[FFmpeg-devel] [PATCH v3 1/9] lavc/vp8dsp: R-V put_vp8_pixels

[flow gg]

Wow, got it

Rémi Denis-Courmont <remi at remlab.net> 于2024年5月11日周六 22:39写道：

> Le maanantaina 6. toukokuuta 2024, 6.38.01 EEST uk7b at foxmail.com a écrit :
> > From: sunyuechi <sunyuechi at iscas.ac.cn>
> >
> > C908:
> > vp8_put_pixels4_c: 78.0
> > vp8_put_pixels4_rvi: 33.7
> > vp8_put_pixels8_c: 278.0
> > vp8_put_pixels8_rvi: 55.0
> > vp8_put_pixels16_c: 999.0
> > vp8_put_pixels16_rvi: 86.7
>
> Actually, I do think that the C compiler is doing a better job.
> On SiFive U74, the figures are horrible:
>
> By time:
> vp8_put_pixels4_c:     0.2
> vp8_put_pixels4_rvi:  10.5
> vp8_put_pixels8_c:     1.0
> vp8_put_pixels8_rvi:  30.0
> vp8_put_pixels16_c:    2.2
> vp8_put_pixels16_rvi: 60.0
>
> By cycles:
> vp8_put_pixels4_c:       84.0
> vp8_put_pixels4_rvi:   3871.0
> vp8_put_pixels8_c:      331.0
> vp8_put_pixels8_rvi:  11281.2
> vp8_put_pixels16_c:     826.0
> vp8_put_pixels16_rvi: 22502.0
>
> Best guess is that the data is not 64-bit aligned, otherwise I can't
> really
> make sense of those figures.
>
> --
> Rémi Denis-Courmont
> http://www.remlab.net/
>
>
>
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