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Simplify and optimize the 4th vertical lifting step of the SSE2 code (untested) 

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

Originally committed as revision 10165 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-08-21 00:03:18 +00:00
parent d0dae46a90
commit 72dee89b5d
1 changed files with 1 additions and 2 deletions
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3
libavcodec/i386/snowdsp_mmx.c
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@ -498,9 +498,8 @@ void ff_snow_vertical_compose97i_sse2(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWT
snow_vertical_compose_sse2_store(REG_c,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_add(REG_S,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_move("xmm0","xmm2","xmm4","xmm6","xmm1","xmm3","xmm5","xmm7")
snow_vertical_compose_sse2_r2r_add("xmm0","xmm2","xmm4","xmm6","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_r2r_add("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_sra("1","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_r2r_add("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_add(REG_a,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_store(REG_a,"xmm0","xmm2","xmm4","xmm6")