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[5.0.x] mpl: Improved check for AVX/AVX512F support #7701

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Merged
hzhou merged 1 commit into from
Jan 9, 2026
+22 −6
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[5.0.x] mpl: Improved check for AVX/AVX512F support #7701

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28 changes: 22 additions & 6 deletions src/mpl/configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -207,12 +207,28 @@ fi

# check if compiler supports avx, avx512f
# also check if the building machine can run them if not force enabled
AC_CACHE_CHECK([whether -mavx2 is supported], pac_cv_found_avx,
[PAC_C_CHECK_COMPILER_OPTION([-mavx2],pac_cv_found_avx=yes,pac_cv_found_avx=no)],
pac_cv_found_avx=no,pac_cv_found_avx=yes)
AC_CACHE_CHECK([whether -mavx512f is supported], pac_cv_found_avx512f,
[PAC_C_CHECK_COMPILER_OPTION([-mavx512f],pac_cv_found_avx512f=yes,pac_cv_found_avx512f=no)],
pac_cv_found_avx512f=no,pac_cv_found_avx512f=yes)
AC_CACHE_CHECK([whether -mavx2 is supported], pac_cv_found_avx, [
PAC_PUSH_FLAG([CFLAGS])
PAC_APPEND_FLAG([-mavx2], [CFLAGS])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]],[[
const void *src;
void *dest;
__m256i ymm = _mm256_loadu_si256(src);
_mm256_stream_si256(dest, ymm);
]])],
pac_cv_found_avx=yes,pac_cv_found_avx=no)
PAC_POP_FLAG([CFLAGS])])
AC_CACHE_CHECK([whether -mavx512f is supported], pac_cv_found_avx512f, [
PAC_PUSH_FLAG([CFLAGS])
PAC_APPEND_FLAG([-mavx512f], [CFLAGS])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]],[[
const void *src;
void *dest;
__m512i zmm = _mm512_loadu_si512(src);
_mm512_stream_si512(dest, zmm);
]])],
pac_cv_found_avx512f=yes,pac_cv_found_avx512f=no)
PAC_POP_FLAG([CFLAGS])])

AM_CONDITIONAL([MPL_BUILD_AVX], [test "x$pac_cv_found_avx" = "xyes"])
if test "x$pac_cv_found_avx" = "xyes"; then
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