diff options
| author | sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> | 2010-09-28 19:59:47 +0000 |
|---|---|---|
| committer | sewardj <sewardj@a5019735-40e9-0310-863c-91ae7b9d1cf9> | 2010-09-28 19:59:47 +0000 |
| commit | e3ae8a3c0768f7fe0d2627e6f889bff3c4c053ec (patch) | |
| tree | 4c7c7964c5f55ba0061ac8217a22ef59a85c7052 /configure.in | |
| parent | 6586493ebad047585abb11174152ad349a1ec4c8 (diff) | |
Test cases for amd64 PCLMULDQ (Emmanuel Thome, Emmanuel.Thome@gmail.com).
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11389 a5019735-40e9-0310-863c-91ae7b9d1cf9
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 424a4047..667ca243 100644 --- a/configure.in +++ b/configure.in @@ -1410,6 +1410,28 @@ AC_MSG_RESULT([no]) AM_CONDITIONAL(BUILD_SSSE3_TESTS, test x$ac_have_as_ssse3 = xyes) +# Note: we're really checking the assembler-level support, not gcc's ; +# C-level code might require the flag -mpclmul be passed to gcc (e.g. to +# compile code which uses wmmintrin.h). Doesn't matter since tests also +# use inline assembly directly +AC_MSG_CHECKING([if x86/amd64 assembler supports 'pclmulqdq']) +AC_TRY_COMPILE(, [ + do { + __asm__ __volatile__( + "pclmulqdq \$17,%%xmm6,%%xmm7" : : : "xmm6", "xmm7" ); } + while (0) +], +[ +ac_have_as_pclmulqdq=yes +AC_MSG_RESULT([yes]) +], [ +ac_have_as_pclmulqdq=no +AC_MSG_RESULT([no]) +]) + +AM_CONDITIONAL(BUILD_PCLMULQDQ_TESTS, test x$ac_have_as_pclmulqdq = xyes) + + AC_MSG_CHECKING([if x86/amd64 assembler supports 'lzcnt']) AC_TRY_COMPILE([], [ |