Le sunnuntaina 5. toukokuuta 2024, 19.45.28 EEST u...@foxmail.com a écrit :
> From: sunyuechi <sunyue...@iscas.ac.cn>
>
> C908:
> vp8_put_bilin4_h_c: 373.5
> vp8_put_bilin4_h_rvv_i32: 158.7
> vp8_put_bilin8_h_c: 1437.7
> vp8_put_bilin8_h_rvv_i32: 318.7
> vp8_put_bilin16_h_c: 2845.7
> vp8_put_bilin16_h_rvv_i32: 374.7
> ---
> libavcodec/riscv/vp8dsp_init.c | 14 +++++++++++
> libavcodec/riscv/vp8dsp_rvv.S | 45 ++++++++++++++++++++++++++++++++++
> 2 files changed, 59 insertions(+)
>
> diff --git a/libavcodec/riscv/vp8dsp_init.c b/libavcodec/riscv/vp8dsp_init.c
> index fa3feeacf7..778d5ceb29 100644
> --- a/libavcodec/riscv/vp8dsp_init.c
> +++ b/libavcodec/riscv/vp8dsp_init.c
> @@ -34,6 +34,10 @@ VP8_EPEL(16, rvi);
> VP8_EPEL(8, rvi);
> VP8_EPEL(4, rvi);
>
> +VP8_BILIN(16, rvv);
> +VP8_BILIN(8, rvv);
> +VP8_BILIN(4, rvv);
> +
> av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
> {
> #if HAVE_RV
> @@ -48,6 +52,16 @@ av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
> c->put_vp8_epel_pixels_tab[2][0][0] = ff_put_vp8_pixels4_rvi;
> c->put_vp8_bilinear_pixels_tab[2][0][0] = ff_put_vp8_pixels4_rvi;
> }
> +#if HAVE_RVV
> + if (flags & AV_CPU_FLAG_RVV_I32 && ff_get_rv_vlenb() >= 16) {
> + c->put_vp8_bilinear_pixels_tab[0][0][1] = ff_put_vp8_bilin16_h_rvv;
> + c->put_vp8_bilinear_pixels_tab[0][0][2] =
> ff_put_vp8_bilin16_h_rvv; + c->put_vp8_bilinear_pixels_tab[1][0][1]
> = ff_put_vp8_bilin8_h_rvv; + c->put_vp8_bilinear_pixels_tab[1][0][2]
> = ff_put_vp8_bilin8_h_rvv; + c->put_vp8_bilinear_pixels_tab[2][0][1]
> = ff_put_vp8_bilin4_h_rvv; + c->put_vp8_bilinear_pixels_tab[2][0][2]
> = ff_put_vp8_bilin4_h_rvv; + }
> +#endif
> #endif
> }
>
> diff --git a/libavcodec/riscv/vp8dsp_rvv.S b/libavcodec/riscv/vp8dsp_rvv.S
> index 8a0773f964..760d9d3871 100644
> --- a/libavcodec/riscv/vp8dsp_rvv.S
> +++ b/libavcodec/riscv/vp8dsp_rvv.S
> @@ -20,6 +20,18 @@
>
> #include "libavutil/riscv/asm.S"
>
> +.macro vsetvlstatic8 len
> +.if \len <= 4
> + vsetivli zero, \len, e8, mf4, ta, ma
> +.elseif \len <= 8
> + vsetivli zero, \len, e8, mf2, ta, ma
> +.elseif \len <= 16
> + vsetivli zero, \len, e8, m1, ta, ma
> +.elseif \len <= 31
> + vsetivli zero, \len, e8, m2, ta, ma
> +.endif
> +.endm
> +
> .macro vp8_idct_dc_add
> vlse32.v v0, (a0), a2
> lh a5, 0(a1)
> @@ -71,3 +83,36 @@ func ff_vp8_idct_dc_add4uv_rvv, zve32x
>
> ret
> endfunc
> +
> +.macro bilin_h_load dst len
> + vsetvlstatic8 \len + 1
> + vle8.v \dst, (a2)
> + vslide1down.vx v2, \dst, t5
> + vsetvlstatic8 \len
Doesn't this effectively discard the last element, t5?
Can't we skip the slide and just load the vector at a2+1? Also then, we can
keep VL=len and halve the multipler.
> + vwmulu.vx v28, \dst, t1
> + vwmaccu.vx v28, a5, v2
> + vwaddu.wx v24, v28, t4
> + vnsra.wi \dst, v24, 3
> +.endm
> +
> +.macro put_vp8_bilin_h len
> +func ff_put_vp8_bilin\len\()_h_rvv, zve32x
> + li t1, 8
> + li t4, 4
> + li t5, 1
> + sub t1, t1, a5
> +1:
> + addi a4, a4, -1
> + bilin_h_load v0, \len
> + vse8.v v0, (a0)
> + add a2, a2, a3
> + add a0, a0, a1
> + bnez a4, 1b
> +
> + ret
> +endfunc
> +.endm
> +
> +.irp len 16,8,4
> +put_vp8_bilin_h \len
> +.endr
--
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