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js/src/jit/shared/BaselineIC-x86-shared.cpp@6474c204b198 (annotated)

js/src/jit/shared/BaselineIC-x86-shared.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

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

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0	2	* vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0	3	* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#include "jit/BaselineHelpers.h"
michael@0	8	#include "jit/BaselineIC.h"
michael@0	9
michael@0	10	using namespace js;
michael@0	11	using namespace js::jit;
michael@0	12
michael@0	13	bool
michael@0	14	ICCompare_Double::Compiler::generateStubCode(MacroAssembler &masm)
michael@0	15	{
michael@0	16	Label failure, notNaN;
michael@0	17	masm.ensureDouble(R0, FloatReg0, &failure);
michael@0	18	masm.ensureDouble(R1, FloatReg1, &failure);
michael@0	19
michael@0	20	Register dest = R0.scratchReg();
michael@0	21
michael@0	22	Assembler::DoubleCondition cond = JSOpToDoubleCondition(op);
michael@0	23	masm.mov(ImmWord(0), dest);
michael@0	24	masm.compareDouble(cond, FloatReg0, FloatReg1);
michael@0	25	masm.setCC(Assembler::ConditionFromDoubleCondition(cond), dest);
michael@0	26
michael@0	27	// Check for NaN, if needed.
michael@0	28	Assembler::NaNCond nanCond = Assembler::NaNCondFromDoubleCondition(cond);
michael@0	29	if (nanCond != Assembler::NaN_HandledByCond) {
michael@0	30	masm.j(Assembler::NoParity, &notNaN);
michael@0	31	masm.mov(ImmWord(nanCond == Assembler::NaN_IsTrue), dest);
michael@0	32	masm.bind(&notNaN);
michael@0	33	}
michael@0	34
michael@0	35	masm.tagValue(JSVAL_TYPE_BOOLEAN, dest, R0);
michael@0	36	EmitReturnFromIC(masm);
michael@0	37
michael@0	38	// Failure case - jump to next stub
michael@0	39	masm.bind(&failure);
michael@0	40	EmitStubGuardFailure(masm);
michael@0	41	return true;
michael@0	42	}