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Simplify and speedup code, reduce needed headroom by 2 bits in the 3rd

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vertical lifting step of the SSE2 code (untested)

Originally committed as revision 10163 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-08-20 23:59:20 +00:00
parent 4bf1790421
commit 1ffbbef217
1 changed files with 4 additions and 5 deletions
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9
libavcodec/i386/snowdsp_mmx.c
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@ -483,18 +483,17 @@ void ff_snow_vertical_compose97i_sse2(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWT
snow_vertical_compose_sse2_sub("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_store(REG_S,"xmm0","xmm2","xmm4","xmm6")
"mov %2, %%"REG_a" \n\t"
snow_vertical_compose_sse2_load(REG_c,"xmm1","xmm3","xmm5","xmm7")
snow_vertical_compose_sse2_add(REG_a,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_sll("2","xmm1","xmm3","xmm5","xmm7")\
snow_vertical_compose_sse2_r2r_add("xmm1","xmm3","xmm5","xmm7","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_sra("2","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_add(REG_c,"xmm0","xmm2","xmm4","xmm6")
"pcmpeqd %%xmm1, %%xmm1 \n\t"
"pslld $31, %%xmm1 \n\t"
"psrld $28, %%xmm1 \n\t"
"psrld $30, %%xmm1 \n\t"
"mov %1, %%"REG_S" \n\t"
snow_vertical_compose_sse2_r2r_add("xmm1","xmm1","xmm1","xmm1","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_sra("4","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_sra("2","xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_add(REG_c,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_store(REG_c,"xmm0","xmm2","xmm4","xmm6")
snow_vertical_compose_sse2_add(REG_S,"xmm0","xmm2","xmm4","xmm6")