhs);

  void lowerBuiltinInt64ToFloatingPoint(MBuiltinInt64ToFloatingPoint* ins);

  void lowerWasmBuiltinTruncateToInt64(MWasmBuiltinTruncateToInt64* ins);

  void lowerForBitAndAndBranch(LBitAndAndBranch* baab, MInstruction* mir,

                               MDefinition* lhs, MDefinition* rhs);

  void lowerWasmBuiltinTruncateToInt32(MWasmBuiltinTruncateToInt32* ins);

  void lowerTruncateDToInt32(MTruncateToInt32* ins);

  void lowerTruncateFToInt32(MTruncateToInt32* ins);

  void lowerDivI(MDiv* div);

  void lowerModI(MMod* mod);

  void lowerDivI64(MDiv* div);

  void lowerWasmBuiltinDivI64(MWasmBuiltinDivI64* div);

  void lowerModI64(MMod* mod);

  void lowerWasmBuiltinModI64(MWasmBuiltinModI64* mod);

  void lowerUDivI64(MDiv* div);

  void lowerUModI64(MMod* mod);

  void lowerNegI(MInstruction* ins, MDefinition* input);

  void lowerNegI64(MInstruction* ins, MDefinition* input);

  void lowerMulI(MMul* mul, MDefinition* lhs, MDefinition* rhs);

  void lowerUDiv(MDiv* div);

  void lowerUMod(MMod* mod);

  void lowerWasmSelectI(MWasmSelect* select);

  void lowerWasmSelectI64(MWasmSelect* select);

  bool canSpecializeWasmCompareAndSelect(MCompare::CompareType compTy,

                                         MIRType insTy);

  void lowerWasmCompareAndSelect(MWasmSelect* ins, MDefinition* lhs,

                                 MDefinition* rhs, MCompare::CompareType compTy,

                                 JSOp jsop);

  void lowerBigIntLsh(MBigIntLsh* ins);

  void lowerBigIntRsh(MBigIntRsh* ins);

  void lowerBigIntDiv(MBigIntDiv* ins);

  void lowerBigIntMod(MBigIntMod* ins);

  void lowerAtomicLoad64(MLoadUnboxedScalar* ins);

  void lowerAtomicStore64(MStoreUnboxedScalar* ins);

#ifdef ENABLE_WASM_SIMD

  bool canFoldReduceSimd128AndBranch(wasm::SimdOp op);

  bool canEmitWasmReduceSimd128AtUses(MWasmReduceSimd128* ins);

#endif

  LTableSwitchV* newLTableSwitchV(MTableSwitch* ins);

  LTableSwitch* newLTableSwitch(const LAllocation& in,

                                const LDefinition& inputCopy,

                                MTableSwitch* ins);

  void lowerPhi(MPhi* phi);

};

typedef LIRGeneratorARM64 LIRGeneratorSpecific;

}  // namespace jit

}  // namespace js

#endif /* jit_arm64_Lowering_arm64_h */