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liblzma: Remove MSVC hack from CLMUL CRC

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It's not enough with MSVC 19.29 (VS 2019) even if the hack was also
applied to the CRC32 code. The tests crash when built for 32-bit x86.
This commit is contained in:
Lasse Collin 2025-04-07 22:36:58 +03:00
parent 49ba8c69ea
commit c5fd88dfc3
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1 changed files with 0 additions and 8 deletions
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src/liblzma/check/crc64_fast.c
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@ -146,14 +146,6 @@ crc64_dispatch(const uint8_t *buf, size_t size, uint64_t crc)
extern LZMA_API(uint64_t)
lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc)
{
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__) \
&& defined(_M_IX86) && defined(CRC64_ARCH_OPTIMIZED)
// VS2015-2022 might corrupt the ebx register on 32-bit x86 when
// the CLMUL code is enabled. This hack forces MSVC to store and
// restore ebx. This is only needed here, not in lzma_crc32().
__asm mov ebx, ebx
#endif
#if defined(CRC64_GENERIC) && defined(CRC64_ARCH_OPTIMIZED)
return crc64_func(buf, size, crc);