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[UCRT:VCRUNTIME] Implement __isa_available_init()

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This commit is contained in:
Timo Kreuzer 2024-12-02 13:56:48 +02:00
parent 9c887efa0e
commit 8aab548ecd
2 changed files with 66 additions and 0 deletions
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65
sdk/lib/ucrt/vcruntime/isa_available.cpp Normal file
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@ -0,0 +1,65 @@
//
// isa_available.c
//
// Copyright (c) 2024 Timo Kreuzer
//
// Implementation of __isa_available_init.
//
// SPDX-License-Identifier: MIT
//
#include <isa_availability.h>
#include <intrin.h>
#include <windef.h>
#include <winbase.h>
extern "C" { int __isa_available = 0; }
extern "C"
int
__cdecl
__isa_available_init(void)
{
#if defined(_M_IX86) || defined(_M_X64)
if (IsProcessorFeaturePresent(PF_AVX512F_INSTRUCTIONS_AVAILABLE))
{
__isa_available = __ISA_AVAILABLE_AVX512;
}
else if (IsProcessorFeaturePresent(PF_AVX2_INSTRUCTIONS_AVAILABLE))
{
__isa_available = __ISA_AVAILABLE_AVX2;
}
else if (IsProcessorFeaturePresent(PF_AVX_INSTRUCTIONS_AVAILABLE))
{
__isa_available = __ISA_AVAILABLE_AVX;
}
else if (IsProcessorFeaturePresent(PF_SSE4_2_INSTRUCTIONS_AVAILABLE))
{
__isa_available = __ISA_AVAILABLE_SSE42;
}
else if (IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE))
{
__isa_available = __ISA_AVAILABLE_SSE2;
}
else
{
__isa_available = __ISA_AVAILABLE_X86;
}
#elif defined(_M_ARM) || defined(_M_ARM64)
// CHECKME: Is this correct?
if (IsProcessorFeaturePresent(PF_ARM_V8_INSTRUCTIONS_AVAILABLE))
{
#ifdef _M_ARM64
__isa_available = __ISA_AVAILABLE_NEON_ARM64;
#else
__isa_available = __ISA_AVAILABLE_NEON;
#endif
}
else
{
__isa_available = __ISA_AVAILABLE_ARMNT;
}
#endif
return 0;
}

1
sdk/lib/ucrt/vcruntime/vcruntime.cmake
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@ -5,6 +5,7 @@ list(APPEND UCRT_VCRUNTIME_SOURCES
vcruntime/__security_init_cookie.c vcruntime/__security_init_cookie.c
vcruntime/__vcrt_init.c vcruntime/__vcrt_init.c
vcruntime/initializers.cpp vcruntime/initializers.cpp
vcruntime/isa_available.cpp
) )
if(${ARCH} STREQUAL "i386") if(${ARCH} STREQUAL "i386")