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[VCRUNTIME][VCSTARTUP] Add separate vcruntime and vcstartup lib

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vcruntime contains the code that is linked into ucrtbase (in VS it is also provided as vcruntime140.dll)
vcstartup contains the code that is statically linked into executables that link to ucrtbase.dll. In Visual Studio this is part of msvcrt.lib (the import library for msvcrt), similar to our current msvcrtex, and it gets linked when you link to ucrtbase as well. The name is based on the folder name in the library.
Both libraries share some code, but each file is only compiled once.
This commit is contained in:
Timo Kreuzer 2025-01-17 11:45:05 +02:00
parent 2b2bdabe72
commit 9186b861a6
21 changed files with 79 additions and 26 deletions
sdk/lib/vcruntime
isa_available.cpp

65
sdk/lib/vcruntime/isa_available.cpp Normal file
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//
// 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;
}