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/*
* Copyright (C) 2008-2023 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
#include "JSExportMacros.h"
#include <wtf/NumberOfCores.h>
#include <wtf/StdIntExtras.h>
namespace JSC {
using UCPUStrictInt32 = UCPURegister;
constexpr bool isARMv7IDIVSupported()
{
#if HAVE(ARM_IDIV_INSTRUCTIONS)
return true;
#else
return false;
#endif
}
constexpr bool isARM_THUMB2()
{
#if CPU(ARM_THUMB2)
return true;
#else
return false;
#endif
}
constexpr bool hasUnalignedFPMemoryAccess()
{
return !isARM_THUMB2();
}
constexpr bool isARM64()
{
#if CPU(ARM64)
return true;
#else
return false;
#endif
}
constexpr bool isARM64E()
{
#if CPU(ARM64E)
return true;
#else
return false;
#endif
}
#if CPU(ARM64)
#if CPU(ARM64E)
JS_EXPORT_PRIVATE bool isARM64E_FPAC();
#else
constexpr bool isARM64E_FPAC() { return false; }
#endif
#if CPU(ARM64E) || OS(MAC_OS_X)
// ARM64E or all macOS ARM64 CPUs have LSE.
constexpr bool isARM64_LSE() { return true; }
#else
JS_EXPORT_PRIVATE bool isARM64_LSE();
#endif
#else // not CPU(ARM64)
constexpr bool isARM64_LSE() { return false; }
constexpr bool isARM64E_FPAC() { return false; }
#endif
constexpr bool isX86()
{
#if CPU(X86_64) || CPU(X86)
return true;
#else
return false;
#endif
}
constexpr bool isX86_64()
{
#if CPU(X86_64)
return true;
#else
return false;
#endif
}
#if CPU(X86_64)
JS_EXPORT_PRIVATE bool isX86_64_AVX();
#else
constexpr bool isX86_64_AVX()
{
return false;
}
#endif
constexpr bool isRISCV64()
{
#if CPU(RISCV64)
return true;
#else
return false;
#endif
}
constexpr bool is64Bit()
{
#if USE(JSVALUE64)
return true;
#else
return false;
#endif
}
constexpr bool is32Bit()
{
return !is64Bit();
}
constexpr bool isAddress64Bit()
{
return sizeof(void*) == 8;
}
constexpr bool isAddress32Bit()
{
return !isAddress64Bit();
}
constexpr size_t registerSize()
{
#if CPU(REGISTER64)
return 8;
#elif CPU(REGISTER32)
return 4;
#else
# error "Unknown register size"
#endif
}
constexpr bool isRegister64Bit()
{
return registerSize() == 8;
}
constexpr bool isRegister32Bit()
{
return registerSize() == 4;
}
inline bool optimizeForARMv7IDIVSupported();
inline bool optimizeForARM64();
inline bool optimizeForX86();
inline bool optimizeForX86_64();
inline bool hasSensibleDoubleToInt();
#if PLATFORM(MAC) || PLATFORM(MACCATALYST)
bool isKernOpenSource();
#endif
#if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
bool isKernTCSMAvailable();
bool enableKernTCSM();
int kernTCSMAwareNumberOfProcessorCores();
int64_t hwL3CacheSize();
int32_t hwPhysicalCPUMax();
#else
ALWAYS_INLINE bool isKernTCSMAvailable() { return false; }
ALWAYS_INLINE bool enableKernTCSM() { return false; }
ALWAYS_INLINE int kernTCSMAwareNumberOfProcessorCores() { return WTF::numberOfProcessorCores(); }
ALWAYS_INLINE int64_t hwL3CacheSize() { return 0; }
ALWAYS_INLINE int32_t hwPhysicalCPUMax() { return kernTCSMAwareNumberOfProcessorCores(); }
#endif
constexpr size_t prologueStackPointerDelta()
{
#if ENABLE(C_LOOP)
// Prologue saves the framePointerRegister and linkRegister
return 2 * sizeof(CPURegister);
#elif CPU(X86_64)
// Prologue only saves the framePointerRegister
return sizeof(CPURegister);
#elif CPU(ARM_THUMB2) || CPU(ARM64) || CPU(RISCV64)
// Prologue saves the framePointerRegister and linkRegister
return 2 * sizeof(CPURegister);
#else
#error unsupported architectures
#endif
}
} // namespace JSC
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