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Simplify and optimize the 4th vertical lifting step of the MMX code

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This also reduces the needed headroom in that step by 1 bit

Originally committed as revision 10164 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-08-21 00:02:19 +00:00
parent 1ffbbef217
commit d0dae46a90
1 changed files with 1 additions and 2 deletions
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3
libavcodec/i386/snowdsp_mmx.c
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@ -604,9 +604,8 @@ void ff_snow_vertical_compose97i_mmx(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTE
snow_vertical_compose_mmx_store(REG_c,"mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_add(REG_S,"mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_move("mm0","mm2","mm4","mm6","mm1","mm3","mm5","mm7")
snow_vertical_compose_mmx_r2r_add("mm0","mm2","mm4","mm6","mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_r2r_add("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_sra("1","mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_r2r_add("mm1","mm3","mm5","mm7","mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_add(REG_a,"mm0","mm2","mm4","mm6")
snow_vertical_compose_mmx_store(REG_a,"mm0","mm2","mm4","mm6")