mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
29807a271e
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>
125 lines
3.6 KiB
Plaintext
125 lines
3.6 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
|
|
# Local configure fragment for sysdeps/x86.
|
|
|
|
# Check if linker supports x86 ISA level.
|
|
AC_CACHE_CHECK([for linker x86 ISA level support],
|
|
libc_cv_include_x86_isa_level, [dnl
|
|
cat > conftest1.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x1
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
cat > conftest2.S <<EOF
|
|
#ifdef __LP64__
|
|
# define P2ALIGN 3
|
|
#else
|
|
# define P2ALIGN 2
|
|
#endif
|
|
.section ".note.gnu.property", "a"
|
|
.p2align P2ALIGN
|
|
.long 1f - 0f /* name length. */
|
|
.long 4f - 1f /* data length. */
|
|
/* NT_GNU_PROPERTY_TYPE_0 */
|
|
.long 5 /* note type. */
|
|
0:
|
|
.asciz "GNU" /* vendor name. */
|
|
1:
|
|
.p2align P2ALIGN
|
|
/* GNU_PROPERTY_X86_ISA_1_NEEDED */
|
|
.long 0xc0008002 /* pr_type. */
|
|
.long 3f - 2f /* pr_datasz. */
|
|
2:
|
|
.long 0x2
|
|
3:
|
|
.p2align P2ALIGN
|
|
4:
|
|
EOF
|
|
libc_cv_include_x86_isa_level=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -nostartfiles -nostdlib -r -o conftest conftest1.S conftest2.S); then
|
|
count=`LC_ALL=C $READELF -n conftest | grep NT_GNU_PROPERTY_TYPE_0 | wc -l`
|
|
if test "$count" = 1; then
|
|
libc_cv_include_x86_isa_level=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_include_x86_isa_level = yes; then
|
|
AC_DEFINE(INCLUDE_X86_ISA_LEVEL)
|
|
AC_CACHE_CHECK([for LAHF/SAHF instruction support],
|
|
libc_cv_have_x86_lahf_sahf, [dnl
|
|
libc_cv_have_x86_lahf_sahf=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -qE '(-msahf\b|-march=x86-64-v)'; then
|
|
libc_cv_have_x86_lahf_sahf=yes
|
|
fi])
|
|
if test $libc_cv_have_x86_lahf_sahf = yes; then
|
|
AC_DEFINE(HAVE_X86_LAHF_SAHF)
|
|
ISAFLAG="-DHAVE_X86_LAHF_SAHF"
|
|
fi
|
|
AC_CACHE_CHECK([for MOVBE instruction support],
|
|
libc_cv_have_x86_movbe, [dnl
|
|
libc_cv_have_x86_movbe=no
|
|
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -qE '(-mmovbe\b|-march=x86-64-v(@<:@3-9@:>@|@<:@1-9@:>@@<:@0-9@:>@))'; then
|
|
libc_cv_have_x86_movbe=yes
|
|
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
|
|
#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=0
|
|
#endif
|
|
EOF
|
|
eval `${CC-cc} $CFLAGS $CPPFLAGS $ISAFLAG -I$srcdir -E conftest.c | grep libc_cv_have_x86_isa_level`
|
|
rm -rf conftest*])
|
|
elif test $base_machine = x86_64; then
|
|
libc_cv_have_x86_isa_level=baseline
|
|
else
|
|
libc_cv_have_x86_isa_level=0
|
|
fi
|
|
if test $libc_cv_have_x86_isa_level = baseline; then
|
|
AC_DEFINE_UNQUOTED(MINIMUM_X86_ISA_LEVEL, 1)
|
|
else
|
|
AC_DEFINE_UNQUOTED(MINIMUM_X86_ISA_LEVEL, $libc_cv_have_x86_isa_level)
|
|
fi
|
|
LIBC_CONFIG_VAR([have-x86-isa-level], [$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.
|
|
AC_DEFINE(SUPPORT_STATIC_PIE)
|