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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
| commit | ed72b6545f6d20f2d29ed71d65394d4a75ad358e (patch) | |
| tree | e47730c47098dfbf1d41d95210009fd4a5fc0e5c /sysdeps/i386/configure.in | |
| parent | 8d4f46c613c4397c5531b959744541862cf09ad0 (diff) | |
| download | glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.gz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.xz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.zip | |
Check for FMA4 support and generate appropriate fma functions
Diffstat (limited to 'sysdeps/i386/configure.in')
| -rw-r--r-- | sysdeps/i386/configure.in | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sysdeps/i386/configure.in b/sysdeps/i386/configure.in index 67fd1d7df1..5a9840e16c 100644 --- a/sysdeps/i386/configure.in +++ b/sysdeps/i386/configure.in @@ -67,6 +67,17 @@ if test $libc_cv_cc_avx = yes; then AC_DEFINE(HAVE_AVX_SUPPORT) fi +dnl Check if -mfma4 works. +AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl +if AC_TRY_COMMAND([${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null]); then + libc_cv_cc_fma4=yes +else + libc_cv_cc_fma4=no +fi]) +if test $libc_cv_cc_fma4 = yes; then + AC_DEFINE(HAVE_FMA4_SUPPORT) +fi + dnl Check if -mno-vzeroupper works. AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl if AC_TRY_COMMAND([${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null]); then |