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/*
* Copyright (C) 2012 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.
*/
#ifndef DFGCallArrayAllocatorSlowPathGenerator_h
#define DFGCallArrayAllocatorSlowPathGenerator_h
#include <wtf/Platform.h>
#if ENABLE(DFG_JIT)
#include "DFGCommon.h"
#include "DFGSlowPathGenerator.h"
#include "DFGSpeculativeJIT.h"
#include <wtf/Vector.h>
namespace JSC { namespace DFG {
class CallArrayAllocatorSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
public:
CallArrayAllocatorSlowPathGenerator(
MacroAssembler::JumpList from, SpeculativeJIT* jit, P_DFGOperation_EStZ function,
GPRReg resultGPR, GPRReg storageGPR, Structure* structure, size_t size)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_storageGPR(storageGPR)
, m_structure(structure)
, m_size(size)
{
ASSERT(size < static_cast<size_t>(std::numeric_limits<int32_t>::max()));
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
void generateInternal(SpeculativeJIT* jit)
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
jit->callOperation(m_function, m_resultGPR, m_structure, m_size);
GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i], canTrample);
jit->m_jit.loadPtr(MacroAssembler::Address(m_resultGPR, JSObject::butterflyOffset()), m_storageGPR);
jumpTo(jit);
}
private:
P_DFGOperation_EStZ m_function;
GPRReg m_resultGPR;
GPRReg m_storageGPR;
Structure* m_structure;
size_t m_size;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
class CallArrayAllocatorWithVariableSizeSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
public:
CallArrayAllocatorWithVariableSizeSlowPathGenerator(
MacroAssembler::JumpList from, SpeculativeJIT* jit, P_DFGOperation_EStZ function,
GPRReg resultGPR, Structure* contiguousStructure, Structure* arrayStorageStructure, GPRReg sizeGPR)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_contiguousStructure(contiguousStructure)
, m_arrayStorageStructure(arrayStorageStructure)
, m_sizeGPR(sizeGPR)
{
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
void generateInternal(SpeculativeJIT* jit)
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
GPRReg scratchGPR = AssemblyHelpers::selectScratchGPR(m_sizeGPR);
MacroAssembler::Jump bigLength = jit->m_jit.branch32(MacroAssembler::AboveOrEqual, m_sizeGPR, MacroAssembler::TrustedImm32(MIN_SPARSE_ARRAY_INDEX));
jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_contiguousStructure), scratchGPR);
MacroAssembler::Jump done = jit->m_jit.jump();
bigLength.link(&jit->m_jit);
jit->m_jit.move(MacroAssembler::TrustedImmPtr(m_arrayStorageStructure), scratchGPR);
done.link(&jit->m_jit);
jit->callOperation(m_function, m_resultGPR, scratchGPR, m_sizeGPR);
GPRReg canTrample = SpeculativeJIT::pickCanTrample(m_resultGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i], canTrample);
jumpTo(jit);
}
private:
P_DFGOperation_EStZ m_function;
GPRReg m_resultGPR;
Structure* m_contiguousStructure;
Structure* m_arrayStorageStructure;
GPRReg m_sizeGPR;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGCallArrayAllocatorSlowPathGenerator_h
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