/* * Copyright (C) 2015-2020 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. */ #pragma once #if ENABLE(B3_JIT) #include "CPU.h" #include "GPRInfo.h" #include "JSExportMacros.h" #include "Options.h" namespace JSC { namespace B3 { extern const char* const tierName; enum B3CompilationMode { B3Mode, AirMode }; JS_EXPORT_PRIVATE bool shouldDumpIR(B3CompilationMode); bool shouldDumpIRAtEachPhase(B3CompilationMode); bool shouldValidateIR(); bool shouldValidateIRAtEachPhase(); bool shouldSaveIRBeforePhase(); template inline bool isIdentical(InputType left, InputType right) { BitsType leftBits = bitwise_cast(left); BitsType rightBits = bitwise_cast(right); return leftBits == rightBits; } inline bool isIdentical(int32_t left, int32_t right) { return isIdentical(left, right); } inline bool isIdentical(int64_t left, int64_t right) { return isIdentical(left, right); } inline bool isIdentical(double left, double right) { return isIdentical(left, right); } inline bool isIdentical(float left, float right) { return isIdentical(left, right); } template inline bool isRepresentableAsImpl(InputType originalValue) { // Convert the original value to the desired result type. ResultType result = static_cast(originalValue); // Convert the converted value back to the original type. The original value is representable // using the new type if such round-tripping doesn't lose bits. InputType newValue = static_cast(result); return isIdentical(originalValue, newValue); } template inline bool isRepresentableAs(int32_t value) { return isRepresentableAsImpl(value); } template inline bool isRepresentableAs(int64_t value) { return isRepresentableAsImpl(value); } template inline bool isRepresentableAs(size_t value) { return isRepresentableAsImpl(value); } template inline bool isRepresentableAs(double value) { return isRepresentableAsImpl(value); } template static IntType chillDiv(IntType numerator, IntType denominator) { if (!denominator) return 0; if (denominator == -1 && numerator == std::numeric_limits::min()) return std::numeric_limits::min(); return numerator / denominator; } template static IntType chillMod(IntType numerator, IntType denominator) { if (!denominator) return 0; if (denominator == -1 && numerator == std::numeric_limits::min()) return 0; return numerator % denominator; } template static IntType chillUDiv(IntType numerator, IntType denominator) { typedef typename std::make_unsigned::type UnsignedIntType; UnsignedIntType unsignedNumerator = static_cast(numerator); UnsignedIntType unsignedDenominator = static_cast(denominator); if (!unsignedDenominator) return 0; return unsignedNumerator / unsignedDenominator; } template static IntType chillUMod(IntType numerator, IntType denominator) { typedef typename std::make_unsigned::type UnsignedIntType; UnsignedIntType unsignedNumerator = static_cast(numerator); UnsignedIntType unsignedDenominator = static_cast(denominator); if (!unsignedDenominator) return 0; return unsignedNumerator % unsignedDenominator; } template static IntType rotateRight(IntType value, int32_t shift) { typedef typename std::make_unsigned::type UnsignedIntType; UnsignedIntType uValue = static_cast(value); int32_t bits = sizeof(IntType) * 8; int32_t mask = bits - 1; shift &= mask; return (uValue >> shift) | (uValue << ((bits - shift) & mask)); } template static IntType rotateLeft(IntType value, int32_t shift) { typedef typename std::make_unsigned::type UnsignedIntType; UnsignedIntType uValue = static_cast(value); int32_t bits = sizeof(IntType) * 8; int32_t mask = bits - 1; shift &= mask; return (uValue << shift) | (uValue >> ((bits - shift) & mask)); } inline unsigned defaultOptLevel() { // This should almost always return 2, but we allow this default to be lowered for testing. Some // components will deliberately set the optLevel. return Options::defaultB3OptLevel(); } std::optional pinnedExtendedOffsetAddrRegister(); } } // namespace JSC::B3 #endif // ENABLE(B3_JIT)