avcodec/x86/h264_weight: handle weight1=128

Fix ticket4596 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

avcodec/x86/h264_weight: handle weight1=128
Fix ticket4596 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
e1009665 · Michael Niedermayer · 7c9fcdfa · e1009665
Commit e1009665 authored Jun 09, 2015 by Michael Niedermayer
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h264_weight.asm libavcodec/x86/h264_weight.asm +3 -0

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--- a/libavcodec/x86/h264_weight.asm
+++ b/libavcodec/x86/h264_weight.asm
@@ -135,8 +135,11 @@ WEIGHT_FUNC_HALF_MM 8, 8
    add  off_regd, 1
    or   off_regd, 1
    add        r4, 1
+    cmp        r6d, 128
+     je .nonnormal
    cmp        r5, 128
     jne .normal
+.nonnormal
    sar        r5, 1
    sar        r6, 1
    sar  off_regd, 1