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| author | Richard Henderson <rth@redhat.com> | 2011-11-09 16:29:38 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2011-11-09 16:29:38 -0800 |
| commit | 430616e7a7a321e216aeaeccc3da35aa23c0080f (patch) | |
| tree | c7c77fdbc7b50f224cc4d0500b462b578274d47f /libitm/acinclude.m4 | |
| parent | 41582ffe43fa994c13d0e5225f96a02cb0995c99 (diff) | |
| download | gcc-430616e7a7a321e216aeaeccc3da35aa23c0080f.tar.gz | |
libitm: Work around assembler missing AVX insns.
From-SVN: r181246
Diffstat (limited to 'libitm/acinclude.m4')
| -rw-r--r-- | libitm/acinclude.m4 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libitm/acinclude.m4 b/libitm/acinclude.m4 index 8fcde4b57ad..58fbf424c60 100644 --- a/libitm/acinclude.m4 +++ b/libitm/acinclude.m4 @@ -95,6 +95,20 @@ AC_DEFUN([LIBITM_CHECK_SIZE_T_MANGLING], [ [Define to the letter to which size_t is mangled.]) ]) +dnl Check if as supports AVX instructions. +AC_DEFUN([LIBITM_CHECK_AS_AVX], [ +case "${target_cpu}" in +i[3456]86 | x86_64) + AC_CACHE_CHECK([if the assembler supports AVX], libitm_cv_as_avx, [ + AC_TRY_COMPILE([], [asm("vzeroupper");], + [libitm_cv_as_avx=yes], [libitm_cv_as_avx=no]) + ]) + if test x$libitm_cv_as_avx = xyes; then + AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.]) + fi + ;; +esac]) + sinclude(../libtool.m4) dnl The lines below arrange for aclocal not to bring an installed dnl libtool.m4 into aclocal.m4, while still arranging for automake to |