JITOpcodes32_64.cpp [plain text]
#include "config.h"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "JITInlineMethods.h"
#include "JITStubCall.h"
#include "JSArray.h"
#include "JSCell.h"
#include "JSFunction.h"
#include "JSPropertyNameIterator.h"
#include "LinkBuffer.h"
namespace JSC {
PassRefPtr<ExecutableMemoryHandle> JIT::privateCompileCTIMachineTrampolines(JSGlobalData* globalData, TrampolineStructure *trampolines)
{
Label stringLengthBegin = align();
Jump string_failureCases1 = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
Jump string_failureCases2 = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info));
load32(Address(regT0, OBJECT_OFFSETOF(JSString, m_length)), regT2);
Jump string_failureCases3 = branch32(Above, regT2, TrustedImm32(INT_MAX));
move(regT2, regT0);
move(TrustedImm32(JSValue::Int32Tag), regT1);
ret();
JumpList callSlowCase;
JumpList constructSlowCase;
Label virtualCallLinkBegin = align();
callSlowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
callSlowCase.append(emitJumpIfNotType(regT0, regT1, JSFunctionType));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT1);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3);
emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callLazyLinkCall = call();
restoreReturnAddressBeforeReturn(regT3);
jump(regT0);
Label virtualConstructLinkBegin = align();
constructSlowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
constructSlowCase.append(emitJumpIfNotType(regT0, regT1, JSFunctionType));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT1);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3);
emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callLazyLinkConstruct = call();
restoreReturnAddressBeforeReturn(regT3);
jump(regT0);
Label virtualCallBegin = align();
callSlowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
callSlowCase.append(emitJumpIfNotType(regT0, regT1, JSFunctionType));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT1);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
Jump hasCodeBlock1 = branch32(GreaterThanOrEqual, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParametersForCall)), TrustedImm32(0));
preserveReturnAddressAfterCall(regT3);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callCompileCall = call();
restoreReturnAddressBeforeReturn(regT3);
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
hasCodeBlock1.link(this);
loadPtr(Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_jitCodeForCallWithArityCheck)), regT0);
jump(regT0);
Label virtualConstructBegin = align();
constructSlowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
constructSlowCase.append(emitJumpIfNotType(regT0, regT1, JSFunctionType));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT1);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
Jump hasCodeBlock2 = branch32(GreaterThanOrEqual, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParametersForConstruct)), TrustedImm32(0));
preserveReturnAddressAfterCall(regT3);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callCompileConstruct = call();
restoreReturnAddressBeforeReturn(regT3);
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
hasCodeBlock2.link(this);
loadPtr(Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_jitCodeForConstructWithArityCheck)), regT0);
jump(regT0);
callSlowCase.link(this);
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT2, regT2);
emitPutCellToCallFrameHeader(regT2, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3);
emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
emitPutImmediateToCallFrameHeader(0, RegisterFile::CodeBlock);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callCallNotJSFunction = call();
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
restoreReturnAddressBeforeReturn(regT3);
ret();
constructSlowCase.link(this);
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT2, regT2);
emitPutCellToCallFrameHeader(regT2, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3);
emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
emitPutImmediateToCallFrameHeader(0, RegisterFile::CodeBlock);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
restoreArgumentReference();
Call callConstructNotJSFunction = call();
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
restoreReturnAddressBeforeReturn(regT3);
ret();
Label nativeCallThunk = privateCompileCTINativeCall(globalData);
Label nativeConstructThunk = privateCompileCTINativeCall(globalData, true);
Call string_failureCases1Call = makeTailRecursiveCall(string_failureCases1);
Call string_failureCases2Call = makeTailRecursiveCall(string_failureCases2);
Call string_failureCases3Call = makeTailRecursiveCall(string_failureCases3);
LinkBuffer patchBuffer(*m_globalData, this, GLOBAL_THUNK_ID);
patchBuffer.link(string_failureCases1Call, FunctionPtr(cti_op_get_by_id_string_fail));
patchBuffer.link(string_failureCases2Call, FunctionPtr(cti_op_get_by_id_string_fail));
patchBuffer.link(string_failureCases3Call, FunctionPtr(cti_op_get_by_id_string_fail));
patchBuffer.link(callLazyLinkCall, FunctionPtr(cti_vm_lazyLinkCall));
patchBuffer.link(callLazyLinkConstruct, FunctionPtr(cti_vm_lazyLinkConstruct));
patchBuffer.link(callCompileCall, FunctionPtr(cti_op_call_jitCompile));
patchBuffer.link(callCompileConstruct, FunctionPtr(cti_op_construct_jitCompile));
patchBuffer.link(callCallNotJSFunction, FunctionPtr(cti_op_call_NotJSFunction));
patchBuffer.link(callConstructNotJSFunction, FunctionPtr(cti_op_construct_NotJSConstruct));
CodeRef finalCode = patchBuffer.finalizeCode();
RefPtr<ExecutableMemoryHandle> executableMemory = finalCode.executableMemory();
trampolines->ctiVirtualCallLink = patchBuffer.trampolineAt(virtualCallLinkBegin);
trampolines->ctiVirtualConstructLink = patchBuffer.trampolineAt(virtualConstructLinkBegin);
trampolines->ctiVirtualCall = patchBuffer.trampolineAt(virtualCallBegin);
trampolines->ctiVirtualConstruct = patchBuffer.trampolineAt(virtualConstructBegin);
trampolines->ctiNativeCall = patchBuffer.trampolineAt(nativeCallThunk);
trampolines->ctiNativeConstruct = patchBuffer.trampolineAt(nativeConstructThunk);
trampolines->ctiStringLengthTrampoline = patchBuffer.trampolineAt(stringLengthBegin);
return executableMemory.release();
}
JIT::Label JIT::privateCompileCTINativeCall(JSGlobalData* globalData, bool isConstruct)
{
int executableOffsetToFunction = isConstruct ? OBJECT_OFFSETOF(NativeExecutable, m_constructor) : OBJECT_OFFSETOF(NativeExecutable, m_function);
Label nativeCallThunk = align();
emitPutImmediateToCallFrameHeader(0, RegisterFile::CodeBlock);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
#if CPU(X86)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT0);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT0);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
peek(regT1);
emitPutToCallFrameHeader(regT1, RegisterFile::ReturnPC);
move(callFrameRegister, X86Registers::ecx);
subPtr(TrustedImm32(16 - sizeof(void*)), stackPointerRegister);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT1);
loadPtr(Address(regT1, OBJECT_OFFSETOF(JSFunction, m_executable)), regT1);
move(regT0, callFrameRegister); call(Address(regT1, executableOffsetToFunction));
addPtr(TrustedImm32(16 - sizeof(void*)), stackPointerRegister);
#elif CPU(ARM)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT2);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
move(callFrameRegister, ARMRegisters::r0);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, ARMRegisters::r1);
move(regT2, callFrameRegister); loadPtr(Address(ARMRegisters::r1, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
call(Address(regT2, executableOffsetToFunction));
restoreReturnAddressBeforeReturn(regT3);
#elif CPU(SH4)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT2);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
move(callFrameRegister, regT4);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT5);
move(regT2, callFrameRegister); loadPtr(Address(regT5, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
call(Address(regT2, executableOffsetToFunction), regT0);
restoreReturnAddressBeforeReturn(regT3);
#elif CPU(MIPS)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT0);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT0);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
subPtr(TrustedImm32(16), stackPointerRegister);
move(callFrameRegister, MIPSRegisters::a0);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, MIPSRegisters::a2);
loadPtr(Address(MIPSRegisters::a2, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
move(regT0, callFrameRegister); call(Address(regT2, executableOffsetToFunction));
addPtr(TrustedImm32(16), stackPointerRegister);
restoreReturnAddressBeforeReturn(regT3);
#else
#error "JIT not supported on this platform."
UNUSED_PARAM(executableOffsetToFunction);
breakpoint();
#endif // CPU(X86)
Jump sawException = branch32(NotEqual, AbsoluteAddress(reinterpret_cast<char*>(&globalData->exception) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
ret();
sawException.link(this);
preserveReturnAddressAfterCall(regT1);
move(TrustedImmPtr(&globalData->exceptionLocation), regT2);
storePtr(regT1, regT2);
poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*));
storePtr(callFrameRegister, &m_globalData->topCallFrame);
move(TrustedImmPtr(FunctionPtr(ctiVMThrowTrampoline).value()), regT1);
restoreReturnAddressBeforeReturn(regT1);
ret();
return nativeCallThunk;
}
JIT::CodeRef JIT::privateCompileCTINativeCall(JSGlobalData* globalData, NativeFunction func)
{
Call nativeCall;
emitPutImmediateToCallFrameHeader(0, RegisterFile::CodeBlock);
storePtr(callFrameRegister, &m_globalData->topCallFrame);
#if CPU(X86)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT0);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT0);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
peek(regT1);
emitPutToCallFrameHeader(regT1, RegisterFile::ReturnPC);
move(callFrameRegister, X86Registers::ecx);
subPtr(TrustedImm32(16 - sizeof(void*)), stackPointerRegister);
move(regT0, callFrameRegister);
nativeCall = call();
addPtr(TrustedImm32(16 - sizeof(void*)), stackPointerRegister);
#elif CPU(ARM)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT2);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
move(callFrameRegister, ARMRegisters::r0);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, ARMRegisters::r1);
move(regT2, callFrameRegister); loadPtr(Address(ARMRegisters::r1, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
nativeCall = call();
restoreReturnAddressBeforeReturn(regT3);
#elif CPU(MIPS)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT0);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT0);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
subPtr(TrustedImm32(16), stackPointerRegister);
move(callFrameRegister, MIPSRegisters::a0);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, MIPSRegisters::a2);
loadPtr(Address(MIPSRegisters::a2, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
move(regT0, callFrameRegister);
nativeCall = call();
addPtr(TrustedImm32(16), stackPointerRegister);
restoreReturnAddressBeforeReturn(regT3);
#elif CPU(SH4)
emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT2);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT2);
emitPutCellToCallFrameHeader(regT1, RegisterFile::ScopeChain);
preserveReturnAddressAfterCall(regT3); emitPutToCallFrameHeader(regT3, RegisterFile::ReturnPC);
move(callFrameRegister, regT4);
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT5);
move(regT2, callFrameRegister); loadPtr(Address(regT5, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
nativeCall = call();
restoreReturnAddressBeforeReturn(regT3);
#else
#error "JIT not supported on this platform."
breakpoint();
#endif // CPU(X86)
Jump sawException = branch32(NotEqual, AbsoluteAddress(reinterpret_cast<char*>(&globalData->exception) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
ret();
sawException.link(this);
preserveReturnAddressAfterCall(regT1);
move(TrustedImmPtr(&globalData->exceptionLocation), regT2);
storePtr(regT1, regT2);
poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*));
storePtr(callFrameRegister, &m_globalData->topCallFrame);
move(TrustedImmPtr(FunctionPtr(ctiVMThrowTrampoline).value()), regT1);
restoreReturnAddressBeforeReturn(regT1);
ret();
LinkBuffer patchBuffer(*m_globalData, this, GLOBAL_THUNK_ID);
patchBuffer.link(nativeCall, FunctionPtr(func));
return patchBuffer.finalizeCode();
}
void JIT::emit_op_mov(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src = currentInstruction[2].u.operand;
if (m_codeBlock->isConstantRegisterIndex(src))
emitStore(dst, getConstantOperand(src));
else {
emitLoad(src, regT1, regT0);
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_mov), dst, regT1, regT0);
}
}
void JIT::emit_op_end(Instruction* currentInstruction)
{
ASSERT(returnValueRegister != callFrameRegister);
emitLoad(currentInstruction[1].u.operand, regT1, regT0);
restoreReturnAddressBeforeReturn(Address(callFrameRegister, RegisterFile::ReturnPC * static_cast<int>(sizeof(Register))));
ret();
}
void JIT::emit_op_jmp(Instruction* currentInstruction)
{
unsigned target = currentInstruction[1].u.operand;
addJump(jump(), target);
}
void JIT::emit_op_new_object(Instruction* currentInstruction)
{
emitAllocateJSFinalObject(TrustedImmPtr(m_codeBlock->globalObject()->emptyObjectStructure()), regT0, regT1);
emitStoreCell(currentInstruction[1].u.operand, regT0);
}
void JIT::emitSlow_op_new_object(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkSlowCase(iter);
JITStubCall(this, cti_op_new_object).call(currentInstruction[1].u.operand);
}
void JIT::emit_op_check_has_instance(Instruction* currentInstruction)
{
unsigned baseVal = currentInstruction[1].u.operand;
emitLoadPayload(baseVal, regT0);
emitJumpSlowCaseIfNotJSCell(baseVal);
loadPtr(Address(regT0, JSCell::structureOffset()), regT0);
addSlowCase(branchTest8(Zero, Address(regT0, Structure::typeInfoFlagsOffset()), TrustedImm32(ImplementsHasInstance)));
}
void JIT::emit_op_instanceof(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
unsigned baseVal = currentInstruction[3].u.operand;
unsigned proto = currentInstruction[4].u.operand;
emitLoadPayload(value, regT2);
emitLoadPayload(baseVal, regT0);
emitLoadPayload(proto, regT1);
emitJumpSlowCaseIfNotJSCell(value);
emitJumpSlowCaseIfNotJSCell(proto);
loadPtr(Address(regT1, JSCell::structureOffset()), regT3);
addSlowCase(emitJumpIfNotObject(regT3));
loadPtr(Address(regT0, JSCell::structureOffset()), regT0);
addSlowCase(branchTest8(Zero, Address(regT0, Structure::typeInfoFlagsOffset()), TrustedImm32(ImplementsDefaultHasInstance)));
move(TrustedImm32(1), regT0);
Label loop(this);
loadPtr(Address(regT2, JSCell::structureOffset()), regT2);
load32(Address(regT2, Structure::prototypeOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
Jump isInstance = branchPtr(Equal, regT2, regT1);
branchTest32(NonZero, regT2).linkTo(loop, this);
move(TrustedImm32(0), regT0);
isInstance.link(this);
emitStoreBool(dst, regT0);
}
void JIT::emitSlow_op_check_has_instance(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned baseVal = currentInstruction[1].u.operand;
linkSlowCaseIfNotJSCell(iter, baseVal);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_check_has_instance);
stubCall.addArgument(baseVal);
stubCall.call();
}
void JIT::emitSlow_op_instanceof(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
unsigned baseVal = currentInstruction[3].u.operand;
unsigned proto = currentInstruction[4].u.operand;
linkSlowCaseIfNotJSCell(iter, value);
linkSlowCaseIfNotJSCell(iter, proto);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_instanceof);
stubCall.addArgument(value);
stubCall.addArgument(baseVal);
stubCall.addArgument(proto);
stubCall.call(dst);
}
void JIT::emit_op_is_undefined(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
emitLoad(value, regT1, regT0);
Jump isCell = branch32(Equal, regT1, TrustedImm32(JSValue::CellTag));
compare32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag), regT0);
Jump done = jump();
isCell.link(this);
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
test8(NonZero, Address(regT1, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined), regT0);
done.link(this);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_is_boolean(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
emitLoadTag(value, regT0);
compare32(Equal, regT0, TrustedImm32(JSValue::BooleanTag), regT0);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_is_number(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
emitLoadTag(value, regT0);
add32(TrustedImm32(1), regT0);
compare32(Below, regT0, TrustedImm32(JSValue::LowestTag + 1), regT0);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_is_string(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned value = currentInstruction[2].u.operand;
emitLoad(value, regT1, regT0);
Jump isNotCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
compare8(Equal, Address(regT1, Structure::typeInfoTypeOffset()), TrustedImm32(StringType), regT0);
Jump done = jump();
isNotCell.link(this);
move(TrustedImm32(0), regT0);
done.link(this);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_tear_off_activation(Instruction* currentInstruction)
{
unsigned activation = currentInstruction[1].u.operand;
unsigned arguments = currentInstruction[2].u.operand;
Jump activationCreated = branch32(NotEqual, tagFor(activation), TrustedImm32(JSValue::EmptyValueTag));
Jump argumentsNotCreated = branch32(Equal, tagFor(arguments), TrustedImm32(JSValue::EmptyValueTag));
activationCreated.link(this);
JITStubCall stubCall(this, cti_op_tear_off_activation);
stubCall.addArgument(currentInstruction[1].u.operand);
stubCall.addArgument(unmodifiedArgumentsRegister(currentInstruction[2].u.operand));
stubCall.call();
argumentsNotCreated.link(this);
}
void JIT::emit_op_tear_off_arguments(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
Jump argsNotCreated = branch32(Equal, tagFor(unmodifiedArgumentsRegister(dst)), TrustedImm32(JSValue::EmptyValueTag));
JITStubCall stubCall(this, cti_op_tear_off_arguments);
stubCall.addArgument(unmodifiedArgumentsRegister(dst));
stubCall.call();
argsNotCreated.link(this);
}
void JIT::emit_op_resolve(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_resolve);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.callWithValueProfiling(currentInstruction[1].u.operand);
}
void JIT::emit_op_to_primitive(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isImm = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
isImm.link(this);
if (dst != src)
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_to_primitive), dst, regT1, regT0);
}
void JIT::emitSlow_op_to_primitive(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int dst = currentInstruction[1].u.operand;
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_to_primitive);
stubCall.addArgument(regT1, regT0);
stubCall.call(dst);
}
void JIT::emit_op_strcat(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_strcat);
stubCall.addArgument(TrustedImm32(currentInstruction[2].u.operand));
stubCall.addArgument(TrustedImm32(currentInstruction[3].u.operand));
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_resolve_base(Instruction* currentInstruction)
{
JITStubCall stubCall(this, currentInstruction[3].u.operand ? cti_op_resolve_base_strict_put : cti_op_resolve_base);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.callWithValueProfiling(currentInstruction[1].u.operand);
}
void JIT::emit_op_ensure_property_exists(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_ensure_property_exists);
stubCall.addArgument(TrustedImm32(currentInstruction[1].u.operand));
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_resolve_skip(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_resolve_skip);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(TrustedImm32(currentInstruction[3].u.operand));
stubCall.callWithValueProfiling(currentInstruction[1].u.operand);
}
void JIT::emit_op_resolve_global(Instruction* currentInstruction, bool dynamic)
{
unsigned dst = currentInstruction[1].u.operand;
void* globalObject = m_codeBlock->globalObject();
unsigned currentIndex = m_globalResolveInfoIndex++;
GlobalResolveInfo* resolveInfoAddress = &m_codeBlock->globalResolveInfo(currentIndex);
move(TrustedImmPtr(globalObject), regT0);
move(TrustedImmPtr(resolveInfoAddress), regT3);
loadPtr(Address(regT3, OBJECT_OFFSETOF(GlobalResolveInfo, structure)), regT1);
addSlowCase(branchPtr(NotEqual, regT1, Address(regT0, JSCell::structureOffset())));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSGlobalObject, m_propertyStorage)), regT2);
load32(Address(regT3, OBJECT_OFFSETOF(GlobalResolveInfo, offset)), regT3);
load32(BaseIndex(regT2, regT3, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); load32(BaseIndex(regT2, regT3, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); emitValueProfilingSite();
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + (dynamic ? OPCODE_LENGTH(op_resolve_global_dynamic) : OPCODE_LENGTH(op_resolve_global)), dst, regT1, regT0);
}
void JIT::emitSlow_op_resolve_global(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
Identifier* ident = &m_codeBlock->identifier(currentInstruction[2].u.operand);
unsigned currentIndex = m_globalResolveInfoIndex++;
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_resolve_global);
stubCall.addArgument(TrustedImmPtr(ident));
stubCall.addArgument(TrustedImm32(currentIndex));
stubCall.callWithValueProfiling(dst);
}
void JIT::emit_op_not(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src = currentInstruction[2].u.operand;
emitLoadTag(src, regT0);
emitLoad(src, regT1, regT0);
addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::BooleanTag)));
xor32(TrustedImm32(1), regT0);
emitStoreBool(dst, regT0, (dst == src));
}
void JIT::emitSlow_op_not(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src = currentInstruction[2].u.operand;
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_not);
stubCall.addArgument(src);
stubCall.call(dst);
}
void JIT::emit_op_jfalse(Instruction* currentInstruction)
{
unsigned cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(cond, regT1, regT0);
ASSERT((JSValue::BooleanTag + 1 == JSValue::Int32Tag) && !(JSValue::Int32Tag + 1));
addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::BooleanTag)));
addJump(branchTest32(Zero, regT0), target);
}
void JIT::emitSlow_op_jfalse(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
linkSlowCase(iter);
if (supportsFloatingPoint()) {
Jump notNumber = branch32(Above, regT1, TrustedImm32(JSValue::LowestTag));
emitLoadDouble(cond, fpRegT0);
emitJumpSlowToHot(branchDoubleZeroOrNaN(fpRegT0, fpRegT1), target);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jfalse));
notNumber.link(this);
}
JITStubCall stubCall(this, cti_op_jtrue);
stubCall.addArgument(cond);
stubCall.call();
emitJumpSlowToHot(branchTest32(Zero, regT0), target); }
void JIT::emit_op_jtrue(Instruction* currentInstruction)
{
unsigned cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(cond, regT1, regT0);
ASSERT((JSValue::BooleanTag + 1 == JSValue::Int32Tag) && !(JSValue::Int32Tag + 1));
addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::BooleanTag)));
addJump(branchTest32(NonZero, regT0), target);
}
void JIT::emitSlow_op_jtrue(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
linkSlowCase(iter);
if (supportsFloatingPoint()) {
Jump notNumber = branch32(Above, regT1, TrustedImm32(JSValue::LowestTag));
emitLoadDouble(cond, fpRegT0);
emitJumpSlowToHot(branchDoubleNonZero(fpRegT0, fpRegT1), target);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jtrue));
notNumber.link(this);
}
JITStubCall stubCall(this, cti_op_jtrue);
stubCall.addArgument(cond);
stubCall.call();
emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
}
void JIT::emit_op_jeq_null(Instruction* currentInstruction)
{
unsigned src = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
addJump(branchTest8(NonZero, Address(regT2, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined)), target);
Jump wasNotImmediate = jump();
isImmediate.link(this);
ASSERT((JSValue::UndefinedTag + 1 == JSValue::NullTag) && (JSValue::NullTag & 0x1));
or32(TrustedImm32(1), regT1);
addJump(branch32(Equal, regT1, TrustedImm32(JSValue::NullTag)), target);
wasNotImmediate.link(this);
}
void JIT::emit_op_jneq_null(Instruction* currentInstruction)
{
unsigned src = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
addJump(branchTest8(Zero, Address(regT2, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined)), target);
Jump wasNotImmediate = jump();
isImmediate.link(this);
ASSERT((JSValue::UndefinedTag + 1 == JSValue::NullTag) && (JSValue::NullTag & 0x1));
or32(TrustedImm32(1), regT1);
addJump(branch32(NotEqual, regT1, TrustedImm32(JSValue::NullTag)), target);
wasNotImmediate.link(this);
}
void JIT::emit_op_jneq_ptr(Instruction* currentInstruction)
{
unsigned src = currentInstruction[1].u.operand;
JSCell* ptr = currentInstruction[2].u.jsCell.get();
unsigned target = currentInstruction[3].u.operand;
emitLoad(src, regT1, regT0);
addJump(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)), target);
addJump(branchPtr(NotEqual, regT0, TrustedImmPtr(ptr)), target);
}
void JIT::emit_op_eq(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src1 = currentInstruction[2].u.operand;
unsigned src2 = currentInstruction[3].u.operand;
emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
addSlowCase(branch32(NotEqual, regT1, regT3));
addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::CellTag)));
addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
compare32(Equal, regT0, regT2, regT0);
emitStoreBool(dst, regT0);
}
void JIT::emitSlow_op_eq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned op1 = currentInstruction[2].u.operand;
unsigned op2 = currentInstruction[3].u.operand;
JumpList storeResult;
JumpList genericCase;
genericCase.append(getSlowCase(iter));
linkSlowCase(iter); genericCase.append(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
genericCase.append(branchPtr(NotEqual, Address(regT2, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
JITStubCall stubCallEqStrings(this, cti_op_eq_strings);
stubCallEqStrings.addArgument(regT0);
stubCallEqStrings.addArgument(regT2);
stubCallEqStrings.call();
storeResult.append(jump());
genericCase.append(getSlowCase(iter)); genericCase.link(this);
JITStubCall stubCallEq(this, cti_op_eq);
stubCallEq.addArgument(op1);
stubCallEq.addArgument(op2);
stubCallEq.call(regT0);
storeResult.link(this);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_neq(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src1 = currentInstruction[2].u.operand;
unsigned src2 = currentInstruction[3].u.operand;
emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
addSlowCase(branch32(NotEqual, regT1, regT3));
addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::CellTag)));
addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
compare32(NotEqual, regT0, regT2, regT0);
emitStoreBool(dst, regT0);
}
void JIT::emitSlow_op_neq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
JumpList storeResult;
JumpList genericCase;
genericCase.append(getSlowCase(iter));
linkSlowCase(iter); genericCase.append(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
genericCase.append(branchPtr(NotEqual, Address(regT2, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
JITStubCall stubCallEqStrings(this, cti_op_eq_strings);
stubCallEqStrings.addArgument(regT0);
stubCallEqStrings.addArgument(regT2);
stubCallEqStrings.call(regT0);
storeResult.append(jump());
genericCase.append(getSlowCase(iter)); genericCase.link(this);
JITStubCall stubCallEq(this, cti_op_eq);
stubCallEq.addArgument(regT1, regT0);
stubCallEq.addArgument(regT3, regT2);
stubCallEq.call(regT0);
storeResult.link(this);
xor32(TrustedImm32(0x1), regT0);
emitStoreBool(dst, regT0);
}
void JIT::compileOpStrictEq(Instruction* currentInstruction, CompileOpStrictEqType type)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src1 = currentInstruction[2].u.operand;
unsigned src2 = currentInstruction[3].u.operand;
emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
addSlowCase(branch32(NotEqual, regT1, regT3));
addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
Jump notCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
Jump firstNotString = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info));
addSlowCase(branchPtr(Equal, Address(regT2, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
notCell.link(this);
firstNotString.link(this);
if (type == OpStrictEq)
compare32(Equal, regT0, regT2, regT0);
else
compare32(NotEqual, regT0, regT2, regT0);
emitStoreBool(dst, regT0);
}
void JIT::emit_op_stricteq(Instruction* currentInstruction)
{
compileOpStrictEq(currentInstruction, OpStrictEq);
}
void JIT::emitSlow_op_stricteq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src1 = currentInstruction[2].u.operand;
unsigned src2 = currentInstruction[3].u.operand;
linkSlowCase(iter);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_stricteq);
stubCall.addArgument(src1);
stubCall.addArgument(src2);
stubCall.call(dst);
}
void JIT::emit_op_nstricteq(Instruction* currentInstruction)
{
compileOpStrictEq(currentInstruction, OpNStrictEq);
}
void JIT::emitSlow_op_nstricteq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src1 = currentInstruction[2].u.operand;
unsigned src2 = currentInstruction[3].u.operand;
linkSlowCase(iter);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_nstricteq);
stubCall.addArgument(src1);
stubCall.addArgument(src2);
stubCall.call(dst);
}
void JIT::emit_op_eq_null(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
test8(NonZero, Address(regT1, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined), regT1);
Jump wasNotImmediate = jump();
isImmediate.link(this);
compare32(Equal, regT1, TrustedImm32(JSValue::NullTag), regT2);
compare32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag), regT1);
or32(regT2, regT1);
wasNotImmediate.link(this);
emitStoreBool(dst, regT1);
}
void JIT::emit_op_neq_null(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
test8(Zero, Address(regT1, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined), regT1);
Jump wasNotImmediate = jump();
isImmediate.link(this);
compare32(NotEqual, regT1, TrustedImm32(JSValue::NullTag), regT2);
compare32(NotEqual, regT1, TrustedImm32(JSValue::UndefinedTag), regT1);
and32(regT2, regT1);
wasNotImmediate.link(this);
emitStoreBool(dst, regT1);
}
void JIT::emit_op_resolve_with_base(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_resolve_with_base);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
stubCall.addArgument(TrustedImm32(currentInstruction[1].u.operand));
stubCall.callWithValueProfiling(currentInstruction[2].u.operand);
}
void JIT::emit_op_resolve_with_this(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_resolve_with_this);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
stubCall.addArgument(TrustedImm32(currentInstruction[1].u.operand));
stubCall.callWithValueProfiling(currentInstruction[2].u.operand);
}
void JIT::emit_op_throw(Instruction* currentInstruction)
{
unsigned exception = currentInstruction[1].u.operand;
JITStubCall stubCall(this, cti_op_throw);
stubCall.addArgument(exception);
stubCall.call();
#ifndef NDEBUG
breakpoint();
#endif
}
void JIT::emit_op_get_pnames(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int i = currentInstruction[3].u.operand;
int size = currentInstruction[4].u.operand;
int breakTarget = currentInstruction[5].u.operand;
JumpList isNotObject;
emitLoad(base, regT1, regT0);
if (!m_codeBlock->isKnownNotImmediate(base))
isNotObject.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
if (base != m_codeBlock->thisRegister() || m_codeBlock->isStrictMode()) {
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
isNotObject.append(emitJumpIfNotObject(regT2));
}
Label isObject(this);
JITStubCall getPnamesStubCall(this, cti_op_get_pnames);
getPnamesStubCall.addArgument(regT0);
getPnamesStubCall.call(dst);
load32(Address(regT0, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStringsSize)), regT3);
store32(TrustedImm32(Int32Tag), intTagFor(i));
store32(TrustedImm32(0), intPayloadFor(i));
store32(TrustedImm32(Int32Tag), intTagFor(size));
store32(regT3, payloadFor(size));
Jump end = jump();
isNotObject.link(this);
addJump(branch32(Equal, regT1, TrustedImm32(JSValue::NullTag)), breakTarget);
addJump(branch32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag)), breakTarget);
JITStubCall toObjectStubCall(this, cti_to_object);
toObjectStubCall.addArgument(regT1, regT0);
toObjectStubCall.call(base);
jump().linkTo(isObject, this);
end.link(this);
}
void JIT::emit_op_next_pname(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int i = currentInstruction[3].u.operand;
int size = currentInstruction[4].u.operand;
int it = currentInstruction[5].u.operand;
int target = currentInstruction[6].u.operand;
JumpList callHasProperty;
Label begin(this);
load32(intPayloadFor(i), regT0);
Jump end = branch32(Equal, regT0, intPayloadFor(size));
loadPtr(payloadFor(it), regT1);
loadPtr(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStrings)), regT2);
load32(BaseIndex(regT2, regT0, TimesEight), regT2);
store32(TrustedImm32(JSValue::CellTag), tagFor(dst));
store32(regT2, payloadFor(dst));
add32(TrustedImm32(1), regT0);
store32(regT0, intPayloadFor(i));
loadPtr(payloadFor(base), regT0);
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
callHasProperty.append(branchPtr(NotEqual, regT2, Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure)))));
loadPtr(Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedPrototypeChain))), regT3);
loadPtr(Address(regT3, OBJECT_OFFSETOF(StructureChain, m_vector)), regT3);
addJump(branchTestPtr(Zero, Address(regT3)), target);
Label checkPrototype(this);
callHasProperty.append(branch32(Equal, Address(regT2, Structure::prototypeOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::NullTag)));
loadPtr(Address(regT2, Structure::prototypeOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
loadPtr(Address(regT2, JSCell::structureOffset()), regT2);
callHasProperty.append(branchPtr(NotEqual, regT2, Address(regT3)));
addPtr(TrustedImm32(sizeof(Structure*)), regT3);
branchTestPtr(NonZero, Address(regT3)).linkTo(checkPrototype, this);
addJump(jump(), target);
callHasProperty.link(this);
loadPtr(addressFor(dst), regT1);
JITStubCall stubCall(this, cti_has_property);
stubCall.addArgument(regT0);
stubCall.addArgument(regT1);
stubCall.call();
addJump(branchTest32(NonZero, regT0), target);
jump().linkTo(begin, this);
end.link(this);
}
void JIT::emit_op_push_scope(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_push_scope);
stubCall.addArgument(currentInstruction[1].u.operand);
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_pop_scope(Instruction*)
{
JITStubCall(this, cti_op_pop_scope).call();
}
void JIT::emit_op_to_jsnumber(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
Jump isInt32 = branch32(Equal, regT1, TrustedImm32(JSValue::Int32Tag));
addSlowCase(branch32(AboveOrEqual, regT1, TrustedImm32(JSValue::EmptyValueTag)));
isInt32.link(this);
if (src != dst)
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_to_jsnumber), dst, regT1, regT0);
}
void JIT::emitSlow_op_to_jsnumber(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int dst = currentInstruction[1].u.operand;
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_to_jsnumber);
stubCall.addArgument(regT1, regT0);
stubCall.call(dst);
}
void JIT::emit_op_push_new_scope(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_push_new_scope);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(currentInstruction[3].u.operand);
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_catch(Instruction* currentInstruction)
{
move(regT0, callFrameRegister);
loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(struct JITStackFrame, globalData)), regT3);
load32(Address(regT3, OBJECT_OFFSETOF(JSGlobalData, exception) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
load32(Address(regT3, OBJECT_OFFSETOF(JSGlobalData, exception) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
store32(TrustedImm32(JSValue().payload()), Address(regT3, OBJECT_OFFSETOF(JSGlobalData, exception) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
store32(TrustedImm32(JSValue().tag()), Address(regT3, OBJECT_OFFSETOF(JSGlobalData, exception) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
unsigned exception = currentInstruction[1].u.operand;
emitStore(exception, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_catch), exception, regT1, regT0);
}
void JIT::emit_op_jmp_scopes(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_jmp_scopes);
stubCall.addArgument(TrustedImm32(currentInstruction[1].u.operand));
stubCall.call();
addJump(jump(), currentInstruction[2].u.operand);
}
void JIT::emit_op_switch_imm(Instruction* currentInstruction)
{
unsigned tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
SimpleJumpTable* jumpTable = &m_codeBlock->immediateSwitchJumpTable(tableIndex);
m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset, SwitchRecord::Immediate));
jumpTable->ctiOffsets.grow(jumpTable->branchOffsets.size());
JITStubCall stubCall(this, cti_op_switch_imm);
stubCall.addArgument(scrutinee);
stubCall.addArgument(TrustedImm32(tableIndex));
stubCall.call();
jump(regT0);
}
void JIT::emit_op_switch_char(Instruction* currentInstruction)
{
unsigned tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
SimpleJumpTable* jumpTable = &m_codeBlock->characterSwitchJumpTable(tableIndex);
m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset, SwitchRecord::Character));
jumpTable->ctiOffsets.grow(jumpTable->branchOffsets.size());
JITStubCall stubCall(this, cti_op_switch_char);
stubCall.addArgument(scrutinee);
stubCall.addArgument(TrustedImm32(tableIndex));
stubCall.call();
jump(regT0);
}
void JIT::emit_op_switch_string(Instruction* currentInstruction)
{
unsigned tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
StringJumpTable* jumpTable = &m_codeBlock->stringSwitchJumpTable(tableIndex);
m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset));
JITStubCall stubCall(this, cti_op_switch_string);
stubCall.addArgument(scrutinee);
stubCall.addArgument(TrustedImm32(tableIndex));
stubCall.call();
jump(regT0);
}
void JIT::emit_op_throw_reference_error(Instruction* currentInstruction)
{
unsigned message = currentInstruction[1].u.operand;
JITStubCall stubCall(this, cti_op_throw_reference_error);
stubCall.addArgument(m_codeBlock->getConstant(message));
stubCall.call();
}
void JIT::emit_op_debug(Instruction* currentInstruction)
{
#if ENABLE(DEBUG_WITH_BREAKPOINT)
UNUSED_PARAM(currentInstruction);
breakpoint();
#else
JITStubCall stubCall(this, cti_op_debug);
stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
stubCall.addArgument(Imm32(currentInstruction[3].u.operand));
stubCall.call();
#endif
}
void JIT::emit_op_enter(Instruction*)
{
for (int i = 0; i < m_codeBlock->m_numVars; ++i)
emitStore(i, jsUndefined());
}
void JIT::emit_op_create_activation(Instruction* currentInstruction)
{
unsigned activation = currentInstruction[1].u.operand;
Jump activationCreated = branch32(NotEqual, tagFor(activation), TrustedImm32(JSValue::EmptyValueTag));
JITStubCall(this, cti_op_push_activation).call(activation);
activationCreated.link(this);
}
void JIT::emit_op_create_arguments(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
Jump argsCreated = branch32(NotEqual, tagFor(dst), TrustedImm32(JSValue::EmptyValueTag));
JITStubCall(this, cti_op_create_arguments).call();
emitStore(dst, regT1, regT0);
emitStore(unmodifiedArgumentsRegister(dst), regT1, regT0);
argsCreated.link(this);
}
void JIT::emit_op_init_lazy_reg(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
emitStore(dst, JSValue());
}
void JIT::emit_op_get_callee(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT0);
emitStoreCell(dst, regT0);
}
void JIT::emit_op_create_this(Instruction* currentInstruction)
{
emitLoad(currentInstruction[2].u.operand, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(currentInstruction[2].u.operand, regT1);
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
addSlowCase(emitJumpIfNotObject(regT1));
loadPtr(Address(regT0, JSObject::offsetOfInheritorID()), regT2);
addSlowCase(branchTestPtr(Zero, regT2));
emitAllocateJSFinalObject(regT2, regT0, regT1);
emitStoreCell(currentInstruction[1].u.operand, regT0);
}
void JIT::emitSlow_op_create_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkSlowCaseIfNotJSCell(iter, currentInstruction[2].u.operand); linkSlowCase(iter); linkSlowCase(iter); linkSlowCase(iter); unsigned protoRegister = currentInstruction[2].u.operand;
emitLoad(protoRegister, regT1, regT0);
JITStubCall stubCall(this, cti_op_create_this);
stubCall.addArgument(regT1, regT0);
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_convert_this(Instruction* currentInstruction)
{
unsigned thisRegister = currentInstruction[1].u.operand;
emitLoad(thisRegister, regT1, regT0);
addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
addSlowCase(branchPtr(Equal, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
map(m_bytecodeOffset + OPCODE_LENGTH(op_convert_this), thisRegister, regT1, regT0);
}
void JIT::emitSlow_op_convert_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
void* globalThis = m_codeBlock->globalObject()->globalScopeChain()->globalThis.get();
unsigned thisRegister = currentInstruction[1].u.operand;
linkSlowCase(iter);
Jump isNotUndefined = branch32(NotEqual, regT1, TrustedImm32(JSValue::UndefinedTag));
move(TrustedImmPtr(globalThis), regT0);
move(TrustedImm32(JSValue::CellTag), regT1);
emitStore(thisRegister, regT1, regT0);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_convert_this));
isNotUndefined.link(this);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_convert_this);
stubCall.addArgument(regT1, regT0);
stubCall.call(thisRegister);
}
void JIT::emit_op_profile_will_call(Instruction* currentInstruction)
{
peek(regT2, OBJECT_OFFSETOF(JITStackFrame, enabledProfilerReference) / sizeof(void*));
Jump noProfiler = branchTestPtr(Zero, Address(regT2));
JITStubCall stubCall(this, cti_op_profile_will_call);
stubCall.addArgument(currentInstruction[1].u.operand);
stubCall.call();
noProfiler.link(this);
}
void JIT::emit_op_profile_did_call(Instruction* currentInstruction)
{
peek(regT2, OBJECT_OFFSETOF(JITStackFrame, enabledProfilerReference) / sizeof(void*));
Jump noProfiler = branchTestPtr(Zero, Address(regT2));
JITStubCall stubCall(this, cti_op_profile_did_call);
stubCall.addArgument(currentInstruction[1].u.operand);
stubCall.call();
noProfiler.link(this);
}
void JIT::emit_op_get_arguments_length(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int argumentsRegister = currentInstruction[2].u.operand;
addSlowCase(branch32(NotEqual, tagFor(argumentsRegister), TrustedImm32(JSValue::EmptyValueTag)));
load32(payloadFor(RegisterFile::ArgumentCount), regT0);
sub32(TrustedImm32(1), regT0);
emitStoreInt32(dst, regT0);
}
void JIT::emitSlow_op_get_arguments_length(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkSlowCase(iter);
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int ident = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_get_by_id_generic);
stubCall.addArgument(base);
stubCall.addArgument(TrustedImmPtr(&(m_codeBlock->identifier(ident))));
stubCall.call(dst);
}
void JIT::emit_op_get_argument_by_val(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int argumentsRegister = currentInstruction[2].u.operand;
int property = currentInstruction[3].u.operand;
addSlowCase(branch32(NotEqual, tagFor(argumentsRegister), TrustedImm32(JSValue::EmptyValueTag)));
emitLoad(property, regT1, regT2);
addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
add32(TrustedImm32(1), regT2);
load32(payloadFor(RegisterFile::ArgumentCount), regT3);
addSlowCase(branch32(AboveOrEqual, regT2, regT3));
neg32(regT2);
loadPtr(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))), regT0);
loadPtr(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))), regT1);
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_argument_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned arguments = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
linkSlowCase(iter);
Jump skipArgumentsCreation = jump();
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall(this, cti_op_create_arguments).call();
emitStore(arguments, regT1, regT0);
emitStore(unmodifiedArgumentsRegister(arguments), regT1, regT0);
skipArgumentsCreation.link(this);
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(arguments);
stubCall.addArgument(property);
stubCall.call(dst);
}
}
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)