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| author | Florian Weimer <fweimer@redhat.com> | 2022-01-14 16:09:20 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-01-14 16:09:20 +0100 |
| commit | 5732a881aad24fac876f5505a212395048a7a483 (patch) | |
| tree | 1f24fa2a4c0f428768f4de43c1616e45ac081aee /sysdeps/x86/configure.ac | |
| parent | 047512374a95b7bc42a996f61def50843f2bd5e7 (diff) | |
| download | glibc-5732a881aad24fac876f5505a212395048a7a483.zip glibc-5732a881aad24fac876f5505a212395048a7a483.tar.gz glibc-5732a881aad24fac876f5505a212395048a7a483.tar.bz2 | |
x86: HAVE_X86_LAHF_SAHF, HAVE_X86_MOVBE and -march=x86-64-vN (bug 28782)
HAVE_X86_LAHF_SAHF is implied by x86-64-v2, and HAVE_X86_MOVBE by
x86-64-v3.
The individual flag does not appear in -fverbose-asm flag output
even if the ISA level implies it.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86/configure.ac')
| -rw-r--r-- | sysdeps/x86/configure.ac | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/x86/configure.ac b/sysdeps/x86/configure.ac index 04a12ab..10d5c2e 100644 --- a/sysdeps/x86/configure.ac +++ b/sysdeps/x86/configure.ac @@ -110,7 +110,7 @@ if test $libc_cv_include_x86_isa_level = yes; then AC_CACHE_CHECK([for LAHF/SAHF instruction support], libc_cv_have_x86_lahf_sahf, [dnl libc_cv_have_x86_lahf_sahf=no - if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -q "\-msahf"; then + if AC_TRY_COMMAND(${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 @@ -119,7 +119,7 @@ if test $libc_cv_include_x86_isa_level = yes; then AC_CACHE_CHECK([for MOVBE instruction support], libc_cv_have_x86_movbe, [dnl libc_cv_have_x86_movbe=no - if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS -fverbose-asm -S -o - -x c /dev/null) | grep -q "\-mmovbe"; then + if AC_TRY_COMMAND(${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 |