From 7c4fd7eb0c8d05041a879c5ad69319d6161a6bd8 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 9 Feb 2007 12:37:38 +0000 Subject: [PATCH] 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 --- libavcodec/i386/dsputil_h264_template_mmx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavcodec/i386/dsputil_h264_template_mmx.c b/libavcodec/i386/dsputil_h264_template_mmx.c index 4eefc8b685..f85c99246a 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} */