The Tor Browser: js/src/jit/x64/Lowering-x64.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     7 #ifndef jit_x64_Lowering_x64_h

     8 #define jit_x64_Lowering_x64_h

    10 #include "jit/shared/Lowering-x86-shared.h"

    12 namespace js {

    13 namespace jit {

    15 class LIRGeneratorX64 : public LIRGeneratorX86Shared

    16 {

    17   public:

    18     LIRGeneratorX64(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)

    19       : LIRGeneratorX86Shared(gen, graph, lirGraph)

    20     { }

    22   protected:

    23     void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex);

    24     bool defineUntypedPhi(MPhi *phi, size_t lirIndex);

    26     // Adds a use at operand |n| of a value-typed insturction.

    27     bool useBox(LInstruction *lir, size_t n, MDefinition *mir,

    28                 LUse::Policy policy = LUse::REGISTER, bool useAtStart = false);

    29     bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register);

    31     // x86 has constraints on what registers can be formatted for 1-byte

    32     // stores and loads; on x64 all registers are okay.

    33     LAllocation useByteOpRegister(MDefinition *mir);

    34     LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition *mir);

    36     LDefinition tempToUnbox();

    38     bool needTempForPostBarrier() { return false; }

    40     // x64 has a scratch register, so no need for another temp for dispatch

    41     // ICs.

    42     LDefinition tempForDispatchCache(MIRType outputType = MIRType_None) {

    43         return LDefinition::BogusTemp();

    44     }

    46   public:

    47     bool visitBox(MBox *box);

    48     bool visitUnbox(MUnbox *unbox);

    49     bool visitReturn(MReturn *ret);

    50     bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins);

    51     bool visitAsmJSUnsignedToFloat32(MAsmJSUnsignedToFloat32 *ins);

    52     bool visitAsmJSLoadHeap(MAsmJSLoadHeap *ins);

    53     bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins);

    54     bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins);

    55     bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins);

    57     static bool allowFloat32Optimizations() {

    58         return true;

    59     }

    61     static bool allowInlineForkJoinGetSlice() {

    62         return true;

    63     }

    64 };

    66 typedef LIRGeneratorX64 LIRGeneratorSpecific;

    68 } // namespace jit

    69 } // namespace js

    71 #endif /* jit_x64_Lowering_x64_h */

The Tor Browser / file revision