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Diffstat (limited to 'Source/JavaScriptCore/jit/JITInlineMethods.h')
| -rw-r--r-- | Source/JavaScriptCore/jit/JITInlineMethods.h | 1001 |
1 files changed, 1001 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/jit/JITInlineMethods.h b/Source/JavaScriptCore/jit/JITInlineMethods.h new file mode 100644 index 000000000..410bdf710 --- /dev/null +++ b/Source/JavaScriptCore/jit/JITInlineMethods.h @@ -0,0 +1,1001 @@ +/* + * Copyright (C) 2008, 2012 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef JITInlineMethods_h +#define JITInlineMethods_h + + +#if ENABLE(JIT) + +namespace JSC { + +ALWAYS_INLINE bool JIT::isOperandConstantImmediateDouble(unsigned src) +{ + return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isDouble(); +} + +ALWAYS_INLINE JSValue JIT::getConstantOperand(unsigned src) +{ + ASSERT(m_codeBlock->isConstantRegisterIndex(src)); + return m_codeBlock->getConstant(src); +} + +ALWAYS_INLINE void JIT::emitPutCellToCallFrameHeader(RegisterID from, JSStack::CallFrameHeaderEntry entry) +{ +#if USE(JSVALUE32_64) + store32(TrustedImm32(JSValue::CellTag), tagFor(entry, callFrameRegister)); + store32(from, payloadFor(entry, callFrameRegister)); +#else + store64(from, addressFor(entry, callFrameRegister)); +#endif +} + +ALWAYS_INLINE void JIT::emitPutIntToCallFrameHeader(RegisterID from, JSStack::CallFrameHeaderEntry entry) +{ +#if USE(JSVALUE32_64) + store32(TrustedImm32(Int32Tag), intTagFor(entry, callFrameRegister)); + store32(from, intPayloadFor(entry, callFrameRegister)); +#else + store64(from, addressFor(entry, callFrameRegister)); +#endif +} + +ALWAYS_INLINE void JIT::emitPutToCallFrameHeader(RegisterID from, JSStack::CallFrameHeaderEntry entry) +{ +#if USE(JSVALUE32_64) + storePtr(from, payloadFor(entry, callFrameRegister)); +#else + store64(from, addressFor(entry, callFrameRegister)); +#endif +} + +ALWAYS_INLINE void JIT::emitPutImmediateToCallFrameHeader(void* value, JSStack::CallFrameHeaderEntry entry) +{ + storePtr(TrustedImmPtr(value), Address(callFrameRegister, entry * sizeof(Register))); +} + +ALWAYS_INLINE void JIT::emitGetFromCallFrameHeaderPtr(JSStack::CallFrameHeaderEntry entry, RegisterID to, RegisterID from) +{ + loadPtr(Address(from, entry * sizeof(Register)), to); +#if USE(JSVALUE64) + killLastResultRegister(); +#endif +} + +ALWAYS_INLINE void JIT::emitGetFromCallFrameHeader32(JSStack::CallFrameHeaderEntry entry, RegisterID to, RegisterID from) +{ + load32(Address(from, entry * sizeof(Register)), to); +#if USE(JSVALUE64) + killLastResultRegister(); +#endif +} + +#if USE(JSVALUE64) +ALWAYS_INLINE void JIT::emitGetFromCallFrameHeader64(JSStack::CallFrameHeaderEntry entry, RegisterID to, RegisterID from) +{ + load64(Address(from, entry * sizeof(Register)), to); + killLastResultRegister(); +} +#endif + +ALWAYS_INLINE void JIT::emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures) +{ + failures.append(branchPtr(NotEqual, Address(src, JSCell::structureOffset()), TrustedImmPtr(m_globalData->stringStructure.get()))); + failures.append(branch32(NotEqual, MacroAssembler::Address(src, ThunkHelpers::jsStringLengthOffset()), TrustedImm32(1))); + loadPtr(MacroAssembler::Address(src, ThunkHelpers::jsStringValueOffset()), dst); + failures.append(branchTest32(Zero, dst)); + loadPtr(MacroAssembler::Address(dst, ThunkHelpers::stringImplFlagsOffset()), regT1); + loadPtr(MacroAssembler::Address(dst, ThunkHelpers::stringImplDataOffset()), dst); + + JumpList is16Bit; + JumpList cont8Bit; + is16Bit.append(branchTest32(Zero, regT1, TrustedImm32(ThunkHelpers::stringImpl8BitFlag()))); + load8(MacroAssembler::Address(dst, 0), dst); + cont8Bit.append(jump()); + is16Bit.link(this); + load16(MacroAssembler::Address(dst, 0), dst); + cont8Bit.link(this); +} + +ALWAYS_INLINE JIT::Call JIT::emitNakedCall(CodePtr function) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + Call nakedCall = nearCall(); + m_calls.append(CallRecord(nakedCall, m_bytecodeOffset, function.executableAddress())); + return nakedCall; +} + +ALWAYS_INLINE bool JIT::atJumpTarget() +{ + while (m_jumpTargetsPosition < m_codeBlock->numberOfJumpTargets() && m_codeBlock->jumpTarget(m_jumpTargetsPosition) <= m_bytecodeOffset) { + if (m_codeBlock->jumpTarget(m_jumpTargetsPosition) == m_bytecodeOffset) + return true; + ++m_jumpTargetsPosition; + } + return false; +} + +#if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL + +ALWAYS_INLINE void JIT::beginUninterruptedSequence(int insnSpace, int constSpace) +{ +#if CPU(ARM_TRADITIONAL) +#ifndef NDEBUG + // Ensure the label after the sequence can also fit + insnSpace += sizeof(ARMWord); + constSpace += sizeof(uint64_t); +#endif + + ensureSpace(insnSpace, constSpace); + +#elif CPU(SH4) +#ifndef NDEBUG + insnSpace += sizeof(SH4Word); + constSpace += sizeof(uint64_t); +#endif + + m_assembler.ensureSpace(insnSpace + m_assembler.maxInstructionSize + 2, constSpace + 8); +#endif + +#if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL +#ifndef NDEBUG + m_uninterruptedInstructionSequenceBegin = label(); + m_uninterruptedConstantSequenceBegin = sizeOfConstantPool(); +#endif +#endif +} + +ALWAYS_INLINE void JIT::endUninterruptedSequence(int insnSpace, int constSpace, int dst) +{ + UNUSED_PARAM(dst); +#if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL + /* There are several cases when the uninterrupted sequence is larger than + * maximum required offset for pathing the same sequence. Eg.: if in a + * uninterrupted sequence the last macroassembler's instruction is a stub + * call, it emits store instruction(s) which should not be included in the + * calculation of length of uninterrupted sequence. So, the insnSpace and + * constSpace should be upper limit instead of hard limit. + */ +#if CPU(SH4) + if ((dst > 15) || (dst < -16)) { + insnSpace += 8; + constSpace += 2; + } + + if (((dst >= -16) && (dst < 0)) || ((dst > 7) && (dst <= 15))) + insnSpace += 8; +#endif + ASSERT(differenceBetween(m_uninterruptedInstructionSequenceBegin, label()) <= insnSpace); + ASSERT(sizeOfConstantPool() - m_uninterruptedConstantSequenceBegin <= constSpace); +#endif +} + +#endif + +#if CPU(ARM) + +ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg) +{ + move(linkRegister, reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg) +{ + move(reg, linkRegister); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address) +{ + loadPtr(address, linkRegister); +} +#elif CPU(SH4) + +ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg) +{ + m_assembler.stspr(reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg) +{ + m_assembler.ldspr(reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address) +{ + loadPtrLinkReg(address); +} + +#elif CPU(MIPS) + +ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg) +{ + move(returnAddressRegister, reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg) +{ + move(reg, returnAddressRegister); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address) +{ + loadPtr(address, returnAddressRegister); +} + +#else // CPU(X86) || CPU(X86_64) + +ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg) +{ + pop(reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg) +{ + push(reg); +} + +ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address) +{ + push(address); +} + +#endif + +ALWAYS_INLINE void JIT::restoreArgumentReference() +{ + move(stackPointerRegister, firstArgumentRegister); + poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*)); +} + +ALWAYS_INLINE void JIT::updateTopCallFrame() +{ + ASSERT(static_cast<int>(m_bytecodeOffset) >= 0); + if (m_bytecodeOffset) { +#if USE(JSVALUE32_64) + storePtr(TrustedImmPtr(m_codeBlock->instructions().begin() + m_bytecodeOffset + 1), intTagFor(JSStack::ArgumentCount)); +#else + store32(TrustedImm32(m_bytecodeOffset + 1), intTagFor(JSStack::ArgumentCount)); +#endif + } + storePtr(callFrameRegister, &m_globalData->topCallFrame); +} + +ALWAYS_INLINE void JIT::restoreArgumentReferenceForTrampoline() +{ +#if CPU(X86) + // Within a trampoline the return address will be on the stack at this point. + addPtr(TrustedImm32(sizeof(void*)), stackPointerRegister, firstArgumentRegister); +#elif CPU(ARM) + move(stackPointerRegister, firstArgumentRegister); +#elif CPU(SH4) + move(stackPointerRegister, firstArgumentRegister); +#endif + // In the trampoline on x86-64, the first argument register is not overwritten. +} + +ALWAYS_INLINE JIT::Jump JIT::checkStructure(RegisterID reg, Structure* structure) +{ + return branchPtr(NotEqual, Address(reg, JSCell::structureOffset()), TrustedImmPtr(structure)); +} + +ALWAYS_INLINE void JIT::linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator& iter, int vReg) +{ + if (!m_codeBlock->isKnownNotImmediate(vReg)) + linkSlowCase(iter); +} + +ALWAYS_INLINE void JIT::addSlowCase(Jump jump) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + m_slowCases.append(SlowCaseEntry(jump, m_bytecodeOffset)); +} + +ALWAYS_INLINE void JIT::addSlowCase(JumpList jumpList) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + const JumpList::JumpVector& jumpVector = jumpList.jumps(); + size_t size = jumpVector.size(); + for (size_t i = 0; i < size; ++i) + m_slowCases.append(SlowCaseEntry(jumpVector[i], m_bytecodeOffset)); +} + +ALWAYS_INLINE void JIT::addSlowCase() +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + Jump emptyJump; // Doing it this way to make Windows happy. + m_slowCases.append(SlowCaseEntry(emptyJump, m_bytecodeOffset)); +} + +ALWAYS_INLINE void JIT::addJump(Jump jump, int relativeOffset) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + m_jmpTable.append(JumpTable(jump, m_bytecodeOffset + relativeOffset)); +} + +ALWAYS_INLINE void JIT::emitJumpSlowToHot(Jump jump, int relativeOffset) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + jump.linkTo(m_labels[m_bytecodeOffset + relativeOffset], this); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotObject(RegisterID structureReg) +{ + return branch8(Below, Address(structureReg, Structure::typeInfoTypeOffset()), TrustedImm32(ObjectType)); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotType(RegisterID baseReg, RegisterID scratchReg, JSType type) +{ + loadPtr(Address(baseReg, JSCell::structureOffset()), scratchReg); + return branch8(NotEqual, Address(scratchReg, Structure::typeInfoTypeOffset()), TrustedImm32(type)); +} + +#if ENABLE(SAMPLING_FLAGS) +ALWAYS_INLINE void JIT::setSamplingFlag(int32_t flag) +{ + ASSERT(flag >= 1); + ASSERT(flag <= 32); + or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags())); +} + +ALWAYS_INLINE void JIT::clearSamplingFlag(int32_t flag) +{ + ASSERT(flag >= 1); + ASSERT(flag <= 32); + and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags())); +} +#endif + +#if ENABLE(SAMPLING_COUNTERS) +ALWAYS_INLINE void JIT::emitCount(AbstractSamplingCounter& counter, int32_t count) +{ + add64(TrustedImm32(count), AbsoluteAddress(counter.addressOfCounter())); +} +#endif + +#if ENABLE(OPCODE_SAMPLING) +#if CPU(X86_64) +ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostFunction) +{ + move(TrustedImmPtr(m_interpreter->sampler()->sampleSlot()), X86Registers::ecx); + storePtr(TrustedImmPtr(m_interpreter->sampler()->encodeSample(instruction, inHostFunction)), X86Registers::ecx); +} +#else +ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostFunction) +{ + storePtr(TrustedImmPtr(m_interpreter->sampler()->encodeSample(instruction, inHostFunction)), m_interpreter->sampler()->sampleSlot()); +} +#endif +#endif + +#if ENABLE(CODEBLOCK_SAMPLING) +#if CPU(X86_64) +ALWAYS_INLINE void JIT::sampleCodeBlock(CodeBlock* codeBlock) +{ + move(TrustedImmPtr(m_interpreter->sampler()->codeBlockSlot()), X86Registers::ecx); + storePtr(TrustedImmPtr(codeBlock), X86Registers::ecx); +} +#else +ALWAYS_INLINE void JIT::sampleCodeBlock(CodeBlock* codeBlock) +{ + storePtr(TrustedImmPtr(codeBlock), m_interpreter->sampler()->codeBlockSlot()); +} +#endif +#endif + +ALWAYS_INLINE bool JIT::isOperandConstantImmediateChar(unsigned src) +{ + return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isString() && asString(getConstantOperand(src).asCell())->length() == 1; +} + +template <typename ClassType, MarkedBlock::DestructorType destructorType, typename StructureType> inline void JIT::emitAllocateBasicJSObject(StructureType structure, RegisterID result, RegisterID storagePtr) +{ + size_t size = ClassType::allocationSize(INLINE_STORAGE_CAPACITY); + MarkedAllocator* allocator = 0; + if (destructorType == MarkedBlock::Normal) + allocator = &m_globalData->heap.allocatorForObjectWithNormalDestructor(size); + else if (destructorType == MarkedBlock::ImmortalStructure) + allocator = &m_globalData->heap.allocatorForObjectWithImmortalStructureDestructor(size); + else + allocator = &m_globalData->heap.allocatorForObjectWithoutDestructor(size); + loadPtr(&allocator->m_freeList.head, result); + addSlowCase(branchTestPtr(Zero, result)); + + // remove the object from the free list + loadPtr(Address(result), storagePtr); + storePtr(storagePtr, &allocator->m_freeList.head); + + // initialize the object's structure + storePtr(structure, Address(result, JSCell::structureOffset())); + + // initialize the object's property storage pointer + storePtr(TrustedImmPtr(0), Address(result, JSObject::butterflyOffset())); +} + +template <typename T> inline void JIT::emitAllocateJSFinalObject(T structure, RegisterID result, RegisterID scratch) +{ + emitAllocateBasicJSObject<JSFinalObject, MarkedBlock::None, T>(structure, result, scratch); +} + +#if ENABLE(VALUE_PROFILER) +inline void JIT::emitValueProfilingSite(ValueProfile* valueProfile) +{ + ASSERT(shouldEmitProfiling()); + ASSERT(valueProfile); + + const RegisterID value = regT0; +#if USE(JSVALUE32_64) + const RegisterID valueTag = regT1; +#endif + const RegisterID scratch = regT3; + + if (ValueProfile::numberOfBuckets == 1) { + // We're in a simple configuration: only one bucket, so we can just do a direct + // store. +#if USE(JSVALUE64) + store64(value, valueProfile->m_buckets); +#else + EncodedValueDescriptor* descriptor = bitwise_cast<EncodedValueDescriptor*>(valueProfile->m_buckets); + store32(value, &descriptor->asBits.payload); + store32(valueTag, &descriptor->asBits.tag); +#endif + return; + } + + if (m_randomGenerator.getUint32() & 1) + add32(TrustedImm32(1), bucketCounterRegister); + else + add32(TrustedImm32(3), bucketCounterRegister); + and32(TrustedImm32(ValueProfile::bucketIndexMask), bucketCounterRegister); + move(TrustedImmPtr(valueProfile->m_buckets), scratch); +#if USE(JSVALUE64) + store64(value, BaseIndex(scratch, bucketCounterRegister, TimesEight)); +#elif USE(JSVALUE32_64) + store32(value, BaseIndex(scratch, bucketCounterRegister, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload))); + store32(valueTag, BaseIndex(scratch, bucketCounterRegister, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag))); +#endif +} + +inline void JIT::emitValueProfilingSite(unsigned bytecodeOffset) +{ + if (!shouldEmitProfiling()) + return; + emitValueProfilingSite(m_codeBlock->valueProfileForBytecodeOffset(bytecodeOffset)); +} + +inline void JIT::emitValueProfilingSite() +{ + emitValueProfilingSite(m_bytecodeOffset); +} +#endif // ENABLE(VALUE_PROFILER) + +inline void JIT::emitArrayProfilingSite(RegisterID structureAndIndexingType, RegisterID scratch, ArrayProfile* arrayProfile) +{ + UNUSED_PARAM(scratch); // We had found this scratch register useful here before, so I will keep it for now. + + RegisterID structure = structureAndIndexingType; + RegisterID indexingType = structureAndIndexingType; + + if (canBeOptimized()) + storePtr(structure, arrayProfile->addressOfLastSeenStructure()); + + load8(Address(structure, Structure::indexingTypeOffset()), indexingType); +} + +inline void JIT::emitArrayProfilingSiteForBytecodeIndex(RegisterID structureAndIndexingType, RegisterID scratch, unsigned bytecodeIndex) +{ +#if ENABLE(VALUE_PROFILER) + emitArrayProfilingSite(structureAndIndexingType, scratch, m_codeBlock->getOrAddArrayProfile(bytecodeIndex)); +#else + UNUSED_PARAM(bytecodeIndex); + emitArrayProfilingSite(structureAndIndexingType, scratch, 0); +#endif +} + +inline void JIT::emitArrayProfileStoreToHoleSpecialCase(ArrayProfile* arrayProfile) +{ +#if ENABLE(VALUE_PROFILER) + store8(TrustedImm32(1), arrayProfile->addressOfMayStoreToHole()); +#else + UNUSED_PARAM(arrayProfile); +#endif +} + +static inline bool arrayProfileSaw(ArrayProfile* profile, IndexingType capability) +{ +#if ENABLE(VALUE_PROFILER) + return !!(profile->observedArrayModes() & (asArrayModes(NonArray | capability) | asArrayModes(ArrayClass | capability))); +#else + UNUSED_PARAM(profile); + UNUSED_PARAM(capability); + return false; +#endif +} + +inline JITArrayMode JIT::chooseArrayMode(ArrayProfile* profile) +{ + if (arrayProfileSaw(profile, ArrayStorageShape)) + return JITArrayStorage; + return JITContiguous; +} + +#if USE(JSVALUE32_64) + +inline void JIT::emitLoadTag(int index, RegisterID tag) +{ + RegisterID mappedTag; + if (getMappedTag(index, mappedTag)) { + move(mappedTag, tag); + unmap(tag); + return; + } + + if (m_codeBlock->isConstantRegisterIndex(index)) { + move(Imm32(getConstantOperand(index).tag()), tag); + unmap(tag); + return; + } + + load32(tagFor(index), tag); + unmap(tag); +} + +inline void JIT::emitLoadPayload(int index, RegisterID payload) +{ + RegisterID mappedPayload; + if (getMappedPayload(index, mappedPayload)) { + move(mappedPayload, payload); + unmap(payload); + return; + } + + if (m_codeBlock->isConstantRegisterIndex(index)) { + move(Imm32(getConstantOperand(index).payload()), payload); + unmap(payload); + return; + } + + load32(payloadFor(index), payload); + unmap(payload); +} + +inline void JIT::emitLoad(const JSValue& v, RegisterID tag, RegisterID payload) +{ + move(Imm32(v.payload()), payload); + move(Imm32(v.tag()), tag); +} + +inline void JIT::emitLoad(int index, RegisterID tag, RegisterID payload, RegisterID base) +{ + ASSERT(tag != payload); + + if (base == callFrameRegister) { + ASSERT(payload != base); + emitLoadPayload(index, payload); + emitLoadTag(index, tag); + return; + } + + if (payload == base) { // avoid stomping base + load32(tagFor(index, base), tag); + load32(payloadFor(index, base), payload); + return; + } + + load32(payloadFor(index, base), payload); + load32(tagFor(index, base), tag); +} + +inline void JIT::emitLoad2(int index1, RegisterID tag1, RegisterID payload1, int index2, RegisterID tag2, RegisterID payload2) +{ + if (isMapped(index1)) { + emitLoad(index1, tag1, payload1); + emitLoad(index2, tag2, payload2); + return; + } + emitLoad(index2, tag2, payload2); + emitLoad(index1, tag1, payload1); +} + +inline void JIT::emitLoadDouble(int index, FPRegisterID value) +{ + if (m_codeBlock->isConstantRegisterIndex(index)) { + WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index); + loadDouble(&inConstantPool, value); + } else + loadDouble(addressFor(index), value); +} + +inline void JIT::emitLoadInt32ToDouble(int index, FPRegisterID value) +{ + if (m_codeBlock->isConstantRegisterIndex(index)) { + WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index); + char* bytePointer = reinterpret_cast<char*>(&inConstantPool); + convertInt32ToDouble(AbsoluteAddress(bytePointer + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), value); + } else + convertInt32ToDouble(payloadFor(index), value); +} + +inline void JIT::emitStore(int index, RegisterID tag, RegisterID payload, RegisterID base) +{ + store32(payload, payloadFor(index, base)); + store32(tag, tagFor(index, base)); +} + +inline void JIT::emitStoreInt32(int index, RegisterID payload, bool indexIsInt32) +{ + store32(payload, payloadFor(index, callFrameRegister)); + if (!indexIsInt32) + store32(TrustedImm32(JSValue::Int32Tag), tagFor(index, callFrameRegister)); +} + +inline void JIT::emitStoreAndMapInt32(int index, RegisterID tag, RegisterID payload, bool indexIsInt32, size_t opcodeLength) +{ + emitStoreInt32(index, payload, indexIsInt32); + map(m_bytecodeOffset + opcodeLength, index, tag, payload); +} + +inline void JIT::emitStoreInt32(int index, TrustedImm32 payload, bool indexIsInt32) +{ + store32(payload, payloadFor(index, callFrameRegister)); + if (!indexIsInt32) + store32(TrustedImm32(JSValue::Int32Tag), tagFor(index, callFrameRegister)); +} + +inline void JIT::emitStoreCell(int index, RegisterID payload, bool indexIsCell) +{ + store32(payload, payloadFor(index, callFrameRegister)); + if (!indexIsCell) + store32(TrustedImm32(JSValue::CellTag), tagFor(index, callFrameRegister)); +} + +inline void JIT::emitStoreBool(int index, RegisterID payload, bool indexIsBool) +{ + store32(payload, payloadFor(index, callFrameRegister)); + if (!indexIsBool) + store32(TrustedImm32(JSValue::BooleanTag), tagFor(index, callFrameRegister)); +} + +inline void JIT::emitStoreDouble(int index, FPRegisterID value) +{ + storeDouble(value, addressFor(index)); +} + +inline void JIT::emitStore(int index, const JSValue constant, RegisterID base) +{ + store32(Imm32(constant.payload()), payloadFor(index, base)); + store32(Imm32(constant.tag()), tagFor(index, base)); +} + +ALWAYS_INLINE void JIT::emitInitRegister(unsigned dst) +{ + emitStore(dst, jsUndefined()); +} + +inline bool JIT::isLabeled(unsigned bytecodeOffset) +{ + for (size_t numberOfJumpTargets = m_codeBlock->numberOfJumpTargets(); m_jumpTargetIndex != numberOfJumpTargets; ++m_jumpTargetIndex) { + unsigned jumpTarget = m_codeBlock->jumpTarget(m_jumpTargetIndex); + if (jumpTarget == bytecodeOffset) + return true; + if (jumpTarget > bytecodeOffset) + return false; + } + return false; +} + +inline void JIT::map(unsigned bytecodeOffset, int virtualRegisterIndex, RegisterID tag, RegisterID payload) +{ + if (isLabeled(bytecodeOffset)) + return; + + m_mappedBytecodeOffset = bytecodeOffset; + m_mappedVirtualRegisterIndex = virtualRegisterIndex; + m_mappedTag = tag; + m_mappedPayload = payload; + + ASSERT(!canBeOptimized() || m_mappedPayload == regT0); + ASSERT(!canBeOptimized() || m_mappedTag == regT1); +} + +inline void JIT::unmap(RegisterID registerID) +{ + if (m_mappedTag == registerID) + m_mappedTag = (RegisterID)-1; + else if (m_mappedPayload == registerID) + m_mappedPayload = (RegisterID)-1; +} + +inline void JIT::unmap() +{ + m_mappedBytecodeOffset = (unsigned)-1; + m_mappedVirtualRegisterIndex = JSStack::ReturnPC; + m_mappedTag = (RegisterID)-1; + m_mappedPayload = (RegisterID)-1; +} + +inline bool JIT::isMapped(int virtualRegisterIndex) +{ + if (m_mappedBytecodeOffset != m_bytecodeOffset) + return false; + if (m_mappedVirtualRegisterIndex != virtualRegisterIndex) + return false; + return true; +} + +inline bool JIT::getMappedPayload(int virtualRegisterIndex, RegisterID& payload) +{ + if (m_mappedBytecodeOffset != m_bytecodeOffset) + return false; + if (m_mappedVirtualRegisterIndex != virtualRegisterIndex) + return false; + if (m_mappedPayload == (RegisterID)-1) + return false; + payload = m_mappedPayload; + return true; +} + +inline bool JIT::getMappedTag(int virtualRegisterIndex, RegisterID& tag) +{ + if (m_mappedBytecodeOffset != m_bytecodeOffset) + return false; + if (m_mappedVirtualRegisterIndex != virtualRegisterIndex) + return false; + if (m_mappedTag == (RegisterID)-1) + return false; + tag = m_mappedTag; + return true; +} + +inline void JIT::emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex) +{ + if (!m_codeBlock->isKnownNotImmediate(virtualRegisterIndex)) { + if (m_codeBlock->isConstantRegisterIndex(virtualRegisterIndex)) + addSlowCase(jump()); + else + addSlowCase(emitJumpIfNotJSCell(virtualRegisterIndex)); + } +} + +inline void JIT::emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex, RegisterID tag) +{ + if (!m_codeBlock->isKnownNotImmediate(virtualRegisterIndex)) { + if (m_codeBlock->isConstantRegisterIndex(virtualRegisterIndex)) + addSlowCase(jump()); + else + addSlowCase(branch32(NotEqual, tag, TrustedImm32(JSValue::CellTag))); + } +} + +ALWAYS_INLINE bool JIT::isOperandConstantImmediateInt(unsigned src) +{ + return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isInt32(); +} + +ALWAYS_INLINE bool JIT::getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant) +{ + if (isOperandConstantImmediateInt(op1)) { + constant = getConstantOperand(op1).asInt32(); + op = op2; + return true; + } + + if (isOperandConstantImmediateInt(op2)) { + constant = getConstantOperand(op2).asInt32(); + op = op1; + return true; + } + + return false; +} + +#else // USE(JSVALUE32_64) + +/* Deprecated: Please use JITStubCall instead. */ + +ALWAYS_INLINE void JIT::emitGetJITStubArg(unsigned argumentNumber, RegisterID dst) +{ + unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX; + peek64(dst, argumentStackOffset); +} + +ALWAYS_INLINE void JIT::killLastResultRegister() +{ + m_lastResultBytecodeRegister = std::numeric_limits<int>::max(); +} + +// get arg puts an arg from the SF register array into a h/w register +ALWAYS_INLINE void JIT::emitGetVirtualRegister(int src, RegisterID dst) +{ + ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set. + + // TODO: we want to reuse values that are already in registers if we can - add a register allocator! + if (m_codeBlock->isConstantRegisterIndex(src)) { + JSValue value = m_codeBlock->getConstant(src); + if (!value.isNumber()) + move(TrustedImm64(JSValue::encode(value)), dst); + else + move(Imm64(JSValue::encode(value)), dst); + killLastResultRegister(); + return; + } + + if (src == m_lastResultBytecodeRegister && m_codeBlock->isTemporaryRegisterIndex(src) && !atJumpTarget()) { + // The argument we want is already stored in eax + if (dst != cachedResultRegister) + move(cachedResultRegister, dst); + killLastResultRegister(); + return; + } + + load64(Address(callFrameRegister, src * sizeof(Register)), dst); + killLastResultRegister(); +} + +ALWAYS_INLINE void JIT::emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2) +{ + if (src2 == m_lastResultBytecodeRegister) { + emitGetVirtualRegister(src2, dst2); + emitGetVirtualRegister(src1, dst1); + } else { + emitGetVirtualRegister(src1, dst1); + emitGetVirtualRegister(src2, dst2); + } +} + +ALWAYS_INLINE int32_t JIT::getConstantOperandImmediateInt(unsigned src) +{ + return getConstantOperand(src).asInt32(); +} + +ALWAYS_INLINE bool JIT::isOperandConstantImmediateInt(unsigned src) +{ + return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isInt32(); +} + +ALWAYS_INLINE void JIT::emitPutVirtualRegister(unsigned dst, RegisterID from) +{ + store64(from, Address(callFrameRegister, dst * sizeof(Register))); + m_lastResultBytecodeRegister = (from == cachedResultRegister) ? static_cast<int>(dst) : std::numeric_limits<int>::max(); +} + +ALWAYS_INLINE void JIT::emitInitRegister(unsigned dst) +{ + store64(TrustedImm64(JSValue::encode(jsUndefined())), Address(callFrameRegister, dst * sizeof(Register))); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfJSCell(RegisterID reg) +{ + return branchTest64(Zero, reg, tagMaskRegister); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfBothJSCells(RegisterID reg1, RegisterID reg2, RegisterID scratch) +{ + move(reg1, scratch); + or64(reg2, scratch); + return emitJumpIfJSCell(scratch); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfJSCell(RegisterID reg) +{ + addSlowCase(emitJumpIfJSCell(reg)); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotJSCell(RegisterID reg) +{ + return branchTest64(NonZero, reg, tagMaskRegister); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotJSCell(RegisterID reg) +{ + addSlowCase(emitJumpIfNotJSCell(reg)); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotJSCell(RegisterID reg, int vReg) +{ + if (!m_codeBlock->isKnownNotImmediate(vReg)) + emitJumpSlowCaseIfNotJSCell(reg); +} + +inline void JIT::emitLoadDouble(int index, FPRegisterID value) +{ + if (m_codeBlock->isConstantRegisterIndex(index)) { + WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index); + loadDouble(&inConstantPool, value); + } else + loadDouble(addressFor(index), value); +} + +inline void JIT::emitLoadInt32ToDouble(int index, FPRegisterID value) +{ + if (m_codeBlock->isConstantRegisterIndex(index)) { + ASSERT(isOperandConstantImmediateInt(index)); + convertInt32ToDouble(Imm32(getConstantOperand(index).asInt32()), value); + } else + convertInt32ToDouble(addressFor(index), value); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfImmediateInteger(RegisterID reg) +{ + return branch64(AboveOrEqual, reg, tagTypeNumberRegister); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotImmediateInteger(RegisterID reg) +{ + return branch64(Below, reg, tagTypeNumberRegister); +} + +ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotImmediateIntegers(RegisterID reg1, RegisterID reg2, RegisterID scratch) +{ + move(reg1, scratch); + and64(reg2, scratch); + return emitJumpIfNotImmediateInteger(scratch); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateInteger(RegisterID reg) +{ + addSlowCase(emitJumpIfNotImmediateInteger(reg)); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateIntegers(RegisterID reg1, RegisterID reg2, RegisterID scratch) +{ + addSlowCase(emitJumpIfNotImmediateIntegers(reg1, reg2, scratch)); +} + +ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateNumber(RegisterID reg) +{ + addSlowCase(emitJumpIfNotImmediateNumber(reg)); +} + +ALWAYS_INLINE void JIT::emitFastArithReTagImmediate(RegisterID src, RegisterID dest) +{ + emitFastArithIntToImmNoCheck(src, dest); +} + +// operand is int32_t, must have been zero-extended if register is 64-bit. +ALWAYS_INLINE void JIT::emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest) +{ + if (src != dest) + move(src, dest); + or64(tagTypeNumberRegister, dest); +} + +ALWAYS_INLINE void JIT::emitTagAsBoolImmediate(RegisterID reg) +{ + or32(TrustedImm32(static_cast<int32_t>(ValueFalse)), reg); +} + +#endif // USE(JSVALUE32_64) + +} // namespace JSC + +#endif // ENABLE(JIT) + +#endif |