| /* |
| * Copyright (C) 2015 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 WASMFunctionCompiler_h |
| #define WASMFunctionCompiler_h |
| |
| #if ENABLE(WEBASSEMBLY) |
| |
| #include "BinarySwitch.h" |
| #include "CCallHelpers.h" |
| #include "JIT.h" |
| #include "JITOperations.h" |
| #include "LinkBuffer.h" |
| #include "MaxFrameExtentForSlowPathCall.h" |
| |
| #define UNUSED 0 |
| |
| namespace JSC { |
| |
| static int32_t JIT_OPERATION operationConvertJSValueToInt32(ExecState* exec, EncodedJSValue value) |
| { |
| return JSValue::decode(value).toInt32(exec); |
| } |
| |
| static double JIT_OPERATION operationConvertJSValueToDouble(ExecState* exec, EncodedJSValue value) |
| { |
| return JSValue::decode(value).toNumber(exec); |
| } |
| |
| #if !CPU(X86) && !CPU(X86_64) |
| static int32_t JIT_OPERATION operationDiv(int32_t left, int32_t right) |
| { |
| return left / right; |
| } |
| |
| static int32_t JIT_OPERATION operationMod(int32_t left, int32_t right) |
| { |
| return left % right; |
| } |
| |
| static uint32_t JIT_OPERATION operationUnsignedDiv(uint32_t left, uint32_t right) |
| { |
| return left / right; |
| } |
| |
| static uint32_t JIT_OPERATION operationUnsignedMod(uint32_t left, uint32_t right) |
| { |
| return left % right; |
| } |
| #endif |
| |
| class WASMFunctionCompiler : private CCallHelpers { |
| public: |
| typedef int Expression; |
| typedef int Statement; |
| typedef int ExpressionList; |
| struct JumpTarget { |
| Label label; |
| JumpList jumpList; |
| }; |
| enum class JumpCondition { Zero, NonZero }; |
| |
| WASMFunctionCompiler(VM& vm, CodeBlock* codeBlock, JSWASMModule* module, unsigned stackHeight) |
| : CCallHelpers(&vm, codeBlock) |
| , m_module(module) |
| , m_stackHeight(stackHeight) |
| { |
| } |
| |
| void startFunction(const Vector<WASMType>& arguments, uint32_t numberOfI32LocalVariables, uint32_t numberOfF32LocalVariables, uint32_t numberOfF64LocalVariables) |
| { |
| emitFunctionPrologue(); |
| emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock); |
| |
| m_beginLabel = label(); |
| |
| addPtr(TrustedImm32(-WTF::roundUpToMultipleOf(stackAlignmentRegisters(), m_stackHeight) * sizeof(StackSlot) - maxFrameExtentForSlowPathCall), GPRInfo::callFrameRegister, GPRInfo::regT1); |
| m_stackOverflow = branchPtr(Above, AbsoluteAddress(m_vm->addressOfStackLimit()), GPRInfo::regT1); |
| |
| move(GPRInfo::regT1, stackPointerRegister); |
| checkStackPointerAlignment(); |
| |
| m_numberOfLocals = arguments.size() + numberOfI32LocalVariables + numberOfF32LocalVariables + numberOfF64LocalVariables; |
| |
| unsigned localIndex = 0; |
| for (size_t i = 0; i < arguments.size(); ++i) { |
| Address address(GPRInfo::callFrameRegister, CallFrame::argumentOffset(i) * sizeof(Register)); |
| switch (arguments[i]) { |
| case WASMType::I32: |
| #if USE(JSVALUE64) |
| loadValueAndConvertToInt32(address, GPRInfo::regT0); |
| #else |
| loadValueAndConvertToInt32(address, GPRInfo::regT0, GPRInfo::regT1); |
| #endif |
| store32(GPRInfo::regT0, localAddress(localIndex++)); |
| break; |
| case WASMType::F32: |
| case WASMType::F64: |
| #if USE(JSVALUE64) |
| loadValueAndConvertToDouble(address, FPRInfo::fpRegT0, GPRInfo::regT0, GPRInfo::regT1); |
| #else |
| loadValueAndConvertToDouble(address, FPRInfo::fpRegT0, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT2, FPRInfo::fpRegT1); |
| #endif |
| if (arguments[i] == WASMType::F32) |
| convertDoubleToFloat(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| storeDouble(FPRInfo::fpRegT0, localAddress(localIndex++)); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| for (uint32_t i = 0; i < numberOfI32LocalVariables; ++i) |
| store32(TrustedImm32(0), localAddress(localIndex++)); |
| for (uint32_t i = 0; i < numberOfF32LocalVariables; ++i) |
| store32(TrustedImm32(0), localAddress(localIndex++)); |
| for (uint32_t i = 0; i < numberOfF64LocalVariables; ++i) |
| store64(TrustedImm64(0), localAddress(localIndex++)); |
| |
| m_codeBlock->setNumParameters(1 + arguments.size()); |
| } |
| |
| void endFunction() |
| { |
| ASSERT(!m_tempStackTop); |
| |
| // FIXME: Remove these if the last statement is a return statement. |
| move(TrustedImm64(JSValue::encode(jsUndefined())), GPRInfo::returnValueGPR); |
| emitFunctionEpilogue(); |
| ret(); |
| |
| m_stackOverflow.link(this); |
| if (maxFrameExtentForSlowPathCall) |
| addPtr(TrustedImm32(-maxFrameExtentForSlowPathCall), stackPointerRegister); |
| setupArgumentsWithExecState(TrustedImmPtr(m_codeBlock)); |
| appendCallWithExceptionCheck(operationThrowStackOverflowError); |
| |
| // FIXME: Implement arity check. |
| Label arityCheck = label(); |
| emitFunctionPrologue(); |
| emitPutImmediateToCallFrameHeader(m_codeBlock, JSStack::CodeBlock); |
| jump(m_beginLabel); |
| |
| if (!m_divideErrorJumpList.empty()) { |
| m_divideErrorJumpList.link(this); |
| |
| setupArgumentsExecState(); |
| appendCallWithExceptionCheck(operationThrowDivideError); |
| } |
| |
| if (!m_exceptionChecks.empty()) { |
| m_exceptionChecks.link(this); |
| |
| // lookupExceptionHandler is passed two arguments, the VM and the exec (the CallFrame*). |
| move(TrustedImmPtr(vm()), GPRInfo::argumentGPR0); |
| move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR1); |
| |
| #if CPU(X86) |
| // FIXME: should use the call abstraction, but this is currently in the SpeculativeJIT layer! |
| poke(GPRInfo::argumentGPR0); |
| poke(GPRInfo::argumentGPR1, 1); |
| #endif |
| m_calls.append(std::make_pair(call(), FunctionPtr(lookupExceptionHandlerFromCallerFrame).value())); |
| jumpToExceptionHandler(); |
| } |
| |
| LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock, JITCompilationMustSucceed); |
| |
| for (const auto& iterator : m_calls) |
| patchBuffer.link(iterator.first, FunctionPtr(iterator.second)); |
| |
| for (size_t i = 0; i < m_callCompilationInfo.size(); ++i) { |
| CallCompilationInfo& compilationInfo = m_callCompilationInfo[i]; |
| CallLinkInfo& info = *compilationInfo.callLinkInfo; |
| info.setCallLocations(patchBuffer.locationOfNearCall(compilationInfo.callReturnLocation), |
| patchBuffer.locationOf(compilationInfo.hotPathBegin), |
| patchBuffer.locationOfNearCall(compilationInfo.hotPathOther)); |
| } |
| |
| MacroAssemblerCodePtr withArityCheck = patchBuffer.locationOf(arityCheck); |
| CodeRef result = FINALIZE_CODE(patchBuffer, ("Baseline JIT code for WebAssembly")); |
| m_codeBlock->setJITCode(adoptRef(new DirectJITCode(result, withArityCheck, JITCode::BaselineJIT))); |
| m_codeBlock->capabilityLevel(); |
| } |
| |
| void buildSetLocal(uint32_t localIndex, int, WASMType type) |
| { |
| switch (type) { |
| case WASMType::I32: |
| case WASMType::F32: |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT0); |
| m_tempStackTop--; |
| store32(GPRInfo::regT0, localAddress(localIndex)); |
| break; |
| case WASMType::F64: |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT0); |
| m_tempStackTop--; |
| storeDouble(FPRInfo::fpRegT0, localAddress(localIndex)); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| void buildSetGlobal(uint32_t globalIndex, int, WASMType type) |
| { |
| move(TrustedImmPtr(&m_module->globalVariables()[globalIndex]), GPRInfo::regT0); |
| switch (type) { |
| case WASMType::I32: |
| case WASMType::F32: |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT1); |
| store32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMType::F64: |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT0); |
| storeDouble(FPRInfo::fpRegT0, GPRInfo::regT0); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| m_tempStackTop--; |
| } |
| |
| void buildReturn(int, WASMExpressionType returnType) |
| { |
| switch (returnType) { |
| case WASMExpressionType::I32: |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::returnValueGPR); |
| #if USE(JSVALUE64) |
| or64(GPRInfo::tagTypeNumberRegister, GPRInfo::returnValueGPR); |
| #else |
| move(TrustedImm32(JSValue::Int32Tag), GPRInfo::returnValueGPR2); |
| #endif |
| m_tempStackTop--; |
| break; |
| case WASMExpressionType::F32: |
| case WASMExpressionType::F64: |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT0); |
| if (returnType == WASMExpressionType::F32) |
| convertFloatToDouble(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| #if USE(JSVALUE64) |
| boxDouble(FPRInfo::fpRegT0, GPRInfo::returnValueGPR); |
| #else |
| boxDouble(FPRInfo::fpRegT0, GPRInfo::returnValueGPR2, GPRInfo::returnValueGPR); |
| #endif |
| m_tempStackTop--; |
| break; |
| case WASMExpressionType::Void: |
| move(TrustedImm64(JSValue::encode(jsUndefined())), GPRInfo::returnValueGPR); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| emitFunctionEpilogue(); |
| ret(); |
| } |
| |
| int buildImmediateI32(uint32_t immediate) |
| { |
| store32(Imm32(immediate), temporaryAddress(m_tempStackTop++)); |
| return UNUSED; |
| } |
| |
| int buildImmediateF32(float immediate) |
| { |
| store32(Imm32(bitwise_cast<int32_t>(immediate)), temporaryAddress(m_tempStackTop++)); |
| return UNUSED; |
| } |
| |
| int buildImmediateF64(double immediate) |
| { |
| #if USE(JSVALUE64) |
| store64(Imm64(bitwise_cast<int64_t>(immediate)), temporaryAddress(m_tempStackTop++)); |
| #else |
| union { |
| double doubleValue; |
| int32_t int32Values[2]; |
| } u = { immediate }; |
| m_tempStackTop++; |
| store32(Imm32(u.int32Values[0]), temporaryAddress(m_tempStackTop - 1)); |
| store32(Imm32(u.int32Values[1]), temporaryAddress(m_tempStackTop - 1).withOffset(4)); |
| #endif |
| return UNUSED; |
| } |
| |
| int buildGetLocal(uint32_t localIndex, WASMType type) |
| { |
| switch (type) { |
| case WASMType::I32: |
| case WASMType::F32: |
| load32(localAddress(localIndex), GPRInfo::regT0); |
| store32(GPRInfo::regT0, temporaryAddress(m_tempStackTop++)); |
| break; |
| case WASMType::F64: |
| loadDouble(localAddress(localIndex), FPRInfo::fpRegT0); |
| storeDouble(FPRInfo::fpRegT0, temporaryAddress(m_tempStackTop++)); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| return UNUSED; |
| } |
| |
| int buildGetGlobal(uint32_t globalIndex, WASMType type) |
| { |
| move(TrustedImmPtr(&m_module->globalVariables()[globalIndex]), GPRInfo::regT0); |
| switch (type) { |
| case WASMType::I32: |
| case WASMType::F32: |
| load32(GPRInfo::regT0, GPRInfo::regT0); |
| store32(GPRInfo::regT0, temporaryAddress(m_tempStackTop++)); |
| break; |
| case WASMType::F64: |
| loadDouble(GPRInfo::regT0, FPRInfo::fpRegT0); |
| storeDouble(FPRInfo::fpRegT0, temporaryAddress(m_tempStackTop++)); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| return UNUSED; |
| } |
| |
| int buildUnaryI32(int, WASMOpExpressionI32 op) |
| { |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT0); |
| switch (op) { |
| case WASMOpExpressionI32::Negate: |
| neg32(GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::BitNot: |
| xor32(TrustedImm32(-1), GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::CountLeadingZeros: |
| countLeadingZeros32(GPRInfo::regT0, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::LogicalNot: { |
| // FIXME: Don't use branches. |
| Jump zero = branchTest32(Zero, GPRInfo::regT0); |
| move(TrustedImm32(0), GPRInfo::regT0); |
| Jump end = jump(); |
| zero.link(this); |
| move(TrustedImm32(1), GPRInfo::regT0); |
| end.link(this); |
| break; |
| } |
| case WASMOpExpressionI32::Abs: { |
| // FIXME: Don't use branches. |
| Jump end = branchTest32(PositiveOrZero, GPRInfo::regT0); |
| neg32(GPRInfo::regT0); |
| end.link(this); |
| break; |
| } |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| store32(GPRInfo::regT0, temporaryAddress(m_tempStackTop - 1)); |
| return UNUSED; |
| } |
| |
| int buildUnaryF32(int, WASMOpExpressionF32 op) |
| { |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT1); |
| switch (op) { |
| case WASMOpExpressionF32::Negate: |
| convertFloatToDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT1); |
| negateDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| convertDoubleToFloat(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Abs: |
| convertFloatToDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT1); |
| absDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| convertDoubleToFloat(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Ceil: |
| callOperation(ceilf, FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Floor: |
| callOperation(floorf, FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Sqrt: |
| convertFloatToDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT1); |
| sqrtDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| convertDoubleToFloat(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| storeDouble(FPRInfo::fpRegT0, temporaryAddress(m_tempStackTop - 1)); |
| return UNUSED; |
| } |
| |
| int buildBinaryI32(int, int, WASMOpExpressionI32 op) |
| { |
| load32(temporaryAddress(m_tempStackTop - 2), GPRInfo::regT0); |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT1); |
| switch (op) { |
| case WASMOpExpressionI32::Add: |
| add32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::Sub: |
| sub32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::Mul: |
| mul32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::SDiv: |
| case WASMOpExpressionI32::UDiv: |
| case WASMOpExpressionI32::SMod: |
| case WASMOpExpressionI32::UMod: { |
| m_divideErrorJumpList.append(branchTest32(Zero, GPRInfo::regT1)); |
| if (op == WASMOpExpressionI32::SDiv || op == WASMOpExpressionI32::SMod) { |
| Jump denominatorNotNeg1 = branch32(NotEqual, GPRInfo::regT1, TrustedImm32(-1)); |
| m_divideErrorJumpList.append(branch32(Equal, GPRInfo::regT0, TrustedImm32(-2147483647-1))); |
| denominatorNotNeg1.link(this); |
| } |
| #if CPU(X86) || CPU(X86_64) |
| ASSERT(GPRInfo::regT0 == X86Registers::eax); |
| move(GPRInfo::regT1, X86Registers::ecx); |
| if (op == WASMOpExpressionI32::SDiv || op == WASMOpExpressionI32::SMod) { |
| m_assembler.cdq(); |
| m_assembler.idivl_r(X86Registers::ecx); |
| } else { |
| ASSERT(op == WASMOpExpressionI32::UDiv || op == WASMOpExpressionI32::UMod); |
| xor32(X86Registers::edx, X86Registers::edx); |
| m_assembler.divl_r(X86Registers::ecx); |
| } |
| if (op == WASMOpExpressionI32::SMod || op == WASMOpExpressionI32::UMod) |
| move(X86Registers::edx, GPRInfo::regT0); |
| #else |
| // FIXME: We should be able to do an inline div on ARMv7 and ARM64. |
| switch (op) { |
| case WASMOpExpressionI32::SDiv: |
| callOperation(operationDiv, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::UDiv: |
| callOperation(operationUnsignedDiv, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::SMod: |
| callOperation(operationMod, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::UMod: |
| callOperation(operationUnsignedMod, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| #endif |
| break; |
| } |
| case WASMOpExpressionI32::BitOr: |
| or32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::BitAnd: |
| and32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::BitXor: |
| xor32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::LeftShift: |
| lshift32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::ArithmeticRightShift: |
| rshift32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| case WASMOpExpressionI32::LogicalRightShift: |
| urshift32(GPRInfo::regT1, GPRInfo::regT0); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| m_tempStackTop--; |
| store32(GPRInfo::regT0, temporaryAddress(m_tempStackTop - 1)); |
| return UNUSED; |
| } |
| |
| int buildBinaryF32(int, int, WASMOpExpressionF32 op) |
| { |
| loadDouble(temporaryAddress(m_tempStackTop - 2), FPRInfo::fpRegT0); |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT1); |
| convertFloatToDouble(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| convertFloatToDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT1); |
| switch (op) { |
| case WASMOpExpressionF32::Add: |
| addDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Sub: |
| subDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Mul: |
| mulDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| case WASMOpExpressionF32::Div: |
| divDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT0); |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| convertDoubleToFloat(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| m_tempStackTop--; |
| storeDouble(FPRInfo::fpRegT0, temporaryAddress(m_tempStackTop - 1)); |
| return UNUSED; |
| } |
| |
| int buildRelationalI32(int, int, WASMOpExpressionI32 op) |
| { |
| load32(temporaryAddress(m_tempStackTop - 2), GPRInfo::regT0); |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT1); |
| RelationalCondition condition; |
| switch (op) { |
| case WASMOpExpressionI32::EqualI32: |
| condition = Equal; |
| break; |
| case WASMOpExpressionI32::NotEqualI32: |
| condition = NotEqual; |
| break; |
| case WASMOpExpressionI32::SLessThanI32: |
| condition = LessThan; |
| break; |
| case WASMOpExpressionI32::ULessThanI32: |
| condition = Below; |
| break; |
| case WASMOpExpressionI32::SLessThanOrEqualI32: |
| condition = LessThanOrEqual; |
| break; |
| case WASMOpExpressionI32::ULessThanOrEqualI32: |
| condition = BelowOrEqual; |
| break; |
| case WASMOpExpressionI32::SGreaterThanI32: |
| condition = GreaterThan; |
| break; |
| case WASMOpExpressionI32::UGreaterThanI32: |
| condition = Above; |
| break; |
| case WASMOpExpressionI32::SGreaterThanOrEqualI32: |
| condition = GreaterThanOrEqual; |
| break; |
| case WASMOpExpressionI32::UGreaterThanOrEqualI32: |
| condition = AboveOrEqual; |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| compare32(condition, GPRInfo::regT0, GPRInfo::regT1, GPRInfo::regT0); |
| m_tempStackTop--; |
| store32(GPRInfo::regT0, temporaryAddress(m_tempStackTop - 1)); |
| return UNUSED; |
| } |
| |
| int buildRelationalF32(int, int, WASMOpExpressionI32 op) |
| { |
| loadDouble(temporaryAddress(m_tempStackTop - 2), FPRInfo::fpRegT0); |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT1); |
| convertFloatToDouble(FPRInfo::fpRegT0, FPRInfo::fpRegT0); |
| convertFloatToDouble(FPRInfo::fpRegT1, FPRInfo::fpRegT1); |
| DoubleCondition condition; |
| switch (op) { |
| case WASMOpExpressionI32::EqualF32: |
| condition = DoubleEqual; |
| break; |
| case WASMOpExpressionI32::NotEqualF32: |
| condition = DoubleNotEqual; |
| break; |
| case WASMOpExpressionI32::LessThanF32: |
| condition = DoubleLessThan; |
| break; |
| case WASMOpExpressionI32::LessThanOrEqualF32: |
| condition = DoubleLessThanOrEqual; |
| break; |
| case WASMOpExpressionI32::GreaterThanF32: |
| condition = DoubleGreaterThan; |
| break; |
| case WASMOpExpressionI32::GreaterThanOrEqualF32: |
| condition = DoubleGreaterThanOrEqual; |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| m_tempStackTop--; |
| Jump trueCase = branchDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT1); |
| store32(TrustedImm32(0), temporaryAddress(m_tempStackTop - 1)); |
| Jump end = jump(); |
| trueCase.link(this); |
| store32(TrustedImm32(1), temporaryAddress(m_tempStackTop - 1)); |
| end.link(this); |
| return UNUSED; |
| } |
| |
| int buildRelationalF64(int, int, WASMOpExpressionI32 op) |
| { |
| loadDouble(temporaryAddress(m_tempStackTop - 2), FPRInfo::fpRegT0); |
| loadDouble(temporaryAddress(m_tempStackTop - 1), FPRInfo::fpRegT1); |
| DoubleCondition condition; |
| switch (op) { |
| case WASMOpExpressionI32::EqualF64: |
| condition = DoubleEqual; |
| break; |
| case WASMOpExpressionI32::NotEqualF64: |
| condition = DoubleNotEqual; |
| break; |
| case WASMOpExpressionI32::LessThanF64: |
| condition = DoubleLessThan; |
| break; |
| case WASMOpExpressionI32::LessThanOrEqualF64: |
| condition = DoubleLessThanOrEqual; |
| break; |
| case WASMOpExpressionI32::GreaterThanF64: |
| condition = DoubleGreaterThan; |
| break; |
| case WASMOpExpressionI32::GreaterThanOrEqualF64: |
| condition = DoubleGreaterThanOrEqual; |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| m_tempStackTop--; |
| Jump trueCase = branchDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT1); |
| store32(TrustedImm32(0), temporaryAddress(m_tempStackTop - 1)); |
| Jump end = jump(); |
| trueCase.link(this); |
| store32(TrustedImm32(1), temporaryAddress(m_tempStackTop - 1)); |
| end.link(this); |
| return UNUSED; |
| } |
| |
| int buildCallInternal(uint32_t functionIndex, int, const WASMSignature& signature, WASMExpressionType returnType) |
| { |
| boxArgumentsAndAdjustStackPointer(signature.arguments); |
| |
| JSFunction* function = m_module->functions()[functionIndex].get(); |
| move(TrustedImmPtr(function), GPRInfo::regT0); |
| |
| callAndUnboxResult(returnType); |
| return UNUSED; |
| } |
| |
| void appendExpressionList(int&, int) { } |
| |
| void linkTarget(JumpTarget& target) |
| { |
| target.label = label(); |
| target.jumpList.link(this); |
| } |
| |
| void jumpToTarget(JumpTarget& target) |
| { |
| if (target.label.isSet()) |
| jump(target.label); |
| else |
| target.jumpList.append(jump()); |
| } |
| |
| void jumpToTargetIf(JumpCondition condition, int, JumpTarget& target) |
| { |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT0); |
| m_tempStackTop--; |
| Jump taken = branchTest32((condition == JumpCondition::Zero) ? Zero : NonZero, GPRInfo::regT0); |
| if (target.label.isSet()) |
| taken.linkTo(target.label, this); |
| else |
| target.jumpList.append(taken); |
| } |
| |
| void startLoop() |
| { |
| m_breakTargets.append(JumpTarget()); |
| m_continueTargets.append(JumpTarget()); |
| } |
| |
| void endLoop() |
| { |
| m_breakTargets.removeLast(); |
| m_continueTargets.removeLast(); |
| } |
| |
| void startSwitch() |
| { |
| m_breakTargets.append(JumpTarget()); |
| } |
| |
| void endSwitch() |
| { |
| m_breakTargets.removeLast(); |
| } |
| |
| void startLabel() |
| { |
| m_breakLabelTargets.append(JumpTarget()); |
| m_continueLabelTargets.append(JumpTarget()); |
| |
| linkTarget(m_continueLabelTargets.last()); |
| } |
| |
| void endLabel() |
| { |
| linkTarget(m_breakLabelTargets.last()); |
| |
| m_breakLabelTargets.removeLast(); |
| m_continueLabelTargets.removeLast(); |
| } |
| |
| JumpTarget& breakTarget() |
| { |
| return m_breakTargets.last(); |
| } |
| |
| JumpTarget& continueTarget() |
| { |
| return m_continueTargets.last(); |
| } |
| |
| JumpTarget& breakLabelTarget(uint32_t labelIndex) |
| { |
| return m_breakLabelTargets[labelIndex]; |
| } |
| |
| JumpTarget& continueLabelTarget(uint32_t labelIndex) |
| { |
| return m_continueLabelTargets[labelIndex]; |
| } |
| |
| void buildSwitch(int, const Vector<int64_t>& cases, Vector<JumpTarget>& targets, JumpTarget defaultTarget) |
| { |
| load32(temporaryAddress(m_tempStackTop - 1), GPRInfo::regT0); |
| m_tempStackTop--; |
| BinarySwitch binarySwitch(GPRInfo::regT0, cases, BinarySwitch::Int32); |
| while (binarySwitch.advance(*this)) { |
| unsigned index = binarySwitch.caseIndex(); |
| jump(targets[index].label); |
| } |
| binarySwitch.fallThrough().linkTo(defaultTarget.label, this); |
| } |
| |
| private: |
| union StackSlot { |
| int32_t intValue; |
| float floatValue; |
| double doubleValue; |
| }; |
| |
| Address localAddress(unsigned localIndex) const |
| { |
| ASSERT(localIndex < m_numberOfLocals); |
| return Address(GPRInfo::callFrameRegister, -(localIndex + 1) * sizeof(StackSlot)); |
| } |
| |
| Address temporaryAddress(unsigned temporaryIndex) const |
| { |
| ASSERT(m_numberOfLocals + temporaryIndex < m_stackHeight); |
| return Address(GPRInfo::callFrameRegister, -(m_numberOfLocals + temporaryIndex + 1) * sizeof(StackSlot)); |
| } |
| |
| void appendCall(const FunctionPtr& function) |
| { |
| m_calls.append(std::make_pair(call(), function.value())); |
| } |
| |
| void appendCallWithExceptionCheck(const FunctionPtr& function) |
| { |
| appendCall(function); |
| m_exceptionChecks.append(emitExceptionCheck()); |
| } |
| |
| Call emitNakedCall(CodePtr function) |
| { |
| Call nakedCall = nearCall(); |
| m_calls.append(std::make_pair(nakedCall, function.executableAddress())); |
| return nakedCall; |
| } |
| |
| void appendCallSetResult(const FunctionPtr& function, GPRReg result) |
| { |
| appendCall(function); |
| move(GPRInfo::returnValueGPR, result); |
| } |
| |
| #if CPU(X86) |
| void appendCallSetResult(const FunctionPtr& function, FPRReg result) |
| { |
| appendCall(function); |
| m_assembler.fstpl(0, stackPointerRegister); |
| loadDouble(stackPointerRegister, result); |
| } |
| #elif CPU(ARM) && !CPU(ARM_HARDFP) |
| void appendCallSetResult(const FunctionPtr& function, FPRReg result) |
| { |
| appendCall(function); |
| m_assembler.vmov(result, GPRInfo::returnValueGPR, GPRInfo::returnValueGPR2); |
| } |
| #else // CPU(X86_64) || (CPU(ARM) && CPU(ARM_HARDFP)) || CPU(ARM64) || CPU(MIPS) || CPU(SH4) |
| void appendCallSetResult(const FunctionPtr& function, FPRReg result) |
| { |
| appendCall(function); |
| moveDouble(FPRInfo::returnValueFPR, result); |
| } |
| #endif |
| |
| #if USE(JSVALUE64) |
| void callOperation(Z_JITOperation_EJ operation, GPRReg src, GPRReg dst) |
| { |
| setupArgumentsWithExecState(src); |
| appendCallSetResult(operation, dst); |
| } |
| |
| void callOperation(D_JITOperation_EJ operation, GPRReg src, FPRReg dst) |
| { |
| setupArgumentsWithExecState(src); |
| appendCallSetResult(operation, dst); |
| } |
| #else |
| void callOperation(Z_JITOperation_EJ operation, GPRReg srcTag, GPRReg srcPayload, GPRReg dst) |
| { |
| setupArgumentsWithExecState(EABI_32BIT_DUMMY_ARG srcPayload, srcTag); |
| appendCallSetResult(operation, dst); |
| } |
| |
| void callOperation(D_JITOperation_EJ operation, GPRReg srcTag, GPRReg srcPayload, FPRReg dst) |
| { |
| setupArgumentsWithExecState(EABI_32BIT_DUMMY_ARG srcPayload, srcTag); |
| appendCallSetResult(operation, dst); |
| } |
| #endif |
| |
| void callOperation(float JIT_OPERATION (*operation)(float), FPRegisterID src, FPRegisterID dst) |
| { |
| setupArguments(src); |
| appendCallSetResult(operation, dst); |
| } |
| |
| void callOperation(int32_t JIT_OPERATION (*operation)(int32_t, int32_t), GPRReg src1, GPRReg src2, GPRReg dst) |
| { |
| setupArguments(src1, src2); |
| appendCallSetResult(operation, dst); |
| } |
| |
| void callOperation(uint32_t JIT_OPERATION (*operation)(uint32_t, uint32_t), GPRReg src1, GPRReg src2, GPRReg dst) |
| { |
| setupArguments(src1, src2); |
| appendCallSetResult(operation, dst); |
| } |
| |
| void boxArgumentsAndAdjustStackPointer(const Vector<WASMType>& arguments) |
| { |
| size_t argumentCount = arguments.size(); |
| int stackOffset = -WTF::roundUpToMultipleOf(stackAlignmentRegisters(), m_numberOfLocals + m_tempStackTop + argumentCount + 1 + JSStack::CallFrameHeaderSize); |
| |
| storeTrustedValue(jsUndefined(), Address(GPRInfo::callFrameRegister, (stackOffset + CallFrame::thisArgumentOffset()) * sizeof(Register))); |
| |
| for (size_t i = 0; i < argumentCount; ++i) { |
| Address address(GPRInfo::callFrameRegister, (stackOffset + CallFrame::argumentOffset(i)) * sizeof(Register)); |
| switch (arguments[i]) { |
| case WASMType::I32: |
| load32(temporaryAddress(m_tempStackTop - argumentCount + i), GPRInfo::regT0); |
| #if USE(JSVALUE64) |
| or64(GPRInfo::tagTypeNumberRegister, GPRInfo::regT0); |
| store64(GPRInfo::regT0, address); |
| #else |
| store32(GPRInfo::regT0, address.withOffset(PayloadOffset)); |
| store32(TrustedImm32(JSValue::Int32Tag), address.withOffset(TagOffset)); |
| #endif |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| m_tempStackTop -= argumentCount; |
| |
| addPtr(TrustedImm32(stackOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), GPRInfo::callFrameRegister, stackPointerRegister); |
| store32(TrustedImm32(argumentCount + 1), Address(stackPointerRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC))); |
| } |
| |
| void callAndUnboxResult(WASMExpressionType returnType) |
| { |
| // regT0 holds callee. |
| #if USE(JSVALUE64) |
| store64(GPRInfo::regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) - sizeof(CallerFrameAndPC))); |
| #else |
| store32(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC))); |
| store32(TrustedImm32(CellTag), Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC))); |
| #endif |
| |
| DataLabelPtr addressOfLinkedFunctionCheck; |
| Jump slowCase = branchPtrWithPatch(NotEqual, GPRInfo::regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0)); |
| |
| CallLinkInfo* info = m_codeBlock->addCallLinkInfo(); |
| info->setUpCall(CallLinkInfo::Call, CodeOrigin(), GPRInfo::regT0); |
| m_callCompilationInfo.append(CallCompilationInfo()); |
| m_callCompilationInfo.last().hotPathBegin = addressOfLinkedFunctionCheck; |
| m_callCompilationInfo.last().callLinkInfo = info; |
| m_callCompilationInfo.last().hotPathOther = nearCall(); |
| Jump end = jump(); |
| |
| slowCase.link(this); |
| move(TrustedImmPtr(info), GPRInfo::regT2); |
| m_callCompilationInfo.last().callReturnLocation = emitNakedCall(m_vm->getCTIStub(linkCallThunkGenerator).code()); |
| |
| end.link(this); |
| addPtr(TrustedImm32(-WTF::roundUpToMultipleOf(stackAlignmentRegisters(), m_stackHeight) * sizeof(StackSlot) - maxFrameExtentForSlowPathCall), GPRInfo::callFrameRegister, stackPointerRegister); |
| checkStackPointerAlignment(); |
| |
| switch (returnType) { |
| case WASMExpressionType::I32: |
| store32(GPRInfo::returnValueGPR, temporaryAddress(m_tempStackTop++)); |
| break; |
| case WASMExpressionType::Void: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| #if USE(JSVALUE64) |
| void loadValueAndConvertToInt32(Address address, GPRReg dst) |
| { |
| JSValueRegs tempRegs(dst); |
| loadValue(address, tempRegs); |
| Jump checkJSInt32 = branchIfInt32(tempRegs); |
| |
| callOperation(operationConvertJSValueToInt32, dst, dst); |
| |
| checkJSInt32.link(this); |
| } |
| |
| void loadValueAndConvertToDouble(Address address, FPRReg dst, GPRReg scratch1, GPRReg scratch2) |
| { |
| JSValueRegs tempRegs(scratch1); |
| loadValue(address, tempRegs); |
| Jump checkJSInt32 = branchIfInt32(tempRegs); |
| Jump checkJSNumber = branchIfNumber(tempRegs, scratch2); |
| JumpList end; |
| |
| callOperation(operationConvertJSValueToDouble, tempRegs.gpr(), dst); |
| end.append(jump()); |
| |
| checkJSInt32.link(this); |
| convertInt32ToDouble(tempRegs.gpr(), dst); |
| end.append(jump()); |
| |
| checkJSNumber.link(this); |
| unboxDoubleWithoutAssertions(tempRegs.gpr(), dst); |
| end.link(this); |
| } |
| #else |
| void loadValueAndConvertToInt32(Address address, GPRReg dst, GPRReg scratch) |
| { |
| JSValueRegs tempRegs(scratch, dst); |
| loadValue(address, tempRegs); |
| Jump checkJSInt32 = branchIfInt32(tempRegs); |
| |
| callOperation(operationConvertJSValueToInt32, tempRegs.tagGPR(), tempRegs.payloadGPR(), dst); |
| |
| checkJSInt32.link(this); |
| } |
| |
| void loadValueAndConvertToDouble(Address address, FPRReg dst, GPRReg scratch1, GPRReg scratch2, GPRReg scratch3, FPRReg fpScratch) |
| { |
| JSValueRegs tempRegs(scratch2, scratch1); |
| loadValue(address, tempRegs); |
| Jump checkJSInt32 = branchIfInt32(tempRegs); |
| Jump checkJSNumber = branchIfNumber(tempRegs, scratch3); |
| JumpList end; |
| |
| callOperation(operationConvertJSValueToDouble, tempRegs.tagGPR(), tempRegs.payloadGPR(), dst); |
| end.append(jump()); |
| |
| checkJSInt32.link(this); |
| convertInt32ToDouble(tempRegs.payloadGPR(), dst); |
| end.append(jump()); |
| |
| checkJSNumber.link(this); |
| unboxDouble(tempRegs.tagGPR(), tempRegs.payloadGPR(), dst, fpScratch) |
| end.link(this); |
| } |
| #endif |
| |
| JSWASMModule* m_module; |
| unsigned m_stackHeight; |
| unsigned m_numberOfLocals; |
| unsigned m_tempStackTop { 0 }; |
| |
| Vector<JumpTarget> m_breakTargets; |
| Vector<JumpTarget> m_continueTargets; |
| Vector<JumpTarget> m_breakLabelTargets; |
| Vector<JumpTarget> m_continueLabelTargets; |
| |
| Label m_beginLabel; |
| Jump m_stackOverflow; |
| JumpList m_divideErrorJumpList; |
| JumpList m_exceptionChecks; |
| |
| Vector<std::pair<Call, void*>> m_calls; |
| Vector<CallCompilationInfo> m_callCompilationInfo; |
| }; |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(WEBASSEMBLY) |
| |
| #endif // WASMFunctionCompiler_h |
