avcodec: [loongson] optimize get_cabac_inline

Multimedia / FFmpeg - Shiyou Yin [loongson.cn] - 19 September 2018 16:33 EDT

This optimization improved h264 decoding performance about 4%(from 74fps to 77fps, tested on loongson 3A3000).

ba175578d1 avcodec: [loongson] optimize get_cabac_inline.
libavcodec/cabac_functions.h | 3 ++
libavcodec/mips/cabac.h | 119 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 122 insertions(+)

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