diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 93 |
1 files changed, 29 insertions, 64 deletions
diff --git a/configure b/configure index 163ef9a7732..02b2c2e1061 100755 --- a/configure +++ b/configure @@ -17364,87 +17364,47 @@ fi # Check for Intel SSE 4.2 intrinsics to do CRC calculations. # -# First check if the _mm_crc32_u8 and _mm_crc32_u64 intrinsics can be used -# with the default compiler flags. If not, check if adding the -msse4.2 -# flag helps. CFLAGS_CRC is set to -msse4.2 if that's required. -{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for _mm_crc32_u8 and _mm_crc32_u32 with CFLAGS=" >&5 -$as_echo_n "checking for _mm_crc32_u8 and _mm_crc32_u32 with CFLAGS=... " >&6; } -if ${pgac_cv_sse42_crc32_intrinsics_+:} false; then : +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for _mm_crc32_u8 and _mm_crc32_u32" >&5 +$as_echo_n "checking for _mm_crc32_u8 and _mm_crc32_u32... " >&6; } +if ${pgac_cv_sse42_crc32_intrinsics+:} false; then : $as_echo_n "(cached) " >&6 else - pgac_save_CFLAGS=$CFLAGS -CFLAGS="$pgac_save_CFLAGS " -cat confdefs.h - <<_ACEOF >conftest.$ac_ext -/* end confdefs.h. */ -#include <nmmintrin.h> -int -main () -{ -unsigned int crc = 0; - crc = _mm_crc32_u8(crc, 0); - crc = _mm_crc32_u32(crc, 0); - /* return computed value, to prevent the above being optimized away */ - return crc == 0; - ; - return 0; -} -_ACEOF -if ac_fn_c_try_link "$LINENO"; then : - pgac_cv_sse42_crc32_intrinsics_=yes -else - pgac_cv_sse42_crc32_intrinsics_=no -fi -rm -f core conftest.err conftest.$ac_objext \ - conftest$ac_exeext conftest.$ac_ext -CFLAGS="$pgac_save_CFLAGS" -fi -{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_sse42_crc32_intrinsics_" >&5 -$as_echo "$pgac_cv_sse42_crc32_intrinsics_" >&6; } -if test x"$pgac_cv_sse42_crc32_intrinsics_" = x"yes"; then - CFLAGS_CRC="" - pgac_sse42_crc32_intrinsics=yes -fi - -if test x"$pgac_sse42_crc32_intrinsics" != x"yes"; then - { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _mm_crc32_u8 and _mm_crc32_u32 with CFLAGS=-msse4.2" >&5 -$as_echo_n "checking for _mm_crc32_u8 and _mm_crc32_u32 with CFLAGS=-msse4.2... " >&6; } -if ${pgac_cv_sse42_crc32_intrinsics__msse4_2+:} false; then : - $as_echo_n "(cached) " >&6 -else - pgac_save_CFLAGS=$CFLAGS -CFLAGS="$pgac_save_CFLAGS -msse4.2" -cat confdefs.h - <<_ACEOF >conftest.$ac_ext + cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ #include <nmmintrin.h> + #if defined(__has_attribute) && __has_attribute (target) + __attribute__((target("sse4.2"))) + #endif + static int crc32_sse42_test(void) + { + unsigned int crc = 0; + crc = _mm_crc32_u8(crc, 0); + crc = _mm_crc32_u32(crc, 0); + /* return computed value, to prevent the above being optimized away */ + return crc == 0; + } int main () { -unsigned int crc = 0; - crc = _mm_crc32_u8(crc, 0); - crc = _mm_crc32_u32(crc, 0); - /* return computed value, to prevent the above being optimized away */ - return crc == 0; +return crc32_sse42_test(); ; return 0; } _ACEOF if ac_fn_c_try_link "$LINENO"; then : - pgac_cv_sse42_crc32_intrinsics__msse4_2=yes + pgac_cv_sse42_crc32_intrinsics=yes else - pgac_cv_sse42_crc32_intrinsics__msse4_2=no + pgac_cv_sse42_crc32_intrinsics=no fi rm -f core conftest.err conftest.$ac_objext \ conftest$ac_exeext conftest.$ac_ext -CFLAGS="$pgac_save_CFLAGS" fi -{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_sse42_crc32_intrinsics__msse4_2" >&5 -$as_echo "$pgac_cv_sse42_crc32_intrinsics__msse4_2" >&6; } -if test x"$pgac_cv_sse42_crc32_intrinsics__msse4_2" = x"yes"; then - CFLAGS_CRC="-msse4.2" +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_sse42_crc32_intrinsics" >&5 +$as_echo "$pgac_cv_sse42_crc32_intrinsics" >&6; } +if test x"$pgac_cv_sse42_crc32_intrinsics" = x"yes"; then pgac_sse42_crc32_intrinsics=yes fi -fi # Are we targeting a processor that supports SSE 4.2? gcc, clang and icc all # define __SSE4_2__ in that case. @@ -17647,15 +17607,20 @@ fi # If we are targeting a processor that has Intel SSE 4.2 instructions, we can # use the special CRC instructions for calculating CRC-32C. If we're not # targeting such a processor, but we can nevertheless produce code that uses -# the SSE intrinsics, perhaps with some extra CFLAGS, compile both -# implementations and select which one to use at runtime, depending on whether -# SSE 4.2 is supported by the processor we're running on. +# the SSE intrinsics, compile both implementations and select which one to use +# at runtime, depending on whether SSE 4.2 is supported by the processor we're +# running on. # # Similarly, if we are targeting an ARM processor that has the CRC # instructions that are part of the ARMv8 CRC Extension, use them. And if # we're not targeting such a processor, but can nevertheless produce code that # uses the CRC instructions, compile both, and select at runtime. # +# Note that we do not use __attribute__((target("..."))) for the ARM CRC +# instructions because until clang 16, using the ARM intrinsics still requires +# special -march flags. Perhaps we can re-evaluate this decision after some +# time has passed. +# # You can skip the runtime check by setting the appropriate USE_*_CRC32 flag to 1 # in the template or configure command line. # |