Hi, I got BananaPi F3, made some fixes, updated in reply Rémi Denis-Courmont <r...@remlab.net> 于2024年5月6日周一 03:26写道：
> Le sunnuntaina 5. toukokuuta 2024, 12.18.56 EEST flow gg a écrit : > > > Does MF2 actually improve perfs over M1 here? > > > > The difference here seems very small, but when both mf2 and m1 are > correct, > > the test results have only shown mf2 to be better, so I want to use mf2. > > I can live with that. But this is a slippery slope because large vector > sizes > would involve even smaller fractions. Then we would need to compute the > value > which might negate the performance gains from fractional multipliers. > > The fastest approach that I can think of is a symbolic LA (which expands > to > 1xAUIPC + 1xLA) to load a precomputed VTYPE value from a static variable. > Furthermore, this requires VSETVL, which precludes immediate constant VL > Indeed, the VSETIVL instruction does not exist. > > AFAIU, BananaPi F3 has 256-bit vectors already now. > > -- > Rémi Denis-Courmont > http://www.remlab.net/ > > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
