From 755b84504a95edf1ad8f6c84c6d71d098856dbce Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 16 Dec 2009 03:02:31 +0000
Subject: [PATCH] Fixed bug #736

Don't use the SSE cache instruction in MMX code if SSE isn't available. :)
---
 src/video/SDL_blit_copy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/video/SDL_blit_copy.c b/src/video/SDL_blit_copy.c
index 9009b9ae5..bf7fd2dc6 100644
--- a/src/video/SDL_blit_copy.c
+++ b/src/video/SDL_blit_copy.c
@@ -65,7 +65,9 @@ SDL_memcpyMMX(Uint8 * dst, const Uint8 * src, int len)
 
     __m64 values[8];
     for (i = len / 64; i--;) {
+#ifdef __SSE__
         _mm_prefetch(src, _MM_HINT_NTA);
+#endif
         values[0] = *(__m64 *) (src + 0);
         values[1] = *(__m64 *) (src + 8);
         values[2] = *(__m64 *) (src + 16);