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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-02-09 12:37:38 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-02-09 12:37:38 +0000 |
| commit | 7c4fd7eb0c8d05041a879c5ad69319d6161a6bd8 (patch) | |
| tree | 1d17b22ee315a18d4e7480688f44d386b3c3ee22 /libavcodec/i386 | |
| parent | 9301a0b4a9f640b24e6dcaa71ce1be53fdee7b48 (diff) | |
| download | ffmpeg-streaming-7c4fd7eb0c8d05041a879c5ad69319d6161a6bd8.zip ffmpeg-streaming-7c4fd7eb0c8d05041a879c5ad69319d6161a6bd8.tar.gz | |
factor out common subexprssion (gcc of course is too stupid to do this ...)
5% faster avg_h264_chroma_mc2_mmx2()
10% faster put_h264_chroma_mc2_mmx2()
Originally committed as revision 7898 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/i386')
| -rw-r--r-- | libavcodec/i386/dsputil_h264_template_mmx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/i386/dsputil_h264_template_mmx.c b/libavcodec/i386/dsputil_h264_template_mmx.c index 4eefc8b..f85c992 100644 --- a/libavcodec/i386/dsputil_h264_template_mmx.c +++ b/libavcodec/i386/dsputil_h264_template_mmx.c @@ -265,8 +265,9 @@ static void H264_CHROMA_MC4_TMPL(uint8_t *dst/*align 4*/, uint8_t *src/*align 1* #ifdef H264_CHROMA_MC2_TMPL static void H264_CHROMA_MC2_TMPL(uint8_t *dst/*align 2*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y) { - int CD=((1<<16)-1)*x*y + 8*y; - int AB=((8<<16)-8)*x + 64 - CD; + int tmp = ((1<<16)-1)*x + 8; + int CD= tmp*y; + int AB= (tmp<<3) - CD; asm volatile( /* mm5 = {A,B,A,B} */ /* mm6 = {C,D,C,D} */ |
