[FFmpeg-cvslog] dsp: fix diff_bytes_mmx() with small width

[Michael Niedermayer]

ffmpeg | branch: release/0.10 | Michael Niedermayer <michaelni at gmx.at> | Sat Mar 17 20:45:45 2012 +0100| [df93682e64e0e917d96c8af6519a2793c28117c5] | committer: Michael Niedermayer

dsp: fix diff_bytes_mmx() with small width

Fixes Ticket1068

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 73089eccd3e48539555349b36d8aabbf1cea416e)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=df93682e64e0e917d96c8af6519a2793c28117c5
---

 libavcodec/x86/dsputilenc_mmx.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/libavcodec/x86/dsputilenc_mmx.c b/libavcodec/x86/dsputilenc_mmx.c
index f13c121..35d50be 100644
--- a/libavcodec/x86/dsputilenc_mmx.c
+++ b/libavcodec/x86/dsputilenc_mmx.c
@@ -823,6 +823,7 @@ static int vsad16_mmx2(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, i
 
 static void diff_bytes_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
     x86_reg i=0;
+    if(w>=16)
     __asm__ volatile(
         "1:                             \n\t"
         "movq  (%2, %0), %%mm0          \n\t"