[Pixman] [PATCH 2/4] Disable MMX when incompatible clang is being used.
Jeremy Huddleston
jeremyhu at apple.com
Thu Mar 8 09:41:32 PST 2012
Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
---
configure.ac | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/configure.ac b/configure.ac
index c3c711c..1ca3c02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -297,6 +297,15 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <mmintrin.h>
int main () {
__m64 v = _mm_cvtsi32_si64 (1);
+ __m64 w;
+ int8_t x;
+
+ /* Some versions of clang will choke on K */
+ asm ("pshufw %2, %1, %0\n\t"
+ : "=y" (v)
+ : "y" (w), "K" (x)
+ );
+
return _mm_cvtsi64_si32 (v);
}]])], have_mmx_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS
--
1.7.9
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