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CMake: Add ALLOW_CLMUL_CRC option to enable/disable CLMUL.

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The option is enabled by default, but will only be visible to a user
listing cache variables or using a CMake GUI application if the
immintrin.h header file is found.

This mirrors our Autotools build --disable-clmul-crc functionality.
This commit is contained in:
Jia Tan 2023-10-19 16:09:01 +08:00
parent 5056bc5107
commit 1695021e4a
1 changed files with 23 additions and 17 deletions
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40
CMakeLists.txt
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@ -802,23 +802,29 @@ if(HAVE_IMMINTRIN_H)
tuklib_add_definition_if(liblzma HAVE__MM_MOVEMASK_EPI8) tuklib_add_definition_if(liblzma HAVE__MM_MOVEMASK_EPI8)
# CLMUL intrinsic: # CLMUL intrinsic:
check_c_source_compiles(" option(ALLOW_CLMUL_CRC "Allow carryless multiplication for CRC \
#include <immintrin.h> calculation if supported by the system" ON)
#if defined(__e2k__) && __iset__ < 6
# error if(ALLOW_CLMUL_CRC)
#endif check_c_source_compiles("
#if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__) #include <immintrin.h>
__attribute__((__target__(\"ssse3,sse4.1,pclmul\"))) #if defined(__e2k__) && __iset__ < 6
#endif # error
__m128i my_clmul(__m128i a) #endif
{ #if (defined(__GNUC__) || defined(__clang__)) \
const __m128i b = _mm_set_epi64x(1, 2); && !defined(__EDG__)
return _mm_clmulepi64_si128(a, b, 0); __attribute__((__target__(\"ssse3,sse4.1,pclmul\")))
} #endif
int main(void) { return 0; } __m128i my_clmul(__m128i a)
" {
HAVE_USABLE_CLMUL) const __m128i b = _mm_set_epi64x(1, 2);
tuklib_add_definition_if(liblzma HAVE_USABLE_CLMUL) return _mm_clmulepi64_si128(a, b, 0);
}
int main(void) { return 0; }
"
HAVE_USABLE_CLMUL)
tuklib_add_definition_if(liblzma HAVE_USABLE_CLMUL)
endif()
endif() endif()
# Support -fvisiblity=hidden when building shared liblzma. # Support -fvisiblity=hidden when building shared liblzma.