[FFmpeg-devel] [PATCH v6] libswscale/ppc: VSX-optimize 9-16 bit yuv2planeX

Lauri Kasanen cand at gmx.com
Tue Feb 5 09:35:53 EET 2019

On Sun, 13 Jan 2019 10:26:20 +0200
Lauri Kasanen <cand at gmx.com> wrote:

> ./ffmpeg_g -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p16be \
> -s 1920x1728 -f null -vframes 100 -v error -nostats -
> 9-14 bit funcs get about 6x speedup, 16-bit gets about 15x.
> Fate passes, each format tested with an image to video conversion.
> Only POWER8 includes 32-bit vector multiplies, so POWER7 is locked out
> of the 16-bit function. This includes the vec_mulo/mule functions too,
> not just vmuluwm.


- Lauri

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