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| author | Sunil K Pandey <skpgkp2@gmail.com> | 2024-02-13 12:23:14 -0800 |
|---|---|---|
| committer | Sunil K Pandey <skpgkp2@gmail.com> | 2024-02-25 13:20:51 -0800 |
| commit | 9f78a7c1d0963282608da836b840f0d5ae1c478e (patch) | |
| tree | bb6e79f075d7fbc5b2b6e39d4551f8a8b0dda332 /sysdeps/x86/configure.ac | |
| parent | f31d677fd69fb68c8b7a3c4cdaa6e9a1bd46d6a4 (diff) | |
| download | glibc-9f78a7c1d0963282608da836b840f0d5ae1c478e.zip glibc-9f78a7c1d0963282608da836b840f0d5ae1c478e.tar.gz glibc-9f78a7c1d0963282608da836b840f0d5ae1c478e.tar.bz2 | |
x86_64: Exclude SSE, AVX and FMA4 variants in libm multiarch
When glibc is built with ISA level 3 or higher by default, the resulting
glibc binaries won't run on SSE or FMA4 processors. Exclude SSE, AVX and
FMA4 variants in libm multiarch when ISA level 3 or higher is enabled by
default.
When glibc is built with ISA level 2 enabled by default, only keep SSE4.1
variant.
Fixes BZ 31335.
NB: elf/tst-valgrind-smoke test fails with ISA level 4, because valgrind
doesn't support AVX512 instructions:
https://bugs.kde.org/show_bug.cgi?id=383010
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86/configure.ac')
| -rw-r--r-- | sysdeps/x86/configure.ac | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sysdeps/x86/configure.ac b/sysdeps/x86/configure.ac index 437a506..78ff7c8 100644 --- a/sysdeps/x86/configure.ac +++ b/sysdeps/x86/configure.ac @@ -72,6 +72,7 @@ if test $libc_cv_include_x86_isa_level = yes; then fi]) if test $libc_cv_have_x86_lahf_sahf = yes; then AC_DEFINE(HAVE_X86_LAHF_SAHF) + ISAFLAG="-DHAVE_X86_LAHF_SAHF" fi AC_CACHE_CHECK([for MOVBE instruction support], libc_cv_have_x86_movbe, [dnl @@ -81,8 +82,31 @@ if test $libc_cv_include_x86_isa_level = yes; then fi]) if test $libc_cv_have_x86_movbe = yes; then AC_DEFINE(HAVE_X86_MOVBE) + ISAFLAG="$ISAFLAG -DHAVE_X86_MOVBE" fi + + # Check for ISA level support. + AC_CACHE_CHECK([for ISA level support], + libc_cv_have_x86_isa_level, [dnl +cat > conftest.c <<EOF +#include <sysdeps/x86/isa-level.h> +#if MINIMUM_X86_ISA_LEVEL >= 4 +libc_cv_have_x86_isa_level=4 +#elif MINIMUM_X86_ISA_LEVEL == 3 +libc_cv_have_x86_isa_level=3 +#elif MINIMUM_X86_ISA_LEVEL == 2 +libc_cv_have_x86_isa_level=2 +#else +libc_cv_have_x86_isa_level=baseline +#endif +EOF + eval `${CC-cc} $CFLAGS $CPPFLAGS $ISAFLAG -I$srcdir -E conftest.c | grep libc_cv_have_x86_isa_level` + rm -rf conftest*]) +else + libc_cv_have_x86_isa_level=baseline fi +LIBC_CONFIG_VAR([have-x86-isa-level], [$libc_cv_have_x86_isa_level]) +LIBC_CONFIG_VAR([x86-isa-level-3-or-above], [3 4]) LIBC_CONFIG_VAR([enable-x86-isa-level], [$libc_cv_include_x86_isa_level]) dnl Static PIE is supported. |