michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef jit_x86_Lowering_x86_h
michael@0: #define jit_x86_Lowering_x86_h
michael@0: 
michael@0: #include "jit/shared/Lowering-x86-shared.h"
michael@0: 
michael@0: namespace js {
michael@0: namespace jit {
michael@0: 
michael@0: class LIRGeneratorX86 : public LIRGeneratorX86Shared
michael@0: {
michael@0:   public:
michael@0:     LIRGeneratorX86(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)
michael@0:       : LIRGeneratorX86Shared(gen, graph, lirGraph)
michael@0:     { }
michael@0: 
michael@0:   protected:
michael@0:     // Adds a box input to an instruction, setting operand |n| to the type and
michael@0:     // |n+1| to the payload.
michael@0:     bool useBox(LInstruction *lir, size_t n, MDefinition *mir,
michael@0:                 LUse::Policy policy = LUse::REGISTER, bool useAtStart = false);
michael@0:     bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register reg2);
michael@0: 
michael@0:     // It's a trap! On x86, the 1-byte store can only use one of
michael@0:     // {al,bl,cl,dl,ah,bh,ch,dh}. That means if the register allocator
michael@0:     // gives us one of {edi,esi,ebp,esp}, we're out of luck. (The formatter
michael@0:     // will assert on us.) Ideally, we'd just ask the register allocator to
michael@0:     // give us one of {al,bl,cl,dl}. For now, just useFixed(al).
michael@0:     LAllocation useByteOpRegister(MDefinition *mir);
michael@0:     LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition *mir);
michael@0: 
michael@0:     inline LDefinition tempToUnbox() {
michael@0:         return LDefinition::BogusTemp();
michael@0:     }
michael@0: 
michael@0:     bool needTempForPostBarrier() { return true; }
michael@0: 
michael@0:     LDefinition tempForDispatchCache(MIRType outputType = MIRType_None);
michael@0: 
michael@0:     void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex);
michael@0:     bool defineUntypedPhi(MPhi *phi, size_t lirIndex);
michael@0: 
michael@0:   public:
michael@0:     bool visitBox(MBox *box);
michael@0:     bool visitUnbox(MUnbox *unbox);
michael@0:     bool visitReturn(MReturn *ret);
michael@0:     bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins);
michael@0:     bool visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32 *ins);
michael@0:     bool visitAsmJSLoadHeap(MAsmJSLoadHeap *ins);
michael@0:     bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins);
michael@0:     bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins);
michael@0:     bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins);
michael@0:     bool lowerPhi(MPhi *phi);
michael@0: 
michael@0:     static bool allowTypedElementHoleCheck() {
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     static bool allowStaticTypedArrayAccesses() {
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     static bool allowFloat32Optimizations() {
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     static bool allowInlineForkJoinGetSlice() {
michael@0:         return true;
michael@0:     }
michael@0: };
michael@0: 
michael@0: typedef LIRGeneratorX86 LIRGeneratorSpecific;
michael@0: 
michael@0: } // namespace js
michael@0: } // namespace jit
michael@0: 
michael@0: #endif /* jit_x86_Lowering_x86_h */