util: Move _mm_shuffle_epi8() to u_sse.h.

It's bound to be useful elsewhere.

1 files changed, 29 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_sse.h b/src/gallium/auxiliary/util/u_sse.h
index 6145e34aa3f..87959ab0aab 100644
--- a/src/gallium/auxiliary/util/u_sse.h
+++ b/src/gallium/auxiliary/util/u_sse.h
@@ -71,6 +71,35 @@ _mm_castps_si128(__m128 a)
 
 #endif /* defined(_MSC_VER) && _MSC_VER < 1500 */
 
+
+#if defined(PIPE_ARCH_SSSE3)
+
+#include <tmmintrin.h>
+
+#else /* !PIPE_ARCH_SSSE3 */
+
+#include <emmintrin.h>
+
+/**
+ * Describe _mm_shuffle_epi8() with gcc extended inline assembly, for cases
+ * where -mssse3 is not supported/enabled.
+ *
+ * MSVC will never get in here as its intrinsics support do not rely on
+ * compiler command line options.
+ */
+static __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_shuffle_epi8(__m128i a, __m128i mask)
+{
+    __m128i result;
+    __asm__("pshufb %1, %0"
+            : "=x" (result)
+            : "xm" (mask), "0" (a));
+    return result;
+}
+
+#endif /* !PIPE_ARCH_SSSE3 */
+
+
 #endif /* PIPE_ARCH_X86 || PIPE_ARCH_X86_64 */
 
 #endif /* U_SSE_H_ */