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| author | H.J. Lu <hjl.tools@gmail.com> | 2024-06-11 20:14:56 -0700 |
|---|---|---|
| committer | Sam James <sam@gentoo.org> | 2024-06-15 11:13:10 +0100 |
| commit | f05638731eeaae70c53b4fb30bfc58bc3c52a6d5 (patch) | |
| tree | 60deae0518eafa1d46f4f518f87e44640dd43b9e | |
| parent | b7f5b0a7114e29577daf64e68970673b61e5fcba (diff) | |
| download | glibc-f05638731eeaae70c53b4fb30bfc58bc3c52a6d5.zip glibc-f05638731eeaae70c53b4fb30bfc58bc3c52a6d5.tar.gz glibc-f05638731eeaae70c53b4fb30bfc58bc3c52a6d5.tar.bz2 | |
x86: Properly set x86 minimum ISA level [BZ #31883]
Properly set libc_cv_have_x86_isa_level in shell for MINIMUM_X86_ISA_LEVEL
defined as
(__X86_ISA_V1 + __X86_ISA_V2 + __X86_ISA_V3 + __X86_ISA_V4)
Also set __X86_ISA_V2 to 1 for i386 if __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
is defined. There are no changes in config.h nor in config.make on x86-64.
On i386, -march=x86-64-v2 with GCC generates
#define MINIMUM_X86_ISA_LEVEL 2
in config.h and
have-x86-isa-level = 2
in config.make. This fixes BZ #31883.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
(cherry picked from commit 29807a271edca3e47195bda0c69ae45e245551a9)
| -rw-r--r-- | sysdeps/x86/configure | 4 | ||||
| -rw-r--r-- | sysdeps/x86/configure.ac | 4 | ||||
| -rw-r--r-- | sysdeps/x86/isa-level.h | 12 |
3 files changed, 17 insertions, 3 deletions
diff --git a/sysdeps/x86/configure b/sysdeps/x86/configure index 1e2325d..04c6ba3 100644 --- a/sysdeps/x86/configure +++ b/sysdeps/x86/configure @@ -141,8 +141,10 @@ libc_cv_have_x86_isa_level=3 libc_cv_have_x86_isa_level=2 #elif defined __x86_64__ libc_cv_have_x86_isa_level=baseline +#elif MINIMUM_X86_ISA_LEVEL == 1 +libc_cv_have_x86_isa_level=1 #else -libc_cv_have_x86_isa_level=MINIMUM_X86_ISA_LEVEL +libc_cv_have_x86_isa_level=0 #endif EOF eval `${CC-cc} $CFLAGS $CPPFLAGS $ISAFLAG -I$srcdir -E conftest.c | grep libc_cv_have_x86_isa_level` diff --git a/sysdeps/x86/configure.ac b/sysdeps/x86/configure.ac index 0b32fdf..8a259d3 100644 --- a/sysdeps/x86/configure.ac +++ b/sysdeps/x86/configure.ac @@ -98,8 +98,10 @@ libc_cv_have_x86_isa_level=3 libc_cv_have_x86_isa_level=2 #elif defined __x86_64__ libc_cv_have_x86_isa_level=baseline +#elif MINIMUM_X86_ISA_LEVEL == 1 +libc_cv_have_x86_isa_level=1 #else -libc_cv_have_x86_isa_level=MINIMUM_X86_ISA_LEVEL +libc_cv_have_x86_isa_level=0 #endif EOF eval `${CC-cc} $CFLAGS $CPPFLAGS $ISAFLAG -I$srcdir -E conftest.c | grep libc_cv_have_x86_isa_level` diff --git a/sysdeps/x86/isa-level.h b/sysdeps/x86/isa-level.h index 2c7f742..03c1fe2 100644 --- a/sysdeps/x86/isa-level.h +++ b/sysdeps/x86/isa-level.h @@ -35,7 +35,17 @@ # define __X86_ISA_V1 0 #endif -#if __X86_ISA_V1 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \ +#ifdef __x86_64__ +# ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 +# define __GCC_HAVE_SYNC_COMPARE_AND_SWAP +# endif +#else +# ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 +# define __GCC_HAVE_SYNC_COMPARE_AND_SWAP +# endif +#endif + +#if __X86_ISA_V1 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP \ && defined HAVE_X86_LAHF_SAHF && defined __POPCNT__ && defined __SSE3__ \ && defined __SSSE3__ && defined __SSE4_1__ && defined __SSE4_2__ /* NB: ISAs in x86-64 ISA level v2 are used. */ |