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Switch targets before trying to compile SIMD headers

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This commit is contained in:
Frank Denis 2013-04-25 19:47:21 -07:00
parent 5f226a23a1
commit 4fff338810
1 changed files with 25 additions and 1 deletions
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26
configure.ac
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@ -148,7 +148,29 @@ AS_IF([test -d /usr/local/lib], [
])
dnl Checks for headers
AC_CHECK_HEADERS([emmintrin.h tmmintrin.h smmintrin.h immintrin.h x86intrin.h])
AC_CHECK_HEADERS([emmintrin.h], [], [], [
#pragma GCC target("sse2")
])
AC_CHECK_HEADERS([tmmintrin.h], [], [], [
#pragma GCC target("sse3")
])
AC_CHECK_HEADERS([smmintrin.h], [], [], [
#pragma GCC target("sse4.1")
])
AC_CHECK_HEADERS([immintrin.h], [], [], [
#pragma GCC target("avx")
])
AC_CHECK_HEADERS([x86intrin.h], [], [], [
#pragma GCC target("xop")
])
AC_CHECK_HEADERS([wmmintrin.h], [], [], [
#pragma GCC target("aes")
])
dnl Checks for typedefs, structures, and compiler characteristics.
@ -184,6 +206,8 @@ AC_MSG_CHECKING(for cpuid instruction)
HAVE_CPUID_V=0
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]], [[
unsigned int level = 0;
unsigned int *eax = NULL, *ebx = NULL, *ecx = NULL, *edx = NULL;
__asm__("cpuid" : "=a"(*eax), "=b" (*ebx), "=c"(*ecx), "=d"(*edx)
: "0"(level));
]])],