[FFmpeg-devel] [PATCHv4 4/4] lavc/huffyuvdsp: optimise RVV vtype for add_hfyu_left_pred_bgr32

[Rémi Denis-Courmont]

Le torstaina 16. toukokuuta 2024, 19.48.40 EEST Rémi Denis-Courmont a écrit :
> T-Head C908:
> add_hfyu_left_pred_bgr32_c:       237.5
> add_hfyu_left_pred_bgr32_rvv_i32: 173.5 (before)
> add_hfyu_left_pred_bgr32_rvv_i32: 110.0 (after)
> ---
>  libavcodec/riscv/huffyuvdsp_rvv.S | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/libavcodec/riscv/huffyuvdsp_rvv.S
> b/libavcodec/riscv/huffyuvdsp_rvv.S index 9c4434907d..d334f5c6d0 100644
> --- a/libavcodec/riscv/huffyuvdsp_rvv.S
> +++ b/libavcodec/riscv/huffyuvdsp_rvv.S
> @@ -36,8 +36,10 @@ func ff_add_int16_rvv, zve32x
>          ret
>  endfunc
> 
> -func ff_add_hfyu_left_pred_bgr32_rvv, zve32x
> -        vsetivli zero, 4, e8, m1, ta, ma
> +func ff_add_hfyu_left_pred_bgr32_rvv, zve32x, zbb
> +        vtype_ivli t1, 4, e8, ta, ma
> +        li      t0, 4
> +        vsetvl  zero, t0, t1
>          vle8.v  v8, (a3)
>          sh2add  a2, a2, a1
>  1:

Missing Zvbb check in init.c will be added.

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