avcodec/mpegvideo_enc: Add missing emms_c() to clear MMX state after SIMD use

Fixes undefined behavior due to calling libc allocation with unclean FPU state

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index f34003e..1540e5c 100644 (file)
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -1320,6 +1320,7 @@ static int load_input_picture(MpegEncContext *s, const AVFrame *pic_arg)
                                                 EDGE_BOTTOM);
                     }
                 }
+                emms_c();
             }
         }
         ret = av_frame_copy_props(pic->f, pic_arg);