1 files changed, 11 insertions, 4 deletions
diff --git a/configure.ac b/configure.ac
index 8370844..2178126 100644
--- a/configure.ac
+++ b/configure.ac
@@ -347,14 +347,21 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #error "Need GCC >= 3.4 for MMX intrinsics"
 #endif
 #include <mmintrin.h>
-#include <xmmintrin.h>
 int main () {
     __m64 v = _mm_cvtsi32_si64 (1);
     __m64 w;
 
-    /* Test some intrinsics from xmmintrin.h */
-    w = _mm_shuffle_pi16(v, 5);
-    w = _mm_mulhi_pu16(w, w);
+    /* Some versions of clang will choke on K */
+    asm ("pshufw %2, %1, %0\n\t"
+        : "=y" (w)
+        : "y" (v), "K" (5)
+    );
+
+    /* Some versions of clang will choke on this */
+    asm ("pmulhuw %1, %0\n\t"
+	: "+y" (w)
+	: "y" (v)
+    );
 
     return _mm_cvtsi64_si32 (v);
 }]])], have_mmx_intrinsics=yes)