DFGCallArrayAllocatorSlowPathGenerator.h [plain text]
#pragma once
#if ENABLE(DFG_JIT)
#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_JITOperation_EStZB function,
GPRReg resultGPR, GPRReg storageGPR, RegisteredStructure 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) override
{
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, m_storageGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i]);
jit->m_jit.exceptionCheck();
jit->m_jit.loadPtr(MacroAssembler::Address(m_resultGPR, JSObject::butterflyOffset()), m_storageGPR);
jumpTo(jit);
}
private:
P_JITOperation_EStZB m_function;
GPRReg m_resultGPR;
GPRReg m_storageGPR;
RegisteredStructure 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_JITOperation_EStZB function,
GPRReg resultGPR, RegisteredStructure contiguousStructure, RegisteredStructure arrayStorageStructure, GPRReg sizeGPR, GPRReg storageGPR)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_contiguousStructure(contiguousStructure)
, m_arrayStorageOrContiguousStructure(arrayStorageStructure)
, m_sizeGPR(sizeGPR)
, m_storageGPR(storageGPR)
{
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
void generateInternal(SpeculativeJIT* jit) override
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
GPRReg scratchGPR = AssemblyHelpers::selectScratchGPR(m_sizeGPR, m_storageGPR);
if (m_contiguousStructure.get() != m_arrayStorageOrContiguousStructure.get()) {
MacroAssembler::Jump bigLength = jit->m_jit.branch32(MacroAssembler::AboveOrEqual, m_sizeGPR, MacroAssembler::TrustedImm32(MIN_ARRAY_STORAGE_CONSTRUCTION_LENGTH));
jit->m_jit.move(SpeculativeJIT::TrustedImmPtr(m_contiguousStructure), scratchGPR);
MacroAssembler::Jump done = jit->m_jit.jump();
bigLength.link(&jit->m_jit);
jit->m_jit.move(SpeculativeJIT::TrustedImmPtr(m_arrayStorageOrContiguousStructure), scratchGPR);
done.link(&jit->m_jit);
} else
jit->m_jit.move(SpeculativeJIT::TrustedImmPtr(m_contiguousStructure), scratchGPR);
jit->callOperation(m_function, m_resultGPR, scratchGPR, m_sizeGPR, m_storageGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i]);
jit->m_jit.exceptionCheck();
jumpTo(jit);
}
private:
P_JITOperation_EStZB m_function;
GPRReg m_resultGPR;
RegisteredStructure m_contiguousStructure;
RegisteredStructure m_arrayStorageOrContiguousStructure;
GPRReg m_sizeGPR;
GPRReg m_storageGPR;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
class CallArrayAllocatorWithVariableStructureVariableSizeSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
public:
CallArrayAllocatorWithVariableStructureVariableSizeSlowPathGenerator(
MacroAssembler::JumpList from, SpeculativeJIT* jit, P_JITOperation_EStZB function,
GPRReg resultGPR, GPRReg structureGPR, GPRReg sizeGPR, GPRReg storageGPR)
: JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
, m_function(function)
, m_resultGPR(resultGPR)
, m_structureGPR(structureGPR)
, m_sizeGPR(sizeGPR)
, m_storageGPR(storageGPR)
{
jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
}
protected:
void generateInternal(SpeculativeJIT* jit) override
{
linkFrom(jit);
for (unsigned i = 0; i < m_plans.size(); ++i)
jit->silentSpill(m_plans[i]);
jit->callOperation(m_function, m_resultGPR, m_structureGPR, m_sizeGPR, m_storageGPR);
for (unsigned i = m_plans.size(); i--;)
jit->silentFill(m_plans[i]);
jit->m_jit.exceptionCheck();
jumpTo(jit);
}
private:
P_JITOperation_EStZB m_function;
GPRReg m_resultGPR;
GPRReg m_structureGPR;
GPRReg m_sizeGPR;
GPRReg m_storageGPR;
Vector<SilentRegisterSavePlan, 2> m_plans;
};
} }
#endif // ENABLE(DFG_JIT)