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Viewing changes to Source/JavaScriptCore/dfg/DFGAssemblyHelpers.cpp

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2013-02-18 14:24:18 UTC
  • Revision ID: package-import@ubuntu.com-20130218142418-eon0jmjg3nj438uy
Tags: upstream-2.3
Import upstream version 2.3

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Source/JavaScriptCore/dfg/DFGAssemblyHelpers.cpp
 
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/*
 
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 * Copyright (C) 2011 Apple Inc. All rights reserved.
 
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 *
 
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 * Redistribution and use in source and binary forms, with or without
 
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 * modification, are permitted provided that the following conditions
 
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 * are met:
 
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 * 1. Redistributions of source code must retain the above copyright
 
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 *    notice, this list of conditions and the following disclaimer.
 
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 * 2. Redistributions in binary form must reproduce the above copyright
 
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 *    notice, this list of conditions and the following disclaimer in the
 
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 *    documentation and/or other materials provided with the distribution.
 
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 *
 
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 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 
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 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 
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 */
 
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#include "config.h"
 
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#include "DFGAssemblyHelpers.h"
 
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#if ENABLE(DFG_JIT)
 
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namespace JSC { namespace DFG {
 
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ExecutableBase* AssemblyHelpers::executableFor(const CodeOrigin& codeOrigin)
 
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{
 
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    if (!codeOrigin.inlineCallFrame)
 
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        return m_codeBlock->ownerExecutable();
 
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    return codeOrigin.inlineCallFrame->executable.get();
 
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}
 
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Vector<BytecodeAndMachineOffset>& AssemblyHelpers::decodedCodeMapFor(CodeBlock* codeBlock)
 
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{
 
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    ASSERT(codeBlock == codeBlock->baselineVersion());
 
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    ASSERT(codeBlock->getJITType() == JITCode::BaselineJIT);
 
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    ASSERT(codeBlock->jitCodeMap());
 
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    HashMap<CodeBlock*, Vector<BytecodeAndMachineOffset> >::AddResult result = m_decodedCodeMaps.add(codeBlock, Vector<BytecodeAndMachineOffset>());
 
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    if (result.isNewEntry)
 
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        codeBlock->jitCodeMap()->decode(result.iterator->value);
 
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    return result.iterator->value;
 
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}
 
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#if ENABLE(SAMPLING_FLAGS)
 
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void AssemblyHelpers::setSamplingFlag(int32_t flag)
 
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{
 
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    ASSERT(flag >= 1);
 
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    ASSERT(flag <= 32);
 
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    or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags()));
 
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}
 
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void AssemblyHelpers::clearSamplingFlag(int32_t flag)
 
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{
 
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    ASSERT(flag >= 1);
 
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    ASSERT(flag <= 32);
 
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    and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags()));
 
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}
 
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#endif
 
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#if DFG_ENABLE(JIT_ASSERT)
 
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#if USE(JSVALUE64)
 
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void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
 
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{
 
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#if CPU(X86_64)
 
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    Jump checkInt32 = branch64(BelowOrEqual, gpr, TrustedImm64(static_cast<uintptr_t>(0xFFFFFFFFu)));
 
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    breakpoint();
 
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    checkInt32.link(this);
 
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#else
 
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    UNUSED_PARAM(gpr);
 
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#endif
 
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}
 
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void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
 
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{
 
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    Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
 
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    breakpoint();
 
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    checkJSInt32.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
 
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{
 
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    Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
 
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    breakpoint();
 
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    checkJSNumber.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
 
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{
 
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    Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
 
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    Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
 
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    checkJSInt32.link(this);
 
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    breakpoint();
 
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    checkJSNumber.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 
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{
 
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    Jump checkCell = branchTest64(MacroAssembler::Zero, gpr, GPRInfo::tagMaskRegister);
 
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    breakpoint();
 
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    checkCell.link(this);
 
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}
 
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#elif USE(JSVALUE32_64)
 
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void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
 
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{
 
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    UNUSED_PARAM(gpr);
 
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}
 
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void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
 
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{
 
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    Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 
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    breakpoint();
 
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    checkJSInt32.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
 
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{
 
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    Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 
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    Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 
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    breakpoint();
 
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    checkJSInt32.link(this);
 
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    checkJSDouble.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
 
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{
 
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    Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 
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    breakpoint();
 
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    checkJSDouble.link(this);
 
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}
 
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void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 
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{
 
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    Jump checkCell = branch32(Equal, gpr, TrustedImm32(JSValue::CellTag));
 
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    breakpoint();
 
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    checkCell.link(this);
 
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}
 
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#endif // USE(JSVALUE32_64)
 
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void AssemblyHelpers::jitAssertHasValidCallFrame()
 
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{
 
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    Jump checkCFR = branchTestPtr(Zero, GPRInfo::callFrameRegister, TrustedImm32(7));
 
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    breakpoint();
 
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    checkCFR.link(this);
 
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}
 
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#endif // DFG_ENABLE(JIT_ASSERT)
 
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} } // namespace JSC::DFG
 
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#endif // ENABLE(DFG_JIT)
 
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