Andreas Rheinhardt cb054ee89b avcodec/x86/h264_chromamc: Add SSSE3 RV40 chroma motion compensation functions ...

The only difference between it and the H.264/VC-1 versions is the
bias constant which depends on the shift parameters for RV40.
This value ends up in a register and therefore one can reuse
the H.264 code by setting the registers for RV40 and then jumping
into the relevant H.264 function, making the four new functions
cheap (just 256 bytes in total). This approach uses one jump more
for the no-filter case and one jump less in the one-dimensional
case than an approach using separate functions.

avg_chroma_mc4_c:                                      167.5 ( 1.00x)
avg_chroma_mc4_mmxext:                                  48.1 ( 3.48x)
avg_chroma_mc4_ssse3:                                   31.1 ( 5.39x)
avg_chroma_mc8_c:                                      325.5 ( 1.00x)
avg_chroma_mc8_mmxext:                                 103.2 ( 3.15x)
avg_chroma_mc8_ssse3:                                   33.5 ( 9.71x)
put_chroma_mc4_c:                                      137.4 ( 1.00x)
put_chroma_mc4_mmx:                                     44.5 ( 3.09x)
put_chroma_mc4_ssse3:                                   28.4 ( 4.83x)
put_chroma_mc8_c:                                      271.4 ( 1.00x)
put_chroma_mc8_mmx:                                     99.9 ( 2.72x)
put_chroma_mc8_ssse3:                                   30.6 ( 8.86x)

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2025-11-01 13:34:00 +01:00

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