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/*
* Copyright (C) 2013-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(DFG_JIT)
#include "DFGOperations.h"
#include "DFGSlowPathGenerator.h"
#include "DFGSpeculativeJIT.h"
#include <wtf/Vector.h>
namespace JSC { namespace DFG {
class SaneStringGetByValSlowPathGenerator final : public JumpingSlowPathGenerator<MacroAssembler::Jump> {
WTF_MAKE_TZONE_ALLOCATED(SaneStringGetByValSlowPathGenerator);
public:
SaneStringGetByValSlowPathGenerator(
const MacroAssembler::Jump& from, SpeculativeJIT* jit, JSValueRegs resultRegs, JITCompiler::LinkableConstant globalObject, GPRReg baseReg, GPRReg propertyReg)
: JumpingSlowPathGenerator<MacroAssembler::Jump>(from, jit)
, m_resultRegs(resultRegs)
, m_globalObject(globalObject)
, m_baseReg(baseReg)
, m_propertyReg(propertyReg)
{
jit->silentSpillAllRegistersImpl(false, m_plans, extractResult(resultRegs));
}
private:
void generateInternal(SpeculativeJIT* jit) final
{
linkFrom(jit);
MacroAssembler::Jump isNeg = jit->branch32(
MacroAssembler::LessThan, m_propertyReg, MacroAssembler::TrustedImm32(0));
#if USE(JSVALUE64)
jit->move(
MacroAssembler::TrustedImm64(JSValue::encode(jsUndefined())), m_resultRegs.gpr());
#else
jit->move(
MacroAssembler::TrustedImm32(JSValue::UndefinedTag), m_resultRegs.tagGPR());
jit->move(
MacroAssembler::TrustedImm32(0), m_resultRegs.payloadGPR());
#endif
jumpTo(jit);
isNeg.link(jit);
jit->callOperationWithSilentSpill(m_plans, operationGetByValStringInt, extractResult(m_resultRegs), m_globalObject, m_baseReg, m_propertyReg);
jumpTo(jit);
}
JSValueRegs m_resultRegs;
JITCompiler::LinkableConstant m_globalObject;
GPRReg m_baseReg;
GPRReg m_propertyReg;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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