The Tor Browser: js/src/jit/shared/BaselineIC-x86-shared.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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 #include "jit/BaselineHelpers.h"

     8 #include "jit/BaselineIC.h"

    10 using namespace js;

    11 using namespace js::jit;

    13 bool

    14 ICCompare_Double::Compiler::generateStubCode(MacroAssembler &masm)

    15 {

    16     Label failure, notNaN;

    17     masm.ensureDouble(R0, FloatReg0, &failure);

    18     masm.ensureDouble(R1, FloatReg1, &failure);

    20     Register dest = R0.scratchReg();

    22     Assembler::DoubleCondition cond = JSOpToDoubleCondition(op);

    23     masm.mov(ImmWord(0), dest);

    24     masm.compareDouble(cond, FloatReg0, FloatReg1);

    25     masm.setCC(Assembler::ConditionFromDoubleCondition(cond), dest);

    27     // Check for NaN, if needed.

    28     Assembler::NaNCond nanCond = Assembler::NaNCondFromDoubleCondition(cond);

    29     if (nanCond != Assembler::NaN_HandledByCond) {

    30       masm.j(Assembler::NoParity, &notNaN);

    31       masm.mov(ImmWord(nanCond == Assembler::NaN_IsTrue), dest);

    32       masm.bind(&notNaN);

    33     }

    35     masm.tagValue(JSVAL_TYPE_BOOLEAN, dest, R0);

    36     EmitReturnFromIC(masm);

    38     // Failure case - jump to next stub

    39     masm.bind(&failure);

    40     EmitStubGuardFailure(masm);

    41     return true;

    42 }

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