1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/x86/Lowering-x86.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,82 @@
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_x86_Lowering_x86_h
1.11 +#define jit_x86_Lowering_x86_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 LIRGeneratorX86 : public LIRGeneratorX86Shared
1.19 +{
1.20 + public:
1.21 + LIRGeneratorX86(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)
1.22 + : LIRGeneratorX86Shared(gen, graph, lirGraph)
1.23 + { }
1.24 +
1.25 + protected:
1.26 + // Adds a box input to an instruction, setting operand |n| to the type and
1.27 + // |n+1| to the payload.
1.28 + bool useBox(LInstruction *lir, size_t n, MDefinition *mir,
1.29 + LUse::Policy policy = LUse::REGISTER, bool useAtStart = false);
1.30 + bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register reg2);
1.31 +
1.32 + // It's a trap! On x86, the 1-byte store can only use one of
1.33 + // {al,bl,cl,dl,ah,bh,ch,dh}. That means if the register allocator
1.34 + // gives us one of {edi,esi,ebp,esp}, we're out of luck. (The formatter
1.35 + // will assert on us.) Ideally, we'd just ask the register allocator to
1.36 + // give us one of {al,bl,cl,dl}. For now, just useFixed(al).
1.37 + LAllocation useByteOpRegister(MDefinition *mir);
1.38 + LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition *mir);
1.39 +
1.40 + inline LDefinition tempToUnbox() {
1.41 + return LDefinition::BogusTemp();
1.42 + }
1.43 +
1.44 + bool needTempForPostBarrier() { return true; }
1.45 +
1.46 + LDefinition tempForDispatchCache(MIRType outputType = MIRType_None);
1.47 +
1.48 + void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex);
1.49 + bool defineUntypedPhi(MPhi *phi, size_t lirIndex);
1.50 +
1.51 + public:
1.52 + bool visitBox(MBox *box);
1.53 + bool visitUnbox(MUnbox *unbox);
1.54 + bool visitReturn(MReturn *ret);
1.55 + bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins);
1.56 + bool visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32 *ins);
1.57 + bool visitAsmJSLoadHeap(MAsmJSLoadHeap *ins);
1.58 + bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins);
1.59 + bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins);
1.60 + bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins);
1.61 + bool lowerPhi(MPhi *phi);
1.62 +
1.63 + static bool allowTypedElementHoleCheck() {
1.64 + return true;
1.65 + }
1.66 +
1.67 + static bool allowStaticTypedArrayAccesses() {
1.68 + return true;
1.69 + }
1.70 +
1.71 + static bool allowFloat32Optimizations() {
1.72 + return true;
1.73 + }
1.74 +
1.75 + static bool allowInlineForkJoinGetSlice() {
1.76 + return true;
1.77 + }
1.78 +};
1.79 +
1.80 +typedef LIRGeneratorX86 LIRGeneratorSpecific;
1.81 +
1.82 +} // namespace js
1.83 +} // namespace jit
1.84 +
1.85 +#endif /* jit_x86_Lowering_x86_h */
