[FFmpeg-devel] [PATCH] libavfilter/af_afir: R-V V dcmul_add

[Rémi Denis-Courmont]

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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