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comparison: js/src/jit/x86/Lowering-x86.h
js/src/jit/x86/Lowering-x86.h
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 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/shared/Lowering-x86-shared.h" | |
| 11 | |
| 12 namespace js { | |
| 13 namespace jit { | |
| 14 | |
| 15 class LIRGeneratorX86 : public LIRGeneratorX86Shared | |
| 16 { | |
| 17 public: | |
| 18 LIRGeneratorX86(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph) | |
| 19 : LIRGeneratorX86Shared(gen, graph, lirGraph) | |
| 20 { } | |
| 21 | |
| 22 protected: | |
| 23 // Adds a box input to an instruction, setting operand |n| to the type and | |
| 24 // |n+1| to the payload. | |
| 25 bool useBox(LInstruction *lir, size_t n, MDefinition *mir, | |
| 26 LUse::Policy policy = LUse::REGISTER, bool useAtStart = false); | |
| 27 bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register reg2); | |
| 28 | |
| 29 // It's a trap! On x86, the 1-byte store can only use one of | |
| 30 // {al,bl,cl,dl,ah,bh,ch,dh}. That means if the register allocator | |
| 31 // gives us one of {edi,esi,ebp,esp}, we're out of luck. (The formatter | |
| 32 // will assert on us.) Ideally, we'd just ask the register allocator to | |
| 33 // give us one of {al,bl,cl,dl}. For now, just useFixed(al). | |
| 34 LAllocation useByteOpRegister(MDefinition *mir); | |
| 35 LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition *mir); | |
| 36 | |
| 37 inline LDefinition tempToUnbox() { | |
| 38 return LDefinition::BogusTemp(); | |
| 39 } | |
| 40 | |
| 41 bool needTempForPostBarrier() { return true; } | |
| 42 | |
| 43 LDefinition tempForDispatchCache(MIRType outputType = MIRType_None); | |
| 44 | |
| 45 void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex); | |
| 46 bool defineUntypedPhi(MPhi *phi, size_t lirIndex); | |
| 47 | |
| 48 public: | |
| 49 bool visitBox(MBox *box); | |
| 50 bool visitUnbox(MUnbox *unbox); | |
| 51 bool visitReturn(MReturn *ret); | |
| 52 bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins); | |
| 53 bool visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32 *ins); | |
| 54 bool visitAsmJSLoadHeap(MAsmJSLoadHeap *ins); | |
| 55 bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins); | |
| 56 bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins); | |
| 57 bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins); | |
| 58 bool lowerPhi(MPhi *phi); | |
| 59 | |
| 60 static bool allowTypedElementHoleCheck() { | |
| 61 return true; | |
| 62 } | |
| 63 | |
| 64 static bool allowStaticTypedArrayAccesses() { | |
| 65 return true; | |
| 66 } | |
| 67 | |
| 68 static bool allowFloat32Optimizations() { | |
| 69 return true; | |
| 70 } | |
| 71 | |
| 72 static bool allowInlineForkJoinGetSlice() { | |
| 73 return true; | |
| 74 } | |
| 75 }; | |
| 76 | |
| 77 typedef LIRGeneratorX86 LIRGeneratorSpecific; | |
| 78 | |
| 79 } // namespace js | |
| 80 } // namespace jit | |
| 81 | |
| 82 #endif /* jit_x86_Lowering_x86_h */ |
