/*
- * Copyright (C) 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2009, 2012, 2013, 2014 Apple Inc. All rights reserved.
* Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
*
* Redistribution and use in source and binary forms, with or without
*/
#include "config.h"
-#include "JIT.h"
-#if ENABLE(JIT) && USE(JSVALUE32_64)
+#if ENABLE(JIT)
+#if USE(JSVALUE32_64)
+#include "JIT.h"
-#include "JITInlineMethods.h"
-#include "JITStubCall.h"
+#include "CCallHelpers.h"
+#include "Debugger.h"
+#include "JITInlines.h"
#include "JSArray.h"
#include "JSCell.h"
#include "JSFunction.h"
#include "JSPropertyNameIterator.h"
+#include "JSVariableObject.h"
#include "LinkBuffer.h"
+#include "MaxFrameExtentForSlowPathCall.h"
+#include "SlowPathCall.h"
+#include "VirtualRegister.h"
namespace JSC {
-void JIT::privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executablePool, JSGlobalData* globalData, TrampolineStructure *trampolines)
+JIT::CodeRef JIT::privateCompileCTINativeCall(VM* vm, NativeFunction func)
{
-#if ENABLE(JIT_OPTIMIZE_MOD)
- Label softModBegin = align();
- softModulo();
-#endif
-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
- // (1) This function provides fast property access for string length
- Label stringLengthBegin = align();
-
- // regT0 holds payload, regT1 holds tag
-
- Jump string_failureCases1 = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
- Jump string_failureCases2 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr));
-
- // Checks out okay! - get the length from the Ustring.
- load32(Address(regT0, OBJECT_OFFSETOF(JSString, m_length)), regT2);
-
- Jump string_failureCases3 = branch32(Above, regT2, Imm32(INT_MAX));
- move(regT2, regT0);
- move(Imm32(JSValue::Int32Tag), regT1);
-
- ret();
-#endif
-
- // (2) Trampolines for the slow cases of op_call / op_call_eval / op_construct.
-
-#if ENABLE(JIT_OPTIMIZE_CALL)
- // VirtualCallLink Trampoline
- // regT0 holds callee, regT1 holds argCount. regT2 will hold the FunctionExecutable.
- Label virtualCallLinkBegin = align();
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
-
- Jump isNativeFunc2 = branch32(Equal, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), Imm32(0));
-
- Jump hasCodeBlock2 = branch32(GreaterThan, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), Imm32(0));
- preserveReturnAddressAfterCall(regT3);
- restoreArgumentReference();
- Call callJSFunction2 = call();
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
- emitGetJITStubArg(2, regT1); // argCount
- restoreReturnAddressBeforeReturn(regT3);
- hasCodeBlock2.link(this);
-
- // Check argCount matches callee arity.
- Jump arityCheckOkay2 = branch32(Equal, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), regT1);
- preserveReturnAddressAfterCall(regT3);
- emitPutJITStubArg(regT3, 1); // return address
- restoreArgumentReference();
- Call callArityCheck2 = call();
- move(regT1, callFrameRegister);
- emitGetJITStubArg(2, regT1); // argCount
- restoreReturnAddressBeforeReturn(regT3);
- arityCheckOkay2.link(this);
-
- isNativeFunc2.link(this);
-
- compileOpCallInitializeCallFrame();
-
- preserveReturnAddressAfterCall(regT3);
- emitPutJITStubArg(regT3, 1); // return address
- restoreArgumentReference();
- Call callLazyLinkCall = call();
- restoreReturnAddressBeforeReturn(regT3);
- jump(regT0);
-#endif // ENABLE(JIT_OPTIMIZE_CALL)
+ Call nativeCall;
- // VirtualCall Trampoline
- // regT0 holds callee, regT1 holds argCount. regT2 will hold the FunctionExecutable.
- Label virtualCallBegin = align();
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
-
- Jump isNativeFunc3 = branch32(Equal, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), Imm32(0));
-
- Jump hasCodeBlock3 = branch32(GreaterThan, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), Imm32(0));
- preserveReturnAddressAfterCall(regT3);
- restoreArgumentReference();
- Call callJSFunction1 = call();
- emitGetJITStubArg(2, regT1); // argCount
- restoreReturnAddressBeforeReturn(regT3);
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
- hasCodeBlock3.link(this);
-
- // Check argCount matches callee arity.
- Jump arityCheckOkay3 = branch32(Equal, Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_numParameters)), regT1);
- preserveReturnAddressAfterCall(regT3);
- emitPutJITStubArg(regT3, 1); // return address
- restoreArgumentReference();
- Call callArityCheck1 = call();
- move(regT1, callFrameRegister);
- emitGetJITStubArg(2, regT1); // argCount
- restoreReturnAddressBeforeReturn(regT3);
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
- arityCheckOkay3.link(this);
-
- isNativeFunc3.link(this);
-
- compileOpCallInitializeCallFrame();
- loadPtr(Address(regT2, OBJECT_OFFSETOF(FunctionExecutable, m_jitCode)), regT0);
- jump(regT0);
-
-#if CPU(X86) || CPU(ARM_TRADITIONAL)
- Label nativeCallThunk = align();
- preserveReturnAddressAfterCall(regT0);
- emitPutToCallFrameHeader(regT0, RegisterFile::ReturnPC); // Push return address
+ emitFunctionPrologue();
+ emitPutImmediateToCallFrameHeader(0, JSStack::CodeBlock);
+ storePtr(callFrameRegister, &m_vm->topCallFrame);
+#if CPU(X86)
// Load caller frame's scope chain into this callframe so that whatever we call can
// get to its global data.
- emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, regT1);
- emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1, regT1);
- emitPutToCallFrameHeader(regT1, RegisterFile::ScopeChain);
+ emitGetCallerFrameFromCallFrameHeaderPtr(regT0);
+ emitGetFromCallFrameHeaderPtr(JSStack::ScopeChain, regT1, regT0);
+ emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain);
-#if CPU(X86)
- emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
-
- /* We have two structs that we use to describe the stackframe we set up for our
- * call to native code. NativeCallFrameStructure describes the how we set up the stack
- * in advance of the call. NativeFunctionCalleeSignature describes the callframe
- * as the native code expects it. We do this as we are using the fastcall calling
- * convention which results in the callee popping its arguments off the stack, but
- * not the rest of the callframe so we need a nice way to ensure we increment the
- * stack pointer by the right amount after the call.
- */
-
-#if COMPILER(MSVC) || OS(LINUX)
-#if COMPILER(MSVC)
-#pragma pack(push)
-#pragma pack(4)
-#endif // COMPILER(MSVC)
- struct NativeCallFrameStructure {
- // CallFrame* callFrame; // passed in EDX
- JSObject* callee;
- JSValue thisValue;
- ArgList* argPointer;
- ArgList args;
- JSValue result;
- };
- struct NativeFunctionCalleeSignature {
- JSObject* callee;
- JSValue thisValue;
- ArgList* argPointer;
- };
-#if COMPILER(MSVC)
-#pragma pack(pop)
-#endif // COMPILER(MSVC)
-#else
- struct NativeCallFrameStructure {
- // CallFrame* callFrame; // passed in ECX
- // JSObject* callee; // passed in EDX
- JSValue thisValue;
- ArgList* argPointer;
- ArgList args;
- };
- struct NativeFunctionCalleeSignature {
- JSValue thisValue;
- ArgList* argPointer;
- };
-#endif
-
- const int NativeCallFrameSize = (sizeof(NativeCallFrameStructure) + 15) & ~15;
- // Allocate system stack frame
- subPtr(Imm32(NativeCallFrameSize), stackPointerRegister);
-
- // Set up arguments
- subPtr(Imm32(1), regT0); // Don't include 'this' in argcount
-
- // push argcount
- storePtr(regT0, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, args) + OBJECT_OFFSETOF(ArgList, m_argCount)));
-
- // Calculate the start of the callframe header, and store in regT1
- addPtr(Imm32(-RegisterFile::CallFrameHeaderSize * (int)sizeof(Register)), callFrameRegister, regT1);
+ // Calling convention: f(ecx, edx, ...);
+ // Host function signature: f(ExecState*);
+ move(callFrameRegister, X86Registers::ecx);
- // Calculate start of arguments as callframe header - sizeof(Register) * argcount (regT0)
- mul32(Imm32(sizeof(Register)), regT0, regT0);
- subPtr(regT0, regT1);
- storePtr(regT1, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, args) + OBJECT_OFFSETOF(ArgList, m_args)));
+ subPtr(TrustedImm32(8), stackPointerRegister); // Align stack for call.
+ storePtr(X86Registers::ecx, Address(stackPointerRegister));
- // ArgList is passed by reference so is stackPointerRegister + 4 * sizeof(Register)
- addPtr(Imm32(OBJECT_OFFSETOF(NativeCallFrameStructure, args)), stackPointerRegister, regT0);
- storePtr(regT0, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, argPointer)));
+ // call the function
+ nativeCall = call();
- // regT1 currently points to the first argument, regT1 - sizeof(Register) points to 'this'
- loadPtr(Address(regT1, -(int)sizeof(Register) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
- loadPtr(Address(regT1, -(int)sizeof(Register) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT3);
- storePtr(regT2, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, thisValue) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
- storePtr(regT3, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, thisValue) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
+ addPtr(TrustedImm32(8), stackPointerRegister);
-#if COMPILER(MSVC) || OS(LINUX)
- // ArgList is passed by reference so is stackPointerRegister + 4 * sizeof(Register)
- addPtr(Imm32(OBJECT_OFFSETOF(NativeCallFrameStructure, result)), stackPointerRegister, X86Registers::ecx);
+#elif CPU(ARM) || CPU(SH4) || CPU(MIPS)
+ // Load caller frame's scope chain into this callframe so that whatever we call can get to its global data.
+ emitGetCallerFrameFromCallFrameHeaderPtr(regT2);
+ emitGetFromCallFrameHeaderPtr(JSStack::ScopeChain, regT1, regT2);
+ emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain);
- // Plant callee
- emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, X86Registers::eax);
- storePtr(X86Registers::eax, Address(stackPointerRegister, OBJECT_OFFSETOF(NativeCallFrameStructure, callee)));
-
- // Plant callframe
- move(callFrameRegister, X86Registers::edx);
-
- call(Address(X86Registers::eax, OBJECT_OFFSETOF(JSFunction, m_data)));
-
- // JSValue is a non-POD type, so eax points to it
- emitLoad(0, regT1, regT0, X86Registers::eax);
-#else
- emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, X86Registers::edx); // callee
- move(callFrameRegister, X86Registers::ecx); // callFrame
- call(Address(X86Registers::edx, OBJECT_OFFSETOF(JSFunction, m_data)));
+#if CPU(MIPS)
+ // Allocate stack space for (unused) 16 bytes (8-byte aligned) for 4 arguments.
+ subPtr(TrustedImm32(16), stackPointerRegister);
#endif
- // We've put a few temporaries on the stack in addition to the actual arguments
- // so pull them off now
- addPtr(Imm32(NativeCallFrameSize - sizeof(NativeFunctionCalleeSignature)), stackPointerRegister);
+ // Calling convention is f(argumentGPR0, argumentGPR1, ...).
+ // Host function signature is f(ExecState*).
+ move(callFrameRegister, argumentGPR0);
-#elif CPU(ARM_TRADITIONAL)
- emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
+ emitGetFromCallFrameHeaderPtr(JSStack::Callee, argumentGPR1);
+ loadPtr(Address(argumentGPR1, OBJECT_OFFSETOF(JSFunction, m_executable)), regT2);
- // Allocate stack space for our arglist
- COMPILE_ASSERT((sizeof(ArgList) & 0x7) == 0 && sizeof(JSValue) == 8 && sizeof(Register) == 8, ArgList_should_by_8byte_aligned);
- subPtr(Imm32(sizeof(ArgList)), stackPointerRegister);
-
- // Set up arguments
- subPtr(Imm32(1), regT0); // Don't include 'this' in argcount
-
- // Push argcount
- storePtr(regT0, Address(stackPointerRegister, OBJECT_OFFSETOF(ArgList, m_argCount)));
-
- // Calculate the start of the callframe header, and store in regT1
- move(callFrameRegister, regT1);
- sub32(Imm32(RegisterFile::CallFrameHeaderSize * (int32_t)sizeof(Register)), regT1);
-
- // Calculate start of arguments as callframe header - sizeof(Register) * argcount (regT1)
- mul32(Imm32(sizeof(Register)), regT0, regT0);
- subPtr(regT0, regT1);
-
- // push pointer to arguments
- storePtr(regT1, Address(stackPointerRegister, OBJECT_OFFSETOF(ArgList, m_args)));
-
- // Argument passing method:
- // r0 - points to return value
- // r1 - callFrame
- // r2 - callee
- // stack: this(JSValue) and a pointer to ArgList
-
-#if OS(WINCE)
- // Setup arg4:
- push(stackPointerRegister);
-
- // Setup arg3:
- // regT1 currently points to the first argument, regT1-sizeof(Register) points to 'this'
- load32(Address(regT1, -(int32_t)sizeof(void*) * 2), ARMRegisters::r3);
- push(ARMRegisters::r3);
- load32(Address(regT1, -(int32_t)sizeof(void*)), regT3);
- storePtr(regT3, Address(stackPointerRegister));
-
- // Setup arg2:
- emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT2);
-
- // Setup arg1:
- move(callFrameRegister, regT1);
-
- // Setup arg0:
- move(stackPointerRegister, regT0);
-
- call(Address(regT2, OBJECT_OFFSETOF(JSFunction, m_data)));
-
- load32(Address(stackPointerRegister, 0), regT0);
- load32(Address(stackPointerRegister, 4), regT1);
-
- addPtr(Imm32(sizeof(ArgList) + 8), stackPointerRegister);
-#else // OS(WINCE)
- move(stackPointerRegister, regT3);
- subPtr(Imm32(8), stackPointerRegister);
- move(stackPointerRegister, regT0);
- subPtr(Imm32(8 + 4 + 4 /* padding */), stackPointerRegister);
-
- // Setup arg4:
- storePtr(regT3, Address(stackPointerRegister, 8));
-
- // Setup arg3:
- // regT1 currently points to the first argument, regT1-sizeof(Register) points to 'this'
- load32(Address(regT1, -(int32_t)sizeof(void*) * 2), regT3);
- storePtr(regT3, Address(stackPointerRegister, 0));
- load32(Address(regT1, -(int32_t)sizeof(void*)), regT3);
- storePtr(regT3, Address(stackPointerRegister, 4));
-
- // Setup arg2:
- emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT2);
-
- // Setup arg1:
- move(callFrameRegister, regT1);
-
- call(Address(regT2, OBJECT_OFFSETOF(JSFunction, m_data)));
-
- // Load return value
- load32(Address(stackPointerRegister, 16), regT0);
- load32(Address(stackPointerRegister, 20), regT1);
-
- addPtr(Imm32(sizeof(ArgList) + 16 + 8), stackPointerRegister);
-#endif // OS(WINCE)
+ // call the function
+ nativeCall = call();
+#if CPU(MIPS)
+ // Restore stack space
+ addPtr(TrustedImm32(16), stackPointerRegister);
#endif
- // Check for an exception
- move(ImmPtr(&globalData->exception), regT2);
- Jump sawException = branch32(NotEqual, tagFor(0, regT2), Imm32(JSValue::EmptyValueTag));
-
- // Grab the return address.
- emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT3);
+ restoreReturnAddressBeforeReturn(regT3);
+#else
+#error "JIT not supported on this platform."
+ abortWithReason(JITNotSupported);
+#endif // CPU(X86)
- // Restore our caller's "r".
- emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
+ // Check for an exception
+ Jump sawException = branch32(NotEqual, AbsoluteAddress(reinterpret_cast<char*>(vm->addressOfException()) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
+ emitFunctionEpilogue();
// Return.
- restoreReturnAddressBeforeReturn(regT3);
ret();
// Handle an exception
sawException.link(this);
- // Grab the return address.
- emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT1);
- move(ImmPtr(&globalData->exceptionLocation), regT2);
- storePtr(regT1, regT2);
- move(ImmPtr(FunctionPtr(ctiVMThrowTrampoline).value()), regT2);
- emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
- poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*));
- restoreReturnAddressBeforeReturn(regT2);
- ret();
-#elif ENABLE(JIT_OPTIMIZE_NATIVE_CALL)
-#error "JIT_OPTIMIZE_NATIVE_CALL not yet supported on this platform."
+ storePtr(callFrameRegister, &m_vm->topCallFrame);
+
+#if CPU(X86)
+ addPtr(TrustedImm32(-4), stackPointerRegister);
+ loadPtr(Address(callFrameRegister), X86Registers::ecx);
+ push(X86Registers::ecx);
#else
- UNUSED_PARAM(globalData);
- breakpoint();
+ loadPtr(Address(callFrameRegister), argumentGPR0);
#endif
+ move(TrustedImmPtr(FunctionPtr(operationVMHandleException).value()), regT3);
+ call(regT3);
-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
- Call string_failureCases1Call = makeTailRecursiveCall(string_failureCases1);
- Call string_failureCases2Call = makeTailRecursiveCall(string_failureCases2);
- Call string_failureCases3Call = makeTailRecursiveCall(string_failureCases3);
+#if CPU(X86)
+ addPtr(TrustedImm32(8), stackPointerRegister);
#endif
- // All trampolines constructed! copy the code, link up calls, and set the pointers on the Machine object.
- LinkBuffer patchBuffer(this, m_globalData->executableAllocator.poolForSize(m_assembler.size()), 0);
-
-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
- 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));
-#endif
- patchBuffer.link(callArityCheck1, FunctionPtr(cti_op_call_arityCheck));
- patchBuffer.link(callJSFunction1, FunctionPtr(cti_op_call_JSFunction));
-#if ENABLE(JIT_OPTIMIZE_CALL)
- patchBuffer.link(callArityCheck2, FunctionPtr(cti_op_call_arityCheck));
- patchBuffer.link(callJSFunction2, FunctionPtr(cti_op_call_JSFunction));
- patchBuffer.link(callLazyLinkCall, FunctionPtr(cti_vm_lazyLinkCall));
-#endif
+ jumpToExceptionHandler();
- CodeRef finalCode = patchBuffer.finalizeCode();
- *executablePool = finalCode.m_executablePool;
+ // All trampolines constructed! copy the code, link up calls, and set the pointers on the Machine object.
+ LinkBuffer patchBuffer(*m_vm, *this, GLOBAL_THUNK_ID);
- trampolines->ctiVirtualCall = patchBuffer.trampolineAt(virtualCallBegin);
-#if ENABLE(JIT_OPTIMIZE_NATIVE_CALL)
- trampolines->ctiNativeCallThunk = adoptRef(new NativeExecutable(JITCode(JITCode::HostFunction(patchBuffer.trampolineAt(nativeCallThunk)))));
-#endif
-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
- trampolines->ctiStringLengthTrampoline = patchBuffer.trampolineAt(stringLengthBegin);
-#else
- UNUSED_PARAM(ctiStringLengthTrampoline);
-#endif
-#if ENABLE(JIT_OPTIMIZE_CALL)
- trampolines->ctiVirtualCallLink = patchBuffer.trampolineAt(virtualCallLinkBegin);
-#else
- UNUSED_PARAM(ctiVirtualCallLink);
-#endif
-#if ENABLE(JIT_OPTIMIZE_MOD)
- trampolines->ctiSoftModulo = patchBuffer.trampolineAt(softModBegin);
-#endif
+ patchBuffer.link(nativeCall, FunctionPtr(func));
+ return FINALIZE_CODE(patchBuffer, ("JIT CTI native call"));
}
void JIT::emit_op_mov(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned src = currentInstruction[2].u.operand;
-
+ int dst = currentInstruction[1].u.operand;
+ int 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_bytecodeIndex + OPCODE_LENGTH(op_mov), dst, regT1, regT0);
}
}
+void JIT::emit_op_captured_mov(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+ int src = currentInstruction[2].u.operand;
+
+ emitLoad(src, regT1, regT0);
+ emitNotifyWrite(regT1, regT0, regT2, currentInstruction[3].u.watchpointSet);
+ emitStore(dst, regT1, regT0);
+}
+
void JIT::emit_op_end(Instruction* currentInstruction)
{
- if (m_codeBlock->needsFullScopeChain())
- JITStubCall(this, cti_op_end).call();
- ASSERT(returnValueRegister != callFrameRegister);
+ ASSERT(returnValueGPR != callFrameRegister);
emitLoad(currentInstruction[1].u.operand, regT1, regT0);
- restoreReturnAddressBeforeReturn(Address(callFrameRegister, RegisterFile::ReturnPC * static_cast<int>(sizeof(Register))));
+ emitFunctionEpilogue();
ret();
}
addJump(jump(), target);
}
-void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
+void JIT::emit_op_new_object(Instruction* currentInstruction)
{
- unsigned op1 = currentInstruction[1].u.operand;
- unsigned op2 = currentInstruction[2].u.operand;
- unsigned target = currentInstruction[3].u.operand;
-
- emitTimeoutCheck();
+ Structure* structure = currentInstruction[3].u.objectAllocationProfile->structure();
+ size_t allocationSize = JSFinalObject::allocationSize(structure->inlineCapacity());
+ MarkedAllocator* allocator = &m_vm->heap.allocatorForObjectWithoutDestructor(allocationSize);
- if (isOperandConstantImmediateInt(op1)) {
- emitLoad(op2, regT1, regT0);
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
- addJump(branch32(GreaterThanOrEqual, regT0, Imm32(getConstantOperand(op1).asInt32())), target);
- return;
- }
-
- if (isOperandConstantImmediateInt(op2)) {
- emitLoad(op1, regT1, regT0);
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
- addJump(branch32(LessThanOrEqual, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
- return;
- }
+ RegisterID resultReg = regT0;
+ RegisterID allocatorReg = regT1;
+ RegisterID scratchReg = regT2;
- emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag)));
- addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
- addJump(branch32(LessThanOrEqual, regT0, regT2), target);
+ move(TrustedImmPtr(allocator), allocatorReg);
+ emitAllocateJSObject(allocatorReg, TrustedImmPtr(structure), resultReg, scratchReg);
+ emitStoreCell(currentInstruction[1].u.operand, resultReg);
}
-void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_new_object(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- unsigned op1 = currentInstruction[1].u.operand;
- unsigned op2 = currentInstruction[2].u.operand;
- unsigned target = currentInstruction[3].u.operand;
-
- if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
- linkSlowCase(iter); // int32 check
- linkSlowCase(iter); // int32 check
-
- JITStubCall stubCall(this, cti_op_loop_if_lesseq);
- stubCall.addArgument(op1);
- stubCall.addArgument(op2);
- stubCall.call();
- emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
+ linkSlowCase(iter);
+ int dst = currentInstruction[1].u.operand;
+ Structure* structure = currentInstruction[3].u.objectAllocationProfile->structure();
+ callOperation(operationNewObject, structure);
+ emitStoreCell(dst, returnValueGPR);
}
-void JIT::emit_op_new_object(Instruction* currentInstruction)
+void JIT::emit_op_check_has_instance(Instruction* currentInstruction)
{
- JITStubCall(this, cti_op_new_object).call(currentInstruction[1].u.operand);
+ int baseVal = currentInstruction[3].u.operand;
+
+ emitLoadPayload(baseVal, regT0);
+
+ // Check that baseVal is a cell.
+ emitJumpSlowCaseIfNotJSCell(baseVal);
+
+ // Check that baseVal 'ImplementsHasInstance'.
+ addSlowCase(branchTest8(Zero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(ImplementsDefaultHasInstance)));
}
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;
+ int dst = currentInstruction[1].u.operand;
+ int value = currentInstruction[2].u.operand;
+ int proto = currentInstruction[3].u.operand;
// Load the operands into registers.
// We use regT0 for baseVal since we will be done with this first, and we can then use it for the result.
emitLoadPayload(value, regT2);
- emitLoadPayload(baseVal, regT0);
emitLoadPayload(proto, regT1);
- // Check that value, baseVal, and proto are cells.
+ // Check that proto are cells. baseVal must be a cell - this is checked by op_check_has_instance.
emitJumpSlowCaseIfNotJSCell(value);
- emitJumpSlowCaseIfNotJSCell(baseVal);
emitJumpSlowCaseIfNotJSCell(proto);
-
- // Check that baseVal 'ImplementsDefaultHasInstance'.
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
- addSlowCase(branchTest8(Zero, Address(regT0, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(ImplementsDefaultHasInstance)));
+
+ // Check that prototype is an object
+ addSlowCase(emitJumpIfCellNotObject(regT1));
// Optimistically load the result true, and start looping.
// Initially, regT1 still contains proto and regT2 still contains value.
// As we loop regT2 will be updated with its prototype, recursively walking the prototype chain.
- move(Imm32(JSValue::TrueTag), regT0);
+ move(TrustedImm32(1), regT0);
Label loop(this);
// Load the prototype of the cell in regT2. If this is equal to regT1 - WIN!
// Otherwise, check if we've hit null - if we have then drop out of the loop, if not go again.
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- load32(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
+ loadPtr(Address(regT2, JSCell::structureIDOffset()), 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);
// We get here either by dropping out of the loop, or if value was not an Object. Result is false.
- move(Imm32(JSValue::FalseTag), regT0);
+ move(TrustedImm32(0), regT0);
// isInstance jumps right down to here, to skip setting the result to false (it has already set true).
isInstance.link(this);
emitStoreBool(dst, regT0);
}
-void JIT::emitSlow_op_instanceof(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_check_has_instance(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;
+ int dst = currentInstruction[1].u.operand;
+ int value = currentInstruction[2].u.operand;
+ int baseVal = currentInstruction[3].u.operand;
- linkSlowCaseIfNotJSCell(iter, value);
linkSlowCaseIfNotJSCell(iter, baseVal);
- linkSlowCaseIfNotJSCell(iter, proto);
linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_instanceof);
- stubCall.addArgument(value);
- stubCall.addArgument(baseVal);
- stubCall.addArgument(proto);
- stubCall.call(dst);
-}
+ emitLoad(value, regT1, regT0);
+ emitLoad(baseVal, regT3, regT2);
+ callOperation(operationCheckHasInstance, dst, regT1, regT0, regT3, regT2);
-void JIT::emit_op_new_func(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_new_func);
- stubCall.addArgument(ImmPtr(m_codeBlock->functionDecl(currentInstruction[2].u.operand)));
- stubCall.call(currentInstruction[1].u.operand);
+ emitJumpSlowToHot(jump(), currentInstruction[4].u.operand);
}
-void JIT::emit_op_get_global_var(Instruction* currentInstruction)
+void JIT::emitSlow_op_instanceof(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int dst = currentInstruction[1].u.operand;
- JSGlobalObject* globalObject = static_cast<JSGlobalObject*>(currentInstruction[2].u.jsCell);
- ASSERT(globalObject->isGlobalObject());
- int index = currentInstruction[3].u.operand;
+ int value = currentInstruction[2].u.operand;
+ int proto = currentInstruction[3].u.operand;
- loadPtr(&globalObject->d()->registers, regT2);
+ linkSlowCaseIfNotJSCell(iter, value);
+ linkSlowCaseIfNotJSCell(iter, proto);
+ linkSlowCase(iter);
- emitLoad(index, regT1, regT0, regT2);
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_global_var), dst, regT1, regT0);
+ emitLoad(value, regT1, regT0);
+ emitLoad(proto, regT3, regT2);
+ callOperation(operationInstanceOf, dst, regT1, regT0, regT3, regT2);
}
-void JIT::emit_op_put_global_var(Instruction* currentInstruction)
+void JIT::emit_op_is_undefined(Instruction* currentInstruction)
{
- JSGlobalObject* globalObject = static_cast<JSGlobalObject*>(currentInstruction[1].u.jsCell);
- ASSERT(globalObject->isGlobalObject());
- int index = currentInstruction[2].u.operand;
- int value = currentInstruction[3].u.operand;
-
+ int dst = currentInstruction[1].u.operand;
+ int value = currentInstruction[2].u.operand;
+
emitLoad(value, regT1, regT0);
-
- loadPtr(&globalObject->d()->registers, regT2);
- emitStore(index, regT1, regT0, regT2);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_put_global_var), value, regT1, regT0);
+ Jump isCell = branch32(Equal, regT1, TrustedImm32(JSValue::CellTag));
+
+ compare32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag), regT0);
+ Jump done = jump();
+
+ isCell.link(this);
+ Jump isMasqueradesAsUndefined = branchTest8(NonZero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
+ move(TrustedImm32(0), regT0);
+ Jump notMasqueradesAsUndefined = jump();
+
+ isMasqueradesAsUndefined.link(this);
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT1);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ loadPtr(Address(regT1, Structure::globalObjectOffset()), regT1);
+ compare32(Equal, regT0, regT1, regT0);
+
+ notMasqueradesAsUndefined.link(this);
+ done.link(this);
+ emitStoreBool(dst, regT0);
}
-void JIT::emit_op_get_scoped_var(Instruction* currentInstruction)
+void JIT::emit_op_is_boolean(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
- int index = currentInstruction[2].u.operand;
- int skip = currentInstruction[3].u.operand + m_codeBlock->needsFullScopeChain();
-
- emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT2);
- while (skip--)
- loadPtr(Address(regT2, OBJECT_OFFSETOF(ScopeChainNode, next)), regT2);
-
- loadPtr(Address(regT2, OBJECT_OFFSETOF(ScopeChainNode, object)), regT2);
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSVariableObject, d)), regT2);
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), regT2);
-
- emitLoad(index, regT1, regT0, regT2);
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_get_scoped_var), dst, regT1, regT0);
+ int value = currentInstruction[2].u.operand;
+
+ emitLoadTag(value, regT0);
+ compare32(Equal, regT0, TrustedImm32(JSValue::BooleanTag), regT0);
+ emitStoreBool(dst, regT0);
}
-void JIT::emit_op_put_scoped_var(Instruction* currentInstruction)
+void JIT::emit_op_is_number(Instruction* currentInstruction)
{
- int index = currentInstruction[1].u.operand;
- int skip = currentInstruction[2].u.operand + m_codeBlock->needsFullScopeChain();
- int value = currentInstruction[3].u.operand;
-
- emitLoad(value, regT1, regT0);
-
- emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT2);
- while (skip--)
- loadPtr(Address(regT2, OBJECT_OFFSETOF(ScopeChainNode, next)), regT2);
-
- loadPtr(Address(regT2, OBJECT_OFFSETOF(ScopeChainNode, object)), regT2);
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSVariableObject, d)), regT2);
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), regT2);
-
- emitStore(index, regT1, regT0, regT2);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_put_scoped_var), value, regT1, regT0);
+ int dst = currentInstruction[1].u.operand;
+ int 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_tear_off_activation(Instruction* currentInstruction)
+void JIT::emit_op_is_string(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_tear_off_activation);
- stubCall.addArgument(currentInstruction[1].u.operand);
- stubCall.call();
+ int dst = currentInstruction[1].u.operand;
+ int value = currentInstruction[2].u.operand;
+
+ emitLoad(value, regT1, regT0);
+ Jump isNotCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
+
+ compare8(Equal, Address(regT0, JSCell::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_arguments(Instruction*)
+void JIT::emit_op_tear_off_activation(Instruction* currentInstruction)
{
- JITStubCall(this, cti_op_tear_off_arguments).call();
+ int activation = currentInstruction[1].u.operand;
+ Jump activationNotCreated = branch32(Equal, tagFor(activation), TrustedImm32(JSValue::EmptyValueTag));
+ emitLoadPayload(activation, regT0);
+ callOperation(operationTearOffActivation, regT0);
+ activationNotCreated.link(this);
}
-void JIT::emit_op_new_array(Instruction* currentInstruction)
+void JIT::emit_op_tear_off_arguments(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_new_array);
- stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
- stubCall.addArgument(Imm32(currentInstruction[3].u.operand));
- stubCall.call(currentInstruction[1].u.operand);
-}
+ VirtualRegister arguments = VirtualRegister(currentInstruction[1].u.operand);
+ int activation = currentInstruction[2].u.operand;
-void JIT::emit_op_resolve(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_resolve);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
- stubCall.call(currentInstruction[1].u.operand);
+ Jump argsNotCreated = branch32(Equal, tagFor(unmodifiedArgumentsRegister(arguments).offset()), TrustedImm32(JSValue::EmptyValueTag));
+ emitLoadPayload(unmodifiedArgumentsRegister(VirtualRegister(arguments)).offset(), regT0);
+ emitLoadPayload(activation, regT1);
+ callOperation(operationTearOffArguments, regT0, regT1);
+ argsNotCreated.link(this);
}
void JIT::emit_op_to_primitive(Instruction* currentInstruction)
emitLoad(src, regT1, regT0);
- Jump isImm = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr)));
+ Jump isImm = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
+ addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
isImm.link(this);
if (dst != src)
emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + 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);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_to_primitive);
+ slowPathCall.call();
}
void JIT::emit_op_strcat(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_strcat);
- stubCall.addArgument(Imm32(currentInstruction[2].u.operand));
- stubCall.addArgument(Imm32(currentInstruction[3].u.operand));
- stubCall.call(currentInstruction[1].u.operand);
-}
-
-void JIT::emit_op_resolve_base(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_resolve_base);
- stubCall.addArgument(ImmPtr(&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(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
- stubCall.addArgument(Imm32(currentInstruction[3].u.operand + m_codeBlock->needsFullScopeChain()));
- stubCall.call(currentInstruction[1].u.operand);
-}
-
-void JIT::emit_op_resolve_global(Instruction* currentInstruction, bool dynamic)
-{
- // FIXME: Optimize to use patching instead of so many memory accesses.
-
- unsigned dst = currentInstruction[1].u.operand;
- void* globalObject = currentInstruction[2].u.jsCell;
-
- unsigned currentIndex = m_globalResolveInfoIndex++;
- void* structureAddress = &(m_codeBlock->globalResolveInfo(currentIndex).structure);
- void* offsetAddr = &(m_codeBlock->globalResolveInfo(currentIndex).offset);
-
- // Verify structure.
- move(ImmPtr(globalObject), regT0);
- loadPtr(structureAddress, regT1);
- addSlowCase(branchPtr(NotEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure))));
-
- // Load property.
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSGlobalObject, m_externalStorage)), regT2);
- load32(offsetAddr, regT3);
- load32(BaseIndex(regT2, regT3, TimesEight), regT0); // payload
- load32(BaseIndex(regT2, regT3, TimesEight, 4), regT1); // tag
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + 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;
- void* globalObject = currentInstruction[2].u.jsCell;
- Identifier* ident = &m_codeBlock->identifier(currentInstruction[3].u.operand);
-
- unsigned currentIndex = m_globalResolveInfoIndex++;
-
- linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_resolve_global);
- stubCall.addArgument(ImmPtr(globalObject));
- stubCall.addArgument(ImmPtr(ident));
- stubCall.addArgument(Imm32(currentIndex));
- stubCall.call(dst);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_strcat);
+ slowPathCall.call();
}
void JIT::emit_op_not(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned src = currentInstruction[2].u.operand;
+ int dst = currentInstruction[1].u.operand;
+ int src = currentInstruction[2].u.operand;
emitLoadTag(src, regT0);
- xor32(Imm32(JSValue::FalseTag), regT0);
- addSlowCase(branchTest32(NonZero, regT0, Imm32(~1)));
- xor32(Imm32(JSValue::TrueTag), 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);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_not);
+ slowPathCall.call();
}
void JIT::emit_op_jfalse(Instruction* currentInstruction)
{
- unsigned cond = currentInstruction[1].u.operand;
+ int cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(cond, regT1, regT0);
- Jump isTrue = branch32(Equal, regT1, Imm32(JSValue::TrueTag));
- addJump(branch32(Equal, regT1, Imm32(JSValue::FalseTag)), target);
-
- Jump isNotInteger = branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag));
- Jump isTrue2 = branch32(NotEqual, regT0, Imm32(0));
- addJump(jump(), target);
-
- if (supportsFloatingPoint()) {
- isNotInteger.link(this);
-
- addSlowCase(branch32(Above, regT1, Imm32(JSValue::LowestTag)));
-
- emitLoadDouble(cond, fpRegT0);
- addJump(branchDoubleZeroOrNaN(fpRegT0, fpRegT1), target);
- } else
- addSlowCase(isNotInteger);
-
- isTrue.link(this);
- isTrue2.link(this);
+ 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;
+ int cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_jtrue);
- stubCall.addArgument(cond);
- stubCall.call();
- emitJumpSlowToHot(branchTest32(Zero, regT0), target); // Inverted.
+
+ if (supportsFloatingPoint()) {
+ // regT1 contains the tag from the hot path.
+ 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);
+ }
+
+ callOperation(operationConvertJSValueToBoolean, regT1, regT0);
+ emitJumpSlowToHot(branchTest32(Zero, returnValueGPR), target); // Inverted.
}
void JIT::emit_op_jtrue(Instruction* currentInstruction)
{
- unsigned cond = currentInstruction[1].u.operand;
+ int cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(cond, regT1, regT0);
- Jump isFalse = branch32(Equal, regT1, Imm32(JSValue::FalseTag));
- addJump(branch32(Equal, regT1, Imm32(JSValue::TrueTag)), target);
-
- Jump isNotInteger = branch32(NotEqual, regT1, Imm32(JSValue::Int32Tag));
- Jump isFalse2 = branch32(Equal, regT0, Imm32(0));
- addJump(jump(), target);
-
- if (supportsFloatingPoint()) {
- isNotInteger.link(this);
-
- addSlowCase(branch32(Above, regT1, Imm32(JSValue::LowestTag)));
-
- emitLoadDouble(cond, fpRegT0);
- addJump(branchDoubleNonZero(fpRegT0, fpRegT1), target);
- } else
- addSlowCase(isNotInteger);
-
- isFalse.link(this);
- isFalse2.link(this);
+ 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;
+ int cond = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_jtrue);
- stubCall.addArgument(cond);
- stubCall.call();
- emitJumpSlowToHot(branchTest32(NonZero, regT0), target);
+
+ if (supportsFloatingPoint()) {
+ // regT1 contains the tag from the hot path.
+ 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);
+ }
+
+ callOperation(operationConvertJSValueToBoolean, regT1, regT0);
+ emitJumpSlowToHot(branchTest32(NonZero, returnValueGPR), target);
}
void JIT::emit_op_jeq_null(Instruction* currentInstruction)
{
- unsigned src = currentInstruction[1].u.operand;
+ int src = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
- Jump isImmediate = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
+ Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
- // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- addJump(branchTest8(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
-
- Jump wasNotImmediate = jump();
+ Jump isNotMasqueradesAsUndefined = branchTest8(Zero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT2);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ addJump(branchPtr(Equal, Address(regT2, Structure::globalObjectOffset()), regT0), target);
+ Jump masqueradesGlobalObjectIsForeign = jump();
// Now handle the immediate cases - undefined & null
isImmediate.link(this);
+ ASSERT((JSValue::UndefinedTag + 1 == JSValue::NullTag) && (JSValue::NullTag & 0x1));
+ or32(TrustedImm32(1), regT1);
+ addJump(branch32(Equal, regT1, TrustedImm32(JSValue::NullTag)), target);
- set32(Equal, regT1, Imm32(JSValue::NullTag), regT2);
- set32(Equal, regT1, Imm32(JSValue::UndefinedTag), regT1);
- or32(regT2, regT1);
-
- addJump(branchTest32(NonZero, regT1), target);
-
- wasNotImmediate.link(this);
+ isNotMasqueradesAsUndefined.link(this);
+ masqueradesGlobalObjectIsForeign.link(this);
}
void JIT::emit_op_jneq_null(Instruction* currentInstruction)
{
- unsigned src = currentInstruction[1].u.operand;
+ int src = currentInstruction[1].u.operand;
unsigned target = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
- Jump isImmediate = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
-
- // First, handle JSCell cases - check MasqueradesAsUndefined bit on the structure.
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- addJump(branchTest8(Zero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined)), target);
+ Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
+ addJump(branchTest8(Zero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined)), target);
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT2);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ addJump(branchPtr(NotEqual, Address(regT2, Structure::globalObjectOffset()), regT0), target);
Jump wasNotImmediate = jump();
// Now handle the immediate cases - undefined & null
isImmediate.link(this);
- set32(Equal, regT1, Imm32(JSValue::NullTag), regT2);
- set32(Equal, regT1, Imm32(JSValue::UndefinedTag), regT1);
- or32(regT2, regT1);
-
- addJump(branchTest32(Zero, regT1), target);
+ 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;
+ int src = currentInstruction[1].u.operand;
+ Special::Pointer ptr = currentInstruction[2].u.specialPointer;
unsigned target = currentInstruction[3].u.operand;
emitLoad(src, regT1, regT0);
- addJump(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)), target);
- addJump(branchPtr(NotEqual, regT0, ImmPtr(ptr)), target);
-}
-
-void JIT::emit_op_jsr(Instruction* currentInstruction)
-{
- int retAddrDst = currentInstruction[1].u.operand;
- int target = currentInstruction[2].u.operand;
- DataLabelPtr storeLocation = storePtrWithPatch(ImmPtr(0), Address(callFrameRegister, sizeof(Register) * retAddrDst));
- addJump(jump(), target);
- m_jsrSites.append(JSRInfo(storeLocation, label()));
-}
-
-void JIT::emit_op_sret(Instruction* currentInstruction)
-{
- jump(Address(callFrameRegister, sizeof(Register) * currentInstruction[1].u.operand));
+ addJump(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)), target);
+ addJump(branchPtr(NotEqual, regT0, TrustedImmPtr(actualPointerFor(m_codeBlock, 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;
+ int dst = currentInstruction[1].u.operand;
+ int src1 = currentInstruction[2].u.operand;
+ int src2 = currentInstruction[3].u.operand;
emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
addSlowCase(branch32(NotEqual, regT1, regT3));
- addSlowCase(branch32(Equal, regT1, Imm32(JSValue::CellTag)));
- addSlowCase(branch32(Below, regT1, Imm32(JSValue::LowestTag)));
+ addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::CellTag)));
+ addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
- set8(Equal, regT0, regT2, regT0);
- or32(Imm32(JSValue::FalseTag), regT0);
+ 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;
+ int dst = currentInstruction[1].u.operand;
+ int op1 = currentInstruction[2].u.operand;
+ int op2 = currentInstruction[3].u.operand;
JumpList storeResult;
JumpList genericCase;
genericCase.append(getSlowCase(iter)); // tags not equal
linkSlowCase(iter); // tags equal and JSCell
- genericCase.append(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr)));
- genericCase.append(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsStringVPtr)));
+ genericCase.append(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
+ genericCase.append(branchPtr(NotEqual, Address(regT2, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
// String case.
- JITStubCall stubCallEqStrings(this, cti_op_eq_strings);
- stubCallEqStrings.addArgument(regT0);
- stubCallEqStrings.addArgument(regT2);
- stubCallEqStrings.call();
+ callOperation(operationCompareStringEq, regT0, regT2);
storeResult.append(jump());
// Generic case.
genericCase.append(getSlowCase(iter)); // doubles
genericCase.link(this);
- JITStubCall stubCallEq(this, cti_op_eq);
- stubCallEq.addArgument(op1);
- stubCallEq.addArgument(op2);
- stubCallEq.call(regT0);
+ emitLoad(op1, regT1, regT0);
+ emitLoad(op2, regT3, regT2);
+ callOperation(operationCompareEq, regT1, regT0, regT3, regT2);
storeResult.link(this);
- or32(Imm32(JSValue::FalseTag), regT0);
- emitStoreBool(dst, regT0);
+ emitStoreBool(dst, returnValueGPR);
}
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;
+ int dst = currentInstruction[1].u.operand;
+ int src1 = currentInstruction[2].u.operand;
+ int src2 = currentInstruction[3].u.operand;
emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
addSlowCase(branch32(NotEqual, regT1, regT3));
- addSlowCase(branch32(Equal, regT1, Imm32(JSValue::CellTag)));
- addSlowCase(branch32(Below, regT1, Imm32(JSValue::LowestTag)));
+ addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::CellTag)));
+ addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
- set8(NotEqual, regT0, regT2, regT0);
- or32(Imm32(JSValue::FalseTag), regT0);
+ 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;
+ int dst = currentInstruction[1].u.operand;
JumpList storeResult;
JumpList genericCase;
genericCase.append(getSlowCase(iter)); // tags not equal
linkSlowCase(iter); // tags equal and JSCell
- genericCase.append(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsStringVPtr)));
- genericCase.append(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsStringVPtr)));
+ genericCase.append(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
+ genericCase.append(branchPtr(NotEqual, Address(regT2, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
// String case.
- JITStubCall stubCallEqStrings(this, cti_op_eq_strings);
- stubCallEqStrings.addArgument(regT0);
- stubCallEqStrings.addArgument(regT2);
- stubCallEqStrings.call(regT0);
+ callOperation(operationCompareStringEq, regT0, regT2);
storeResult.append(jump());
// Generic case.
genericCase.append(getSlowCase(iter)); // doubles
genericCase.link(this);
- JITStubCall stubCallEq(this, cti_op_eq);
- stubCallEq.addArgument(regT1, regT0);
- stubCallEq.addArgument(regT3, regT2);
- stubCallEq.call(regT0);
+ callOperation(operationCompareEq, regT1, regT0, regT3, regT2);
storeResult.link(this);
- xor32(Imm32(0x1), regT0);
- or32(Imm32(JSValue::FalseTag), regT0);
- emitStoreBool(dst, regT0);
+ xor32(TrustedImm32(0x1), returnValueGPR);
+ emitStoreBool(dst, returnValueGPR);
}
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;
+ int dst = currentInstruction[1].u.operand;
+ int src1 = currentInstruction[2].u.operand;
+ int src2 = currentInstruction[3].u.operand;
- emitLoadTag(src1, regT0);
- emitLoadTag(src2, regT1);
+ emitLoad2(src1, regT1, regT0, src2, regT3, regT2);
- // Jump to a slow case if either operand is double, or if both operands are
- // cells and/or Int32s.
- move(regT0, regT2);
- and32(regT1, regT2);
- addSlowCase(branch32(Below, regT2, Imm32(JSValue::LowestTag)));
- addSlowCase(branch32(AboveOrEqual, regT2, Imm32(JSValue::CellTag)));
+ // Bail if the tags differ, or are double.
+ addSlowCase(branch32(NotEqual, regT1, regT3));
+ addSlowCase(branch32(Below, regT1, TrustedImm32(JSValue::LowestTag)));
+ // Jump to a slow case if both are strings.
+ Jump notCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
+ Jump firstNotString = branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get()));
+ addSlowCase(branchPtr(Equal, Address(regT2, JSCell::structureIDOffset()), TrustedImmPtr(m_vm->stringStructure.get())));
+ notCell.link(this);
+ firstNotString.link(this);
+
+ // Simply compare the payloads.
if (type == OpStrictEq)
- set8(Equal, regT0, regT1, regT0);
+ compare32(Equal, regT0, regT2, regT0);
else
- set8(NotEqual, regT0, regT1, regT0);
-
- or32(Imm32(JSValue::FalseTag), regT0);
+ compare32(NotEqual, regT0, regT2, regT0);
emitStoreBool(dst, regT0);
}
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);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_stricteq);
+ slowPathCall.call();
}
void JIT::emit_op_nstricteq(Instruction* currentInstruction)
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);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_nstricteq);
+ slowPathCall.call();
}
void JIT::emit_op_eq_null(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned src = currentInstruction[2].u.operand;
+ int dst = currentInstruction[1].u.operand;
+ int src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
- Jump isImmediate = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
+ Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT1);
- setTest8(NonZero, Address(regT1, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined), regT1);
+ Jump isMasqueradesAsUndefined = branchTest8(NonZero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
+ move(TrustedImm32(0), regT1);
+ Jump wasNotMasqueradesAsUndefined = jump();
+ isMasqueradesAsUndefined.link(this);
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT2);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ loadPtr(Address(regT2, Structure::globalObjectOffset()), regT2);
+ compare32(Equal, regT0, regT2, regT1);
Jump wasNotImmediate = jump();
isImmediate.link(this);
- set8(Equal, regT1, Imm32(JSValue::NullTag), regT2);
- set8(Equal, regT1, Imm32(JSValue::UndefinedTag), regT1);
+ compare32(Equal, regT1, TrustedImm32(JSValue::NullTag), regT2);
+ compare32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag), regT1);
or32(regT2, regT1);
wasNotImmediate.link(this);
-
- or32(Imm32(JSValue::FalseTag), regT1);
+ wasNotMasqueradesAsUndefined.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;
+ int dst = currentInstruction[1].u.operand;
+ int src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
- Jump isImmediate = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
+ Jump isImmediate = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT1);
- setTest8(Zero, Address(regT1, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(MasqueradesAsUndefined), regT1);
+ Jump isMasqueradesAsUndefined = branchTest8(NonZero, Address(regT0, JSCell::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
+ move(TrustedImm32(1), regT1);
+ Jump wasNotMasqueradesAsUndefined = jump();
+ isMasqueradesAsUndefined.link(this);
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT2);
+ move(TrustedImmPtr(m_codeBlock->globalObject()), regT0);
+ loadPtr(Address(regT2, Structure::globalObjectOffset()), regT2);
+ compare32(NotEqual, regT0, regT2, regT1);
Jump wasNotImmediate = jump();
isImmediate.link(this);
- set8(NotEqual, regT1, Imm32(JSValue::NullTag), regT2);
- set8(NotEqual, regT1, Imm32(JSValue::UndefinedTag), regT1);
+ compare32(NotEqual, regT1, TrustedImm32(JSValue::NullTag), regT2);
+ compare32(NotEqual, regT1, TrustedImm32(JSValue::UndefinedTag), regT1);
and32(regT2, regT1);
wasNotImmediate.link(this);
-
- or32(Imm32(JSValue::FalseTag), regT1);
+ wasNotMasqueradesAsUndefined.link(this);
emitStoreBool(dst, regT1);
}
-void JIT::emit_op_resolve_with_base(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_resolve_with_base);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
- stubCall.addArgument(Imm32(currentInstruction[1].u.operand));
- stubCall.call(currentInstruction[2].u.operand);
-}
-
-void JIT::emit_op_new_func_exp(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_new_func_exp);
- stubCall.addArgument(ImmPtr(m_codeBlock->functionExpr(currentInstruction[2].u.operand)));
- stubCall.call(currentInstruction[1].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
- // cti_op_throw always changes it's return address,
- // this point in the code should never be reached.
- breakpoint();
-#endif
+ ASSERT(regT0 == returnValueGPR);
+ emitLoad(currentInstruction[1].u.operand, regT1, regT0);
+ callOperationNoExceptionCheck(operationThrow, regT1, regT0);
+ jumpToExceptionHandler();
}
void JIT::emit_op_get_pnames(Instruction* currentInstruction)
emitLoad(base, regT1, regT0);
if (!m_codeBlock->isKnownNotImmediate(base))
- isNotObject.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
- if (base != m_codeBlock->thisRegister()) {
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- isNotObject.append(branch8(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_type)), Imm32(ObjectType)));
- }
+ isNotObject.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
+ if (VirtualRegister(base) != m_codeBlock->thisRegister() || m_codeBlock->isStrictMode())
+ isNotObject.append(emitJumpIfCellNotObject(regT0));
// We could inline the case where you have a valid cache, but
// this call doesn't seem to be hot.
Label isObject(this);
- JITStubCall getPnamesStubCall(this, cti_op_get_pnames);
- getPnamesStubCall.addArgument(regT0);
- getPnamesStubCall.call(dst);
+ callOperation(operationGetPNames, regT0);
+ emitStoreCell(dst, returnValueGPR);
load32(Address(regT0, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStringsSize)), regT3);
- store32(Imm32(0), addressFor(i));
- store32(regT3, addressFor(size));
+ 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, Imm32(JSValue::NullTag)), breakTarget);
- addJump(branch32(Equal, regT1, Imm32(JSValue::UndefinedTag)), breakTarget);
- JITStubCall toObjectStubCall(this, cti_to_object);
- toObjectStubCall.addArgument(regT1, regT0);
- toObjectStubCall.call(base);
+ addJump(branch32(Equal, regT1, TrustedImm32(JSValue::NullTag)), breakTarget);
+ addJump(branch32(Equal, regT1, TrustedImm32(JSValue::UndefinedTag)), breakTarget);
+ callOperation(operationToObject, base, regT1, regT0);
jump().linkTo(isObject, this);
end.link(this);
JumpList callHasProperty;
Label begin(this);
- load32(addressFor(i), regT0);
- Jump end = branch32(Equal, regT0, addressFor(size));
+ load32(intPayloadFor(i), regT0);
+ Jump end = branch32(Equal, regT0, intPayloadFor(size));
// Grab key @ i
- loadPtr(addressFor(it), regT1);
+ loadPtr(payloadFor(it), regT1);
loadPtr(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStrings)), regT2);
load32(BaseIndex(regT2, regT0, TimesEight), regT2);
- store32(Imm32(JSValue::CellTag), tagFor(dst));
+ store32(TrustedImm32(JSValue::CellTag), tagFor(dst));
store32(regT2, payloadFor(dst));
// Increment i
- add32(Imm32(1), regT0);
- store32(regT0, addressFor(i));
+ add32(TrustedImm32(1), regT0);
+ store32(regT0, intPayloadFor(i));
// Verify that i is valid:
- loadPtr(addressFor(base), regT0);
+ loadPtr(payloadFor(base), regT0);
// Test base's structure
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+ loadPtr(Address(regT0, JSCell::structureIDOffset()), regT2);
callHasProperty.append(branchPtr(NotEqual, regT2, Address(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure)))));
// Test base's prototype chain
addJump(branchTestPtr(Zero, Address(regT3)), target);
Label checkPrototype(this);
- callHasProperty.append(branch32(Equal, Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), Imm32(JSValue::NullTag)));
- loadPtr(Address(regT2, OBJECT_OFFSETOF(Structure, m_prototype) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT2);
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+ 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::structureIDOffset()), regT2);
callHasProperty.append(branchPtr(NotEqual, regT2, Address(regT3)));
- addPtr(Imm32(sizeof(Structure*)), regT3);
+ addPtr(TrustedImm32(sizeof(Structure*)), regT3);
branchTestPtr(NonZero, Address(regT3)).linkTo(checkPrototype, this);
// Continue loop.
// Slow case: Ask the object if i is valid.
callHasProperty.link(this);
loadPtr(addressFor(dst), regT1);
- JITStubCall stubCall(this, cti_has_property);
- stubCall.addArgument(regT0);
- stubCall.addArgument(regT1);
- stubCall.call();
+ callOperation(operationHasProperty, regT0, regT1);
// Test for valid key.
addJump(branchTest32(NonZero, regT0), target);
end.link(this);
}
-void JIT::emit_op_push_scope(Instruction* currentInstruction)
+void JIT::emit_op_push_with_scope(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_push_scope);
- stubCall.addArgument(currentInstruction[1].u.operand);
- stubCall.call(currentInstruction[1].u.operand);
+ emitLoad(currentInstruction[1].u.operand, regT1, regT0);
+ callOperation(operationPushWithScope, regT1, regT0);
}
void JIT::emit_op_pop_scope(Instruction*)
{
- JITStubCall(this, cti_op_pop_scope).call();
+ callOperation(operationPopScope);
}
-void JIT::emit_op_to_jsnumber(Instruction* currentInstruction)
+void JIT::emit_op_to_number(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int src = currentInstruction[2].u.operand;
emitLoad(src, regT1, regT0);
- Jump isInt32 = branch32(Equal, regT1, Imm32(JSValue::Int32Tag));
- addSlowCase(branch32(AboveOrEqual, regT1, Imm32(JSValue::EmptyValueTag)));
+ Jump isInt32 = branch32(Equal, regT1, TrustedImm32(JSValue::Int32Tag));
+ addSlowCase(branch32(AboveOrEqual, regT1, TrustedImm32(JSValue::LowestTag)));
isInt32.link(this);
if (src != dst)
emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_to_jsnumber), dst, regT1, regT0);
}
-void JIT::emitSlow_op_to_jsnumber(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_to_number(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);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_to_number);
+ slowPathCall.call();
}
-void JIT::emit_op_push_new_scope(Instruction* currentInstruction)
+void JIT::emit_op_push_name_scope(Instruction* currentInstruction)
{
- JITStubCall stubCall(this, cti_op_push_new_scope);
- stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
- stubCall.addArgument(currentInstruction[3].u.operand);
- stubCall.call(currentInstruction[1].u.operand);
+ emitLoad(currentInstruction[2].u.operand, regT1, regT0);
+ callOperation(operationPushNameScope, &m_codeBlock->identifier(currentInstruction[1].u.operand), regT1, regT0, currentInstruction[3].u.operand);
}
void JIT::emit_op_catch(Instruction* currentInstruction)
{
- unsigned exception = currentInstruction[1].u.operand;
+ move(TrustedImmPtr(m_vm), regT3);
+ // operationThrow returns the callFrame for the handler.
+ load32(Address(regT3, VM::callFrameForThrowOffset()), callFrameRegister);
- // This opcode only executes after a return from cti_op_throw.
+ addPtr(TrustedImm32(stackPointerOffsetFor(codeBlock()) * sizeof(Register)), callFrameRegister, stackPointerRegister);
- // cti_op_throw may have taken us to a call frame further up the stack; reload
- // the call frame pointer to adjust.
- peek(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*));
+ // Now store the exception returned by operationThrow.
+ load32(Address(regT3, VM::exceptionOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
+ load32(Address(regT3, VM::exceptionOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
+ store32(TrustedImm32(JSValue().payload()), Address(regT3, VM::exceptionOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
+ store32(TrustedImm32(JSValue().tag()), Address(regT3, VM::exceptionOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
- // Now store the exception returned by cti_op_throw.
+ unsigned exception = currentInstruction[1].u.operand;
emitStore(exception, regT1, regT0);
- map(m_bytecodeIndex + OPCODE_LENGTH(op_catch), exception, regT1, regT0);
-}
-
-void JIT::emit_op_jmp_scopes(Instruction* currentInstruction)
-{
- JITStubCall stubCall(this, cti_op_jmp_scopes);
- stubCall.addArgument(Imm32(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;
+ size_t tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
// create jump table for switch destinations, track this switch statement.
- SimpleJumpTable* jumpTable = &m_codeBlock->immediateSwitchJumpTable(tableIndex);
- m_switches.append(SwitchRecord(jumpTable, m_bytecodeIndex, defaultOffset, SwitchRecord::Immediate));
- jumpTable->ctiOffsets.grow(jumpTable->branchOffsets.size());
+ SimpleJumpTable* jumpTable = &m_codeBlock->switchJumpTable(tableIndex);
+ m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset, SwitchRecord::Immediate));
+ jumpTable->ensureCTITable();
- JITStubCall stubCall(this, cti_op_switch_imm);
- stubCall.addArgument(scrutinee);
- stubCall.addArgument(Imm32(tableIndex));
- stubCall.call();
- jump(regT0);
+ emitLoad(scrutinee, regT1, regT0);
+ callOperation(operationSwitchImmWithUnknownKeyType, regT1, regT0, tableIndex);
+ jump(returnValueGPR);
}
void JIT::emit_op_switch_char(Instruction* currentInstruction)
{
- unsigned tableIndex = currentInstruction[1].u.operand;
+ size_t tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
// create jump table for switch destinations, track this switch statement.
- SimpleJumpTable* jumpTable = &m_codeBlock->characterSwitchJumpTable(tableIndex);
- m_switches.append(SwitchRecord(jumpTable, m_bytecodeIndex, defaultOffset, SwitchRecord::Character));
- jumpTable->ctiOffsets.grow(jumpTable->branchOffsets.size());
+ SimpleJumpTable* jumpTable = &m_codeBlock->switchJumpTable(tableIndex);
+ m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset, SwitchRecord::Character));
+ jumpTable->ensureCTITable();
- JITStubCall stubCall(this, cti_op_switch_char);
- stubCall.addArgument(scrutinee);
- stubCall.addArgument(Imm32(tableIndex));
- stubCall.call();
- jump(regT0);
+ emitLoad(scrutinee, regT1, regT0);
+ callOperation(operationSwitchCharWithUnknownKeyType, regT1, regT0, tableIndex);
+ jump(returnValueGPR);
}
void JIT::emit_op_switch_string(Instruction* currentInstruction)
{
- unsigned tableIndex = currentInstruction[1].u.operand;
+ size_t tableIndex = currentInstruction[1].u.operand;
unsigned defaultOffset = currentInstruction[2].u.operand;
unsigned scrutinee = currentInstruction[3].u.operand;
// create jump table for switch destinations, track this switch statement.
StringJumpTable* jumpTable = &m_codeBlock->stringSwitchJumpTable(tableIndex);
- m_switches.append(SwitchRecord(jumpTable, m_bytecodeIndex, defaultOffset));
+ m_switches.append(SwitchRecord(jumpTable, m_bytecodeOffset, defaultOffset));
- JITStubCall stubCall(this, cti_op_switch_string);
- stubCall.addArgument(scrutinee);
- stubCall.addArgument(Imm32(tableIndex));
- stubCall.call();
- jump(regT0);
+ emitLoad(scrutinee, regT1, regT0);
+ callOperation(operationSwitchStringWithUnknownKeyType, regT1, regT0, tableIndex);
+ jump(returnValueGPR);
}
-void JIT::emit_op_new_error(Instruction* currentInstruction)
+void JIT::emit_op_throw_static_error(Instruction* currentInstruction)
{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned type = currentInstruction[2].u.operand;
- unsigned message = currentInstruction[3].u.operand;
-
- JITStubCall stubCall(this, cti_op_new_error);
- stubCall.addArgument(Imm32(type));
- stubCall.addArgument(m_codeBlock->getConstant(message));
- stubCall.addArgument(Imm32(m_bytecodeIndex));
- stubCall.call(dst);
+ emitLoad(m_codeBlock->getConstant(currentInstruction[1].u.operand), regT1, regT0);
+ callOperation(operationThrowStaticError, regT1, regT0, currentInstruction[2].u.operand);
}
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
+ load32(codeBlock()->debuggerRequestsAddress(), regT0);
+ Jump noDebuggerRequests = branchTest32(Zero, regT0);
+ callOperation(operationDebug, currentInstruction[1].u.operand);
+ noDebuggerRequests.link(this);
}
-void JIT::emit_op_enter(Instruction*)
+void JIT::emit_op_enter(Instruction* currentInstruction)
{
+ emitEnterOptimizationCheck();
+
// Even though JIT code doesn't use them, we initialize our constant
// registers to zap stale pointers, to avoid unnecessarily prolonging
// object lifetime and increasing GC pressure.
for (int i = 0; i < m_codeBlock->m_numVars; ++i)
- emitStore(i, jsUndefined());
+ emitStore(virtualRegisterForLocal(i).offset(), jsUndefined());
+
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_enter);
+ slowPathCall.call();
}
-void JIT::emit_op_enter_with_activation(Instruction* currentInstruction)
+void JIT::emit_op_create_activation(Instruction* currentInstruction)
{
- emit_op_enter(currentInstruction);
+ int activation = currentInstruction[1].u.operand;
+
+ Jump activationCreated = branch32(NotEqual, tagFor(activation), TrustedImm32(JSValue::EmptyValueTag));
+ callOperation(operationCreateActivation, 0);
+ emitStoreCell(activation, returnValueGPR);
+ activationCreated.link(this);
+}
- JITStubCall(this, cti_op_push_activation).call(currentInstruction[1].u.operand);
+void JIT::emit_op_create_arguments(Instruction* currentInstruction)
+{
+ int dst = currentInstruction[1].u.operand;
+
+ Jump argsCreated = branch32(NotEqual, tagFor(dst), TrustedImm32(JSValue::EmptyValueTag));
+ callOperation(operationCreateArguments);
+ emitStoreCell(dst, returnValueGPR);
+ emitStoreCell(unmodifiedArgumentsRegister(VirtualRegister(dst)).offset(), returnValueGPR);
+ argsCreated.link(this);
}
-void JIT::emit_op_create_arguments(Instruction*)
+void JIT::emit_op_init_lazy_reg(Instruction* currentInstruction)
{
- Jump argsCreated = branch32(NotEqual, tagFor(RegisterFile::ArgumentsRegister, callFrameRegister), Imm32(JSValue::EmptyValueTag));
+ int dst = currentInstruction[1].u.operand;
- // If we get here the arguments pointer is a null cell - i.e. arguments need lazy creation.
- if (m_codeBlock->m_numParameters == 1)
- JITStubCall(this, cti_op_create_arguments_no_params).call();
- else
- JITStubCall(this, cti_op_create_arguments).call();
+ emitStore(dst, JSValue());
+}
- argsCreated.link(this);
+void JIT::emit_op_get_callee(Instruction* currentInstruction)
+{
+ int result = currentInstruction[1].u.operand;
+ WriteBarrierBase<JSCell>* cachedFunction = ¤tInstruction[2].u.jsCell;
+ emitGetFromCallFrameHeaderPtr(JSStack::Callee, regT0);
+
+ loadPtr(cachedFunction, regT2);
+ addSlowCase(branchPtr(NotEqual, regT0, regT2));
+
+ move(TrustedImm32(JSValue::CellTag), regT1);
+ emitStore(result, regT1, regT0);
}
-void JIT::emit_op_init_arguments(Instruction*)
+void JIT::emitSlow_op_get_callee(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
- emitStore(RegisterFile::ArgumentsRegister, JSValue(), callFrameRegister);
+ linkSlowCase(iter);
+
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_get_callee);
+ slowPathCall.call();
}
-void JIT::emit_op_convert_this(Instruction* currentInstruction)
+void JIT::emit_op_create_this(Instruction* currentInstruction)
{
- unsigned thisRegister = currentInstruction[1].u.operand;
+ int callee = currentInstruction[2].u.operand;
+ RegisterID calleeReg = regT0;
+ RegisterID resultReg = regT0;
+ RegisterID allocatorReg = regT1;
+ RegisterID structureReg = regT2;
+ RegisterID scratchReg = regT3;
- emitLoad(thisRegister, regT1, regT0);
+ emitLoadPayload(callee, calleeReg);
+ loadPtr(Address(calleeReg, JSFunction::offsetOfAllocationProfile() + ObjectAllocationProfile::offsetOfAllocator()), allocatorReg);
+ loadPtr(Address(calleeReg, JSFunction::offsetOfAllocationProfile() + ObjectAllocationProfile::offsetOfStructure()), structureReg);
+ addSlowCase(branchTestPtr(Zero, allocatorReg));
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
+ emitAllocateJSObject(allocatorReg, structureReg, resultReg, scratchReg);
+ emitStoreCell(currentInstruction[1].u.operand, resultReg);
+}
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- addSlowCase(branchTest8(NonZero, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo.m_flags)), Imm32(NeedsThisConversion)));
+void JIT::emitSlow_op_create_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ linkSlowCase(iter); // doesn't have an allocation profile
+ linkSlowCase(iter); // allocation failed
- map(m_bytecodeIndex + OPCODE_LENGTH(op_convert_this), thisRegister, regT1, regT0);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_create_this);
+ slowPathCall.call();
}
-void JIT::emitSlow_op_convert_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emit_op_to_this(Instruction* currentInstruction)
{
- unsigned thisRegister = currentInstruction[1].u.operand;
+ WriteBarrierBase<Structure>* cachedStructure = ¤tInstruction[2].u.structure;
+ int thisRegister = currentInstruction[1].u.operand;
+
+ emitLoad(thisRegister, regT3, regT2);
+
+ addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::CellTag)));
+ addSlowCase(branch8(NotEqual, Address(regT2, JSCell::typeInfoTypeOffset()), TrustedImm32(FinalObjectType)));
+ loadPtr(Address(regT2, JSCell::structureIDOffset()), regT0);
+ loadPtr(cachedStructure, regT2);
+ addSlowCase(branchPtr(NotEqual, regT0, regT2));
+}
+void JIT::emitSlow_op_to_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
linkSlowCase(iter);
linkSlowCase(iter);
-
- JITStubCall stubCall(this, cti_op_convert_this);
- stubCall.addArgument(regT1, regT0);
- stubCall.call(thisRegister);
+ linkSlowCase(iter);
+ JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_to_this);
+ slowPathCall.call();
}
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);
+ load32(m_vm->enabledProfilerAddress(), regT0);
+ Jump profilerDone = branchTestPtr(Zero, regT0);
+ emitLoad(currentInstruction[1].u.operand, regT1, regT0);
+ callOperation(operationProfileWillCall, regT1, regT0);
+ profilerDone.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));
+ load32(m_vm->enabledProfilerAddress(), regT0);
+ Jump profilerDone = branchTestPtr(Zero, regT0);
+ emitLoad(currentInstruction[1].u.operand, regT1, regT0);
+ callOperation(operationProfileDidCall, regT1, regT0);
+ profilerDone.link(this);
+}
- 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(JSStack::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;
+ callOperation(operationGetArgumentsLength, dst, base);
+}
+
+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);
+ // regT2 now contains the integer index of the argument we want, including this
+ load32(payloadFor(JSStack::ArgumentCount), regT3);
+ addSlowCase(branch32(AboveOrEqual, regT2, regT3));
+
+ 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);
+ emitValueProfilingSite();
+ emitStore(dst, regT1, regT0);
}
-#endif // ENABLE(JIT) && USE(JSVALUE32_64)
+void JIT::emitSlow_op_get_argument_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ int dst = currentInstruction[1].u.operand;
+ int arguments = currentInstruction[2].u.operand;
+ int property = currentInstruction[3].u.operand;
+
+ linkSlowCase(iter);
+ Jump skipArgumentsCreation = jump();
+
+ linkSlowCase(iter);
+ linkSlowCase(iter);
+
+ callOperation(operationCreateArguments);
+ emitStoreCell(arguments, returnValueGPR);
+ emitStoreCell(unmodifiedArgumentsRegister(VirtualRegister(arguments)).offset(), returnValueGPR);
+
+ skipArgumentsCreation.link(this);
+ emitLoad(arguments, regT1, regT0);
+ emitLoad(property, regT3, regT2);
+ callOperation(WithProfile, operationGetByValGeneric, dst, regT1, regT0, regT3, regT2);
+}
+
+} // namespace JSC
+
+#endif // USE(JSVALUE32_64)
+#endif // ENABLE(JIT)
projects / apple / javascriptcore.git / blobdiff