avcodec/mips: [loongson] refine optimization in h264_chroma.

Remove invalid operation in the case x and y all equal 0, this refine made about 2% speedup for H264 decode on loongson platform. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

avcodec/mips: [loongson] refine optimization in h264_chroma.
Remove invalid operation in the case x and y all equal 0, this refine made about 2% speedup for H264 decode on loongson platform. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
5982614a · Shiyou Yin · Michael Niedermayer · 5c806d5b · 5982614a
Commit 5982614a authored Nov 06, 2018 by Shiyou Yin Committed by Michael Niedermayer Dec 01, 2018
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h264chroma_mmi.c libavcodec/mips/h264chroma_mmi.c +426 -544

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--- a/libavcodec/mips/h264chroma_mmi.c
+++ b/libavcodec/mips/h264chroma_mmi.c