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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-08-20 23:54:49 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-08-20 23:54:49 +0000 |
| commit | 4bf1790421554386abb8056feae98eaef93161ce (patch) | |
| tree | 9ee58342a910ff5ef6dd2c9d88eb8afa0bd7eea8 /libavcodec/i386/snowdsp_mmx.c | |
| parent | dd30437bbedbd92bd8d873463b5be8854bf8000f (diff) | |
| download | ffmpeg-4bf1790421554386abb8056feae98eaef93161ce.tar.gz | |
simplify, speedup and reduce needed headroom by 2 bits in the 3rd
vertical lifting step
Originally committed as revision 10162 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/i386/snowdsp_mmx.c')
| -rw-r--r-- | libavcodec/i386/snowdsp_mmx.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/libavcodec/i386/snowdsp_mmx.c b/libavcodec/i386/snowdsp_mmx.c index 17ac345664..7b3214dbb4 100644 --- a/libavcodec/i386/snowdsp_mmx.c +++ b/libavcodec/i386/snowdsp_mmx.c @@ -590,18 +590,17 @@ void ff_snow_vertical_compose97i_mmx(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTE snow_vertical_compose_mmx_sub("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6") snow_vertical_compose_mmx_store(REG_S,"mm0","mm2","mm4","mm6") "mov %2, %%"REG_a" \n\t" - snow_vertical_compose_mmx_load(REG_c,"mm1","mm3","mm5","mm7") snow_vertical_compose_mmx_add(REG_a,"mm0","mm2","mm4","mm6") - snow_vertical_compose_mmx_sll("2","mm1","mm3","mm5","mm7") - snow_vertical_compose_mmx_r2r_add("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6") + snow_vertical_compose_mmx_sra("2","mm0","mm2","mm4","mm6") + snow_vertical_compose_mmx_add(REG_c,"mm0","mm2","mm4","mm6") "pcmpeqd %%mm1, %%mm1 \n\t" "pslld $31, %%mm1 \n\t" - "psrld $28, %%mm1 \n\t" + "psrld $30, %%mm1 \n\t" "mov %1, %%"REG_S" \n\t" snow_vertical_compose_mmx_r2r_add("mm1","mm1","mm1","mm1","mm0","mm2","mm4","mm6") - snow_vertical_compose_mmx_sra("4","mm0","mm2","mm4","mm6") + snow_vertical_compose_mmx_sra("2","mm0","mm2","mm4","mm6") snow_vertical_compose_mmx_add(REG_c,"mm0","mm2","mm4","mm6") snow_vertical_compose_mmx_store(REG_c,"mm0","mm2","mm4","mm6") snow_vertical_compose_mmx_add(REG_S,"mm0","mm2","mm4","mm6") |