[FFmpeg-devel] [PATCH 3/4] swscale/x86/rgb2rgb: remove rgb24toyv12_mmxext

[Ramiro Polla]

On Wed, Aug 28, 2024 at 10:43 PM Ramiro Polla <ramiro.polla at gmail.com> wrote:
>
> The mmxext implementation is slower than the C version.
>
> rgb24toyv12_16_200_c:                                14812.6 ( 1.00x)
> rgb24toyv12_16_200_mmxext:                           17400.4 ( 0.85x)
> rgb24toyv12_128_60_c:                                35616.9 ( 1.00x)
> rgb24toyv12_128_60_mmxext:                           39610.4 ( 0.90x)
> rgb24toyv12_512_16_c:                                37209.4 ( 1.00x)
> rgb24toyv12_512_16_mmxext:                           41136.2 ( 0.90x)
> rgb24toyv12_1920_4_c:                                34737.4 ( 1.00x)
> rgb24toyv12_1920_4_mmxext:                           34818.9 ( 1.00x)
> rgb24toyv12_1920_4_negstride_c:                      34855.2 ( 1.00x)
> rgb24toyv12_1920_4_negstride_mmxext:                 34773.7 ( 1.00x)
> ---
>  libswscale/x86/rgb2rgb.c | 207 ---------------------------------------
>  1 file changed, 207 deletions(-)

It's actually still faster under x86_32. New patch attached only
disables it for x86_64 instead of removing it.
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