From 5bc4851e3a8b0a9ac3de1594de6a80aaf052334a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sat, 29 Oct 2011 01:03:50 -0400
Subject: [PATCH] SDL_memcpyMMX(): Make sure srcskip and dstskip are 8-byte
 aligned.

Thanks to Patrick Baggett for the fix!
---
 src/video/SDL_blit_copy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/SDL_blit_copy.c b/src/video/SDL_blit_copy.c
index 96b727ee0..c0cdd23a1 100644
--- a/src/video/SDL_blit_copy.c
+++ b/src/video/SDL_blit_copy.c
@@ -127,7 +127,7 @@ SDL_BlitCopy(SDL_BlitInfo * info)
 #endif
 
 #ifdef __MMX__
-    if (SDL_HasMMX()) {
+    if (SDL_HasMMX() && !(srcskip & 7) && !(dstskip & 7)) {
         while (h--) {
             SDL_memcpyMMX(dst, src, w);
             src += srcskip;