1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/x64/Lowering-x64.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jit_x64_Lowering_x64_h
1.11 +#define jit_x64_Lowering_x64_h
1.12 +
1.13 +#include "jit/shared/Lowering-x86-shared.h"
1.14 +
1.15 +namespace js {
1.16 +namespace jit {
1.17 +
1.18 +class LIRGeneratorX64 : public LIRGeneratorX86Shared
1.19 +{
1.20 + public:
1.21 + LIRGeneratorX64(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)
1.22 + : LIRGeneratorX86Shared(gen, graph, lirGraph)
1.23 + { }
1.24 +
1.25 + protected:
1.26 + void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex);
1.27 + bool defineUntypedPhi(MPhi *phi, size_t lirIndex);
1.28 +
1.29 + // Adds a use at operand |n| of a value-typed insturction.
1.30 + bool useBox(LInstruction *lir, size_t n, MDefinition *mir,
1.31 + LUse::Policy policy = LUse::REGISTER, bool useAtStart = false);
1.32 + bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register);
1.33 +
1.34 + // x86 has constraints on what registers can be formatted for 1-byte
1.35 + // stores and loads; on x64 all registers are okay.
1.36 + LAllocation useByteOpRegister(MDefinition *mir);
1.37 + LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition *mir);
1.38 +
1.39 + LDefinition tempToUnbox();
1.40 +
1.41 + bool needTempForPostBarrier() { return false; }
1.42 +
1.43 + // x64 has a scratch register, so no need for another temp for dispatch
1.44 + // ICs.
1.45 + LDefinition tempForDispatchCache(MIRType outputType = MIRType_None) {
1.46 + return LDefinition::BogusTemp();
1.47 + }
1.48 +
1.49 + public:
1.50 + bool visitBox(MBox *box);
1.51 + bool visitUnbox(MUnbox *unbox);
1.52 + bool visitReturn(MReturn *ret);
1.53 + bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins);
1.54 + bool visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32 *ins);
1.55 + bool visitAsmJSLoadHeap(MAsmJSLoadHeap *ins);
1.56 + bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins);
1.57 + bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins);
1.58 + bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins);
1.59 +
1.60 + static bool allowFloat32Optimizations() {
1.61 + return true;
1.62 + }
1.63 +
1.64 + static bool allowInlineForkJoinGetSlice() {
1.65 + return true;
1.66 + }
1.67 +};
1.68 +
1.69 +typedef LIRGeneratorX64 LIRGeneratorSpecific;
1.70 +
1.71 +} // namespace jit
1.72 +} // namespace js
1.73 +
1.74 +#endif /* jit_x64_Lowering_x64_h */
