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/*
* 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 {
class Procedure;
extern const char* const tierName;
enum B3CompilationMode {
B3Mode,
AirMode
};
JS_EXPORT_PRIVATE bool shouldDumpIR(Procedure&, B3CompilationMode);
bool shouldDumpIRAtEachPhase(B3CompilationMode);
bool shouldValidateIR();
bool shouldValidateIRAtEachPhase();
bool shouldSaveIRBeforePhase();
template<typename BitsType, typename InputType>
inline bool isIdentical(InputType left, InputType right)
{
BitsType leftBits = bitwise_cast<BitsType>(left);
BitsType rightBits = bitwise_cast<BitsType>(right);
return leftBits == rightBits;
}
inline bool isIdentical(int32_t left, int32_t right)
{
return isIdentical<int32_t>(left, right);
}
inline bool isIdentical(int64_t left, int64_t right)
{
return isIdentical<int64_t>(left, right);
}
inline bool isIdentical(double left, double right)
{
return isIdentical<int64_t>(left, right);
}
inline bool isIdentical(float left, float right)
{
return isIdentical<int32_t>(left, right);
}
template<typename ResultType, typename InputType, typename BitsType>
inline bool isRepresentableAsImpl(InputType originalValue)
{
// Convert the original value to the desired result type.
ResultType result = static_cast<ResultType>(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<InputType>(result);
return isIdentical<BitsType>(originalValue, newValue);
}
template<typename ResultType>
inline bool isRepresentableAs(int32_t value)
{
return isRepresentableAsImpl<ResultType, int32_t, int32_t>(value);
}
template<typename ResultType>
inline bool isRepresentableAs(int64_t value)
{
return isRepresentableAsImpl<ResultType, int64_t, int64_t>(value);
}
template<typename ResultType>
inline bool isRepresentableAs(size_t value)
{
return isRepresentableAsImpl<ResultType, size_t, size_t>(value);
}
template<typename ResultType>
inline bool isRepresentableAs(double value)
{
return isRepresentableAsImpl<ResultType, double, int64_t>(value);
}
template<typename IntType>
static IntType chillDiv(IntType numerator, IntType denominator)
{
if (!denominator)
return 0;
if (denominator == -1 && numerator == std::numeric_limits<IntType>::min())
return std::numeric_limits<IntType>::min();
return numerator / denominator;
}
template<typename IntType>
static IntType chillMod(IntType numerator, IntType denominator)
{
if (!denominator)
return 0;
if (denominator == -1 && numerator == std::numeric_limits<IntType>::min())
return 0;
return numerator % denominator;
}
template<typename IntType>
static IntType chillUDiv(IntType numerator, IntType denominator)
{
typedef typename std::make_unsigned<IntType>::type UnsignedIntType;
UnsignedIntType unsignedNumerator = static_cast<UnsignedIntType>(numerator);
UnsignedIntType unsignedDenominator = static_cast<UnsignedIntType>(denominator);
if (!unsignedDenominator)
return 0;
return unsignedNumerator / unsignedDenominator;
}
template<typename IntType>
static IntType chillUMod(IntType numerator, IntType denominator)
{
typedef typename std::make_unsigned<IntType>::type UnsignedIntType;
UnsignedIntType unsignedNumerator = static_cast<UnsignedIntType>(numerator);
UnsignedIntType unsignedDenominator = static_cast<UnsignedIntType>(denominator);
if (!unsignedDenominator)
return 0;
return unsignedNumerator % unsignedDenominator;
}
template<typename FloatType>
static FloatType fMax(FloatType a, FloatType b)
{
if (std::isnan(a) || std::isnan(b))
return a + b;
if (a == static_cast<FloatType>(0.0) && b == static_cast<FloatType>(0.0) && std::signbit(a) != std::signbit(b))
return static_cast<FloatType>(0.0);
return std::max(a, b);
}
template<typename FloatType>
static FloatType fMin(FloatType a, FloatType b)
{
if (std::isnan(a) || std::isnan(b))
return a + b;
if (a == static_cast<FloatType>(0.0) && b == static_cast<FloatType>(0.0) && std::signbit(a) != std::signbit(b))
return static_cast<FloatType>(-0.0);
return std::min(a, b);
}
template<typename IntType>
static IntType rotateRight(IntType value, int32_t shift)
{
typedef typename std::make_unsigned<IntType>::type UnsignedIntType;
UnsignedIntType uValue = static_cast<UnsignedIntType>(value);
int32_t bits = sizeof(IntType) * 8;
int32_t mask = bits - 1;
shift &= mask;
return (uValue >> shift) | (uValue << ((bits - shift) & mask));
}
template<typename IntType>
static IntType rotateLeft(IntType value, int32_t shift)
{
typedef typename std::make_unsigned<IntType>::type UnsignedIntType;
UnsignedIntType uValue = static_cast<UnsignedIntType>(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();
}
GPRReg extendedOffsetAddrRegister();
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
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