src/third_party/mozjs-45/js/src/jit/arm64/Lowering-arm64.h

/* -*- 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_arm64_Lowering_arm64_h
#define jit_arm64_Lowering_arm64_h

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

namespace js {
namespace jit {

class LIRGeneratorARM64 : public LIRGeneratorShared
{
  public:
    LIRGeneratorARM64(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph)
      : LIRGeneratorShared(gen, graph, lirGraph)
    { }

  protected:
    // Adds a box input to an instruction, setting operand |n| to the type and
    // |n+1| to the payload.
    void useBoxFixed(LInstruction* lir, size_t n, MDefinition* mir, Register reg1, Register reg2,
                     bool useAtStart = false);

    LAllocation useByteOpRegister(MDefinition* mir);
    LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir);

    inline LDefinition tempToUnbox() {
        return temp();
    }

    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 defineUntypedPhi(MPhi* phi, size_t lirIndex);
    void lowerForShift(LInstructionHelper<1, 2, 0>* ins, MDefinition* mir, MDefinition* lhs,
                       MDefinition* rhs);
    void lowerUrshD(MUrsh* 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 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 lowerForCompIx4(LSimdBinaryCompIx4* ins, MSimdBinaryComp* mir,
                         MDefinition* lhs, MDefinition* rhs)
    {
        return lowerForFPU(ins, mir, lhs, rhs);
    }

    void lowerForCompFx4(LSimdBinaryCompFx4* ins, MSimdBinaryComp* mir,
                         MDefinition* lhs, MDefinition* rhs)
    {
        return lowerForFPU(ins, mir, lhs, rhs);
    }

    void lowerForBitAndAndBranch(LBitAndAndBranch* baab, MInstruction* mir,
                                 MDefinition* lhs, MDefinition* rhs);
    void lowerTruncateDToInt32(MTruncateToInt32* ins);
    void lowerTruncateFToInt32(MTruncateToInt32* ins);
    void lowerDivI(MDiv* div);
    void lowerModI(MMod* mod);
    void lowerMulI(MMul* mul, MDefinition* lhs, MDefinition* rhs);
    void lowerUDiv(MDiv* div);
    void lowerUMod(MMod* mod);
    void visitPowHalf(MPowHalf* ins);
    void visitAsmJSNeg(MAsmJSNeg* ins);

    LTableSwitchV* newLTableSwitchV(MTableSwitch* ins);
    LTableSwitch* newLTableSwitch(const LAllocation& in,
                                  const LDefinition& inputCopy,
                                  MTableSwitch* ins);

  public:
    void visitBox(MBox* box);
    void visitUnbox(MUnbox* unbox);
    void visitReturn(MReturn* ret);
    void lowerPhi(MPhi* phi);
    void visitGuardShape(MGuardShape* ins);
    void visitGuardObjectGroup(MGuardObjectGroup* ins);
    void visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble* ins);
    void visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32* ins);
    void visitAsmJSLoadHeap(MAsmJSLoadHeap* ins);
    void visitAsmJSStoreHeap(MAsmJSStoreHeap* ins);
    void visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr* ins);
    void visitAsmJSCompareExchangeHeap(MAsmJSCompareExchangeHeap* ins);
    void visitAsmJSAtomicExchangeHeap(MAsmJSAtomicExchangeHeap* ins);
    void visitAsmJSAtomicBinopHeap(MAsmJSAtomicBinopHeap* ins);
    void visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic* ins);
    void visitSimdBinaryArith(MSimdBinaryArith* ins);
    void visitSimdSelect(MSimdSelect* ins);
    void visitSimdSplatX4(MSimdSplatX4* ins);
    void visitSimdValueX4(MSimdValueX4* ins);
    void visitCompareExchangeTypedArrayElement(MCompareExchangeTypedArrayElement* ins);
    void visitAtomicExchangeTypedArrayElement(MAtomicExchangeTypedArrayElement* ins);
    void visitAtomicTypedArrayElementBinop(MAtomicTypedArrayElementBinop* ins);
    void visitSubstr(MSubstr* ins);
    void visitRandom(MRandom* ins);
};

typedef LIRGeneratorARM64 LIRGeneratorSpecific;

} // namespace jit
} // namespace js

#endif /* jit_arm64_Lowering_arm64_h */