[FFmpeg-cvslog] r10163 - trunk/libavcodec/i386/snowdsp_mmx.c
michael
subversion
Tue Aug 21 01:59:20 CEST 2007
Author: michael
Date: Tue Aug 21 01:59:20 2007
New Revision: 10163
Log:
Simplify and speedup code, reduce needed headroom by 2 bits in the 3rd
vertical lifting step of the SSE2 code (untested)
Modified:
trunk/libavcodec/i386/snowdsp_mmx.c
Modified: trunk/libavcodec/i386/snowdsp_mmx.c
==============================================================================
--- trunk/libavcodec/i386/snowdsp_mmx.c (original)
+++ trunk/libavcodec/i386/snowdsp_mmx.c Tue Aug 21 01:59:20 2007
@@ -483,18 +483,17 @@ void ff_snow_vertical_compose97i_sse2(DW
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")
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