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d0b292cda6
Previously this was mixed with vcruntime, with some objects being shared. But this is messy. Instead use a separate library and link ucrtbase to this as well. This also matches more closely how native libraries are organized, where vcstartup is merged into the CRT import libraries, while vcruntime is merged into the static CRT libraries.
66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
//
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// isa_available.c
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//
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// Copyright (c) 2024 Timo Kreuzer
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//
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// Implementation of __isa_available_init.
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//
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// SPDX-License-Identifier: MIT
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//
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#include <isa_availability.h>
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#include <intrin.h>
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#include <windef.h>
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#include <winbase.h>
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extern "C" { int __isa_available = 0; }
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extern "C"
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int
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__cdecl
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__isa_available_init(void)
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{
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#if defined(_M_IX86) || defined(_M_X64)
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if (IsProcessorFeaturePresent(PF_AVX512F_INSTRUCTIONS_AVAILABLE))
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{
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__isa_available = __ISA_AVAILABLE_AVX512;
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}
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else if (IsProcessorFeaturePresent(PF_AVX2_INSTRUCTIONS_AVAILABLE))
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{
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__isa_available = __ISA_AVAILABLE_AVX2;
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}
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else if (IsProcessorFeaturePresent(PF_AVX_INSTRUCTIONS_AVAILABLE))
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{
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__isa_available = __ISA_AVAILABLE_AVX;
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}
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else if (IsProcessorFeaturePresent(PF_SSE4_2_INSTRUCTIONS_AVAILABLE))
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{
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__isa_available = __ISA_AVAILABLE_SSE42;
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}
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else if (IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE))
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{
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__isa_available = __ISA_AVAILABLE_SSE2;
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}
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else
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{
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__isa_available = __ISA_AVAILABLE_X86;
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}
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#elif defined(_M_ARM) || defined(_M_ARM64)
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// CHECKME: Is this correct?
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if (IsProcessorFeaturePresent(PF_ARM_V8_INSTRUCTIONS_AVAILABLE))
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{
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#ifdef _M_ARM64
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__isa_available = __ISA_AVAILABLE_NEON_ARM64;
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#else
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__isa_available = __ISA_AVAILABLE_NEON;
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#endif
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}
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else
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{
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__isa_available = __ISA_AVAILABLE_ARMNT;
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}
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#endif
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return 0;
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}
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