From: "Rémi Denis-Courmont" <remi@remlab.net>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] libavfilter/af_afir: R-V V dcmul_add
Date: Thu, 21 Dec 2023 22:52:17 +0200
Message-ID: <2143639.jzCLGs0xOv@basile.remlab.net> (raw)
In-Reply-To: <CAEa-L+tbhx4WFeSACUszR-Q4NsHy-mOYGidN+1=E_yRAC0x68A@mail.gmail.com>
Le tiistaina 19. joulukuuta 2023, 4.53.12 EET flow gg a écrit :
> c908:
> dcmul_add_c: 88.0
> dcmul_add_rvv_f64: 46.2
>
> Did not use vlseg2e64, because it is much slower than vlse64
> Did not use vsseg2e64, because it is slightly slower than vsse64
Is this about C910 or C908? I have not checked this specific function, but the
general understanding for C908 has been the exact opposite so far, i.e.
segmented accesses are fast, while strided accesses are (unsurprisingly) slow.
See also https://camel-cdr.github.io/rvv-bench-results/canmv_k230/index.html
--
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next prev parent reply other threads:[~2023-12-21 20:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-19 2:53 flow gg
2023-12-21 20:52 ` Rémi Denis-Courmont [this message]
2023-12-22 1:41 ` flow gg
2023-12-22 15:45 ` Rémi Denis-Courmont
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