[FFmpeg-devel] [PATCH 3/5] lavc/vvc_mc: R-V V put_uni_pixels
Rémi Denis-Courmont
remi at remlab.net
Sat Oct 19 13:55:46 EEST 2024
Le perjantaina 11. lokakuuta 2024, 13.40.20 EEST uk7b at foxmail.com a écrit :
> From: sunyuechi <sunyuechi at iscas.ac.cn>
> +.macro put_uni_pixels w, vlen, id
> +\id\w\vlen:
> +.if \w == 128 && \vlen == 128
> + li t0, \w
> + vsetvli zero, t0, e8, m8, ta, ma
> +.else
> + vsetvlstatic8 \w, \vlen
> +.endif
> +1:
> + vle8.v v0, (a2)
> + addi a4, a4, -1
> + vse8.v v0, (a0)
> + add a2, a2, a3
> + add a0, a0, a1
> + bnez a4, 1b
> + ret
Up to 64-bit rows, you can use strided loads and stores here.
Though for memory copying, unaligned scalar accesses might be just as fast.
--
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