Lowering-x86.h (3396B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- 2 * vim: set ts=8 sts=2 et sw=2 tw=80: 3 * This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef jit_x86_Lowering_x86_h 8 #define jit_x86_Lowering_x86_h 9 10 #include "jit/x86-shared/Lowering-x86-shared.h" 11 12 namespace js { 13 namespace jit { 14 15 class LIRGeneratorX86 : public LIRGeneratorX86Shared { 16 protected: 17 LIRGeneratorX86(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph) 18 : LIRGeneratorX86Shared(gen, graph, lirGraph) {} 19 20 // Returns a box allocation with type set to reg1 and payload set to reg2. 21 LBoxAllocation useBoxFixed(MDefinition* mir, Register reg1, Register reg2, 22 bool useAtStart = false); 23 24 // It's a trap! On x86, the 1-byte store can only use one of 25 // {al,bl,cl,dl,ah,bh,ch,dh}. That means if the register allocator 26 // gives us one of {edi,esi,ebp,esp}, we're out of luck. (The formatter 27 // will assert on us.) Ideally, we'd just ask the register allocator to 28 // give us one of {al,bl,cl,dl}. For now, just useFixed(al). 29 LAllocation useByteOpRegister(MDefinition* mir); 30 LAllocation useByteOpRegisterAtStart(MDefinition* mir); 31 LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir); 32 LDefinition tempByteOpRegister(); 33 34 inline LDefinition tempToUnbox() { return LDefinition::BogusTemp(); } 35 36 bool needTempForPostBarrier() { return true; } 37 38 void lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block, 39 size_t lirIndex); 40 41 void lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block, 42 size_t lirIndex); 43 void defineInt64Phi(MPhi* phi, size_t lirIndex); 44 45 void lowerForALUInt64(LInstructionHelper<INT64_PIECES, INT64_PIECES, 0>* ins, 46 MDefinition* mir, MDefinition* input); 47 void lowerForALUInt64( 48 LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins, 49 MDefinition* mir, MDefinition* lhs, MDefinition* rhs); 50 void lowerForMulInt64(LMulI64* ins, MMul* mir, MDefinition* lhs, 51 MDefinition* rhs); 52 53 template <class LInstr> 54 void lowerForShiftInt64(LInstr* ins, MDefinition* mir, MDefinition* lhs, 55 MDefinition* rhs); 56 57 void lowerTruncateDToInt32(MTruncateToInt32* ins); 58 void lowerTruncateFToInt32(MTruncateToInt32* ins); 59 void lowerBuiltinInt64ToFloatingPoint(MBuiltinInt64ToFloatingPoint* ins); 60 void lowerWasmBuiltinTruncateToInt32(MWasmBuiltinTruncateToInt32* ins); 61 void lowerWasmBuiltinTruncateToInt64(MWasmBuiltinTruncateToInt64* ins); 62 void lowerDivI64(MDiv* div); 63 void lowerWasmBuiltinDivI64(MWasmBuiltinDivI64* div); 64 void lowerModI64(MMod* mod); 65 void lowerWasmBuiltinModI64(MWasmBuiltinModI64* mod); 66 void lowerUDivI64(MDiv* div); 67 void lowerUModI64(MMod* mod); 68 69 void lowerBigIntPtrDiv(MBigIntPtrDiv* ins); 70 void lowerBigIntPtrMod(MBigIntPtrMod* ins); 71 72 void lowerAtomicLoad64(MLoadUnboxedScalar* ins); 73 void lowerAtomicStore64(MStoreUnboxedScalar* ins); 74 75 void lowerPhi(MPhi* phi); 76 77 public: 78 static bool allowTypedElementHoleCheck() { return true; } 79 }; 80 81 using LIRGeneratorSpecific = LIRGeneratorX86; 82 83 } // namespace jit 84 } // namespace js 85 86 #endif /* jit_x86_Lowering_x86_h */