avcodec/x86/pngdsp: add missing emms at the end of add_png_paeth_prediction

Fixes unpredictable behavior with floats.

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 57a29f2e7dd2374a1df27316c6cf7c0225e86758)

diff --git a/libavcodec/x86/pngdsp.asm b/libavcodec/x86/pngdsp.asm
index 50e4255dec0e18581d5aa213a0e10a3ff915c845..726e6bc712b2c1b3406823c998345da685403b82 100644 (file)
--- a/libavcodec/x86/pngdsp.asm
+++ b/libavcodec/x86/pngdsp.asm
@@ -163,6 +163,7 @@ cglobal add_png_paeth_prediction, 5, 7, %1, dst, src, top, w, bpp, end, cntr
     dec              cntrq
     jge .bpp_loop
     POP               dstq
+    emms
     RET
 %endmacro