[FFmpeg-devel] [PATCH v2] lavc/vvc_mc: R-V V avg w_avg
flow gg
hlefthleft at gmail.com
Sat Jun 1 21:02:33 EEST 2024
> In keeping in line with the rest of the project, that should probably go
into
> **libavcodec/riscv/vvc/**
> Expanding the macro 49 times, with up to 14 **branches** to get there is
maybe not
> such a great idea. It might look nice on the checkasm µbenchmarks because
the
> branches under test get predicted and cached.
>
> But in real use, branch prediction will not work so well, and the I-cache
will be filled with all variants of the same function.
>
> Indeed, this seems to result in about .5 MiB of code.
>
> Even if only one half is needed (128-bit or 256+-bit variants). that's a
lot.
>
> For comparison, x86 uses just about 10 KiB, also with two variants.
>
> What I make out from the arcane forbidden CISC arts there:
>
> - functions are specialised only in one dimension, not both,
> - dispatch tables avoid multiplying branches.
Referring to x86, the code has been updated. The current code size is 6k,
and a jmp table has been added.
<uk7b at foxmail.com> 于2024年6月2日周日 02:01写道：
> From: sunyuechi <sunyuechi at iscas.ac.cn>
>
> C908 X60
> avg_8_2x2_c : 1.0 1.0
> avg_8_2x2_rvv_i32 : 1.0 1.0
> avg_8_2x4_c : 1.7 2.0
> avg_8_2x4_rvv_i32 : 1.2 1.2
> avg_8_2x8_c : 3.7 4.0
> avg_8_2x8_rvv_i32 : 2.0 2.0
> avg_8_2x16_c : 7.2 7.5
> avg_8_2x16_rvv_i32 : 3.2 3.0
> avg_8_2x32_c : 14.2 15.0
> avg_8_2x32_rvv_i32 : 5.7 5.0
> avg_8_2x64_c : 46.7 44.2
> avg_8_2x64_rvv_i32 : 39.2 36.0
> avg_8_2x128_c : 99.7 80.0
> avg_8_2x128_rvv_i32 : 86.2 65.5
> avg_8_4x2_c : 2.0 2.0
> avg_8_4x2_rvv_i32 : 1.0 1.0
> avg_8_4x4_c : 3.5 3.7
> avg_8_4x4_rvv_i32 : 1.5 1.2
> avg_8_4x8_c : 6.5 7.0
> avg_8_4x8_rvv_i32 : 2.0 1.7
> avg_8_4x16_c : 13.5 14.0
> avg_8_4x16_rvv_i32 : 3.2 2.7
> avg_8_4x32_c : 26.2 27.5
> avg_8_4x32_rvv_i32 : 5.7 5.0
> avg_8_4x64_c : 75.0 65.7
> avg_8_4x64_rvv_i32 : 44.0 32.0
> avg_8_4x128_c : 165.2 118.5
> avg_8_4x128_rvv_i32 : 81.5 71.0
> avg_8_8x2_c : 3.2 3.5
> avg_8_8x2_rvv_i32 : 1.2 1.0
> avg_8_8x4_c : 6.5 6.5
> avg_8_8x4_rvv_i32 : 1.5 1.5
> avg_8_8x8_c : 12.5 13.2
> avg_8_8x8_rvv_i32 : 2.2 1.7
> avg_8_8x16_c : 25.2 26.5
> avg_8_8x16_rvv_i32 : 3.7 2.7
> avg_8_8x32_c : 50.0 52.5
> avg_8_8x32_rvv_i32 : 6.7 5.2
> avg_8_8x64_c : 120.7 119.0
> avg_8_8x64_rvv_i32 : 43.2 33.5
> avg_8_8x128_c : 247.5 217.7
> avg_8_8x128_rvv_i32 : 100.5 74.7
> avg_8_16x2_c : 6.2 6.5
> avg_8_16x2_rvv_i32 : 1.2 1.0
> avg_8_16x4_c : 12.2 13.0
> avg_8_16x4_rvv_i32 : 2.0 1.2
> avg_8_16x8_c : 24.5 25.7
> avg_8_16x8_rvv_i32 : 3.2 2.0
> avg_8_16x16_c : 48.7 51.2
> avg_8_16x16_rvv_i32 : 5.7 3.2
> avg_8_16x32_c : 97.5 102.7
> avg_8_16x32_rvv_i32 : 10.7 6.0
> avg_8_16x64_c : 213.0 215.0
> avg_8_16x64_rvv_i32 : 51.5 33.5
> avg_8_16x128_c : 408.5 417.0
> avg_8_16x128_rvv_i32 : 102.0 71.5
> avg_8_32x2_c : 12.2 13.0
> avg_8_32x2_rvv_i32 : 2.0 1.2
> avg_8_32x4_c : 24.5 25.5
> avg_8_32x4_rvv_i32 : 3.2 1.7
> avg_8_32x8_c : 48.5 50.7
> avg_8_32x8_rvv_i32 : 5.7 3.0
> avg_8_32x16_c : 96.5 101.5
> avg_8_32x16_rvv_i32 : 10.5 5.0
> avg_8_32x32_c : 210.2 202.5
> avg_8_32x32_rvv_i32 : 20.2 9.7
> avg_8_32x64_c : 431.7 417.2
> avg_8_32x64_rvv_i32 : 68.0 46.0
> avg_8_32x128_c : 822.2 819.0
> avg_8_32x128_rvv_i32 : 152.2 69.0
> avg_8_64x2_c : 24.0 25.2
> avg_8_64x2_rvv_i32 : 3.0 1.7
> avg_8_64x4_c : 48.2 51.0
> avg_8_64x4_rvv_i32 : 5.5 2.7
> avg_8_64x8_c : 96.7 101.5
> avg_8_64x8_rvv_i32 : 10.0 5.0
> avg_8_64x16_c : 193.5 203.0
> avg_8_64x16_rvv_i32 : 19.2 9.2
> avg_8_64x32_c : 404.2 405.7
> avg_8_64x32_rvv_i32 : 37.7 18.0
> avg_8_64x64_c : 846.2 841.7
> avg_8_64x64_rvv_i32 : 136.5 35.2
> avg_8_64x128_c : 1659.5 1662.2
> avg_8_64x128_rvv_i32 : 236.7 177.7
> avg_8_128x2_c : 48.7 51.0
> avg_8_128x2_rvv_i32 : 5.2 2.7
> avg_8_128x4_c : 96.7 101.0
> avg_8_128x4_rvv_i32 : 9.7 4.7
> avg_8_128x8_c : 226.0 201.5
> avg_8_128x8_rvv_i32 : 18.7 8.7
> avg_8_128x16_c : 402.7 402.7
> avg_8_128x16_rvv_i32 : 37.0 17.2
> avg_8_128x32_c : 791.2 805.0
> avg_8_128x32_rvv_i32 : 73.5 33.5
> avg_8_128x64_c : 1616.7 1645.2
> avg_8_128x64_rvv_i32 : 223.7 68.2
> avg_8_128x128_c : 3202.0 3235.2
> avg_8_128x128_rvv_i32 : 390.0 314.2
> w_avg_8_2x2_c : 1.7 1.5
> w_avg_8_2x2_rvv_i32 : 1.7 1.5
> w_avg_8_2x4_c : 2.7 2.5
> w_avg_8_2x4_rvv_i32 : 2.7 2.5
> w_avg_8_2x8_c : 5.0 5.0
> w_avg_8_2x8_rvv_i32 : 4.5 4.0
> w_avg_8_2x16_c : 26.5 9.5
> w_avg_8_2x16_rvv_i32 : 8.0 7.0
> w_avg_8_2x32_c : 18.7 18.5
> w_avg_8_2x32_rvv_i32 : 15.0 13.2
> w_avg_8_2x64_c : 58.5 46.5
> w_avg_8_2x64_rvv_i32 : 49.7 38.7
> w_avg_8_2x128_c : 121.7 85.2
> w_avg_8_2x128_rvv_i32 : 89.7 81.0
> w_avg_8_4x2_c : 2.5 2.5
> w_avg_8_4x2_rvv_i32 : 1.7 1.5
> w_avg_8_4x4_c : 4.7 4.7
> w_avg_8_4x4_rvv_i32 : 2.7 2.2
> w_avg_8_4x8_c : 9.0 9.0
> w_avg_8_4x8_rvv_i32 : 4.5 4.0
> w_avg_8_4x16_c : 17.7 17.7
> w_avg_8_4x16_rvv_i32 : 8.0 7.0
> w_avg_8_4x32_c : 35.0 35.0
> w_avg_8_4x32_rvv_i32 : 15.0 13.5
> w_avg_8_4x64_c : 95.2 80.2
> w_avg_8_4x64_rvv_i32 : 47.7 38.0
> w_avg_8_4x128_c : 197.7 164.7
> w_avg_8_4x128_rvv_i32 : 101.7 81.5
> w_avg_8_8x2_c : 4.5 4.5
> w_avg_8_8x2_rvv_i32 : 2.0 1.7
> w_avg_8_8x4_c : 8.7 8.7
> w_avg_8_8x4_rvv_i32 : 2.7 2.5
> w_avg_8_8x8_c : 33.5 17.0
> w_avg_8_8x8_rvv_i32 : 4.7 4.0
> w_avg_8_8x16_c : 34.0 34.0
> w_avg_8_8x16_rvv_i32 : 8.5 7.2
> w_avg_8_8x32_c : 85.5 67.7
> w_avg_8_8x32_rvv_i32 : 16.2 13.5
> w_avg_8_8x64_c : 162.5 148.2
> w_avg_8_8x64_rvv_i32 : 50.0 36.5
> w_avg_8_8x128_c : 380.2 301.5
> w_avg_8_8x128_rvv_i32 : 87.2 79.5
> w_avg_8_16x2_c : 8.5 8.7
> w_avg_8_16x2_rvv_i32 : 2.2 1.7
> w_avg_8_16x4_c : 16.7 17.0
> w_avg_8_16x4_rvv_i32 : 3.7 2.5
> w_avg_8_16x8_c : 33.2 33.7
> w_avg_8_16x8_rvv_i32 : 6.5 4.2
> w_avg_8_16x16_c : 66.2 66.5
> w_avg_8_16x16_rvv_i32 : 12.0 7.5
> w_avg_8_16x32_c : 133.2 134.0
> w_avg_8_16x32_rvv_i32 : 23.0 14.2
> w_avg_8_16x64_c : 296.0 276.7
> w_avg_8_16x64_rvv_i32 : 66.7 38.2
> w_avg_8_16x128_c : 625.2 539.7
> w_avg_8_16x128_rvv_i32 : 135.5 79.2
> w_avg_8_32x2_c : 16.7 16.7
> w_avg_8_32x2_rvv_i32 : 3.5 2.0
> w_avg_8_32x4_c : 33.2 33.2
> w_avg_8_32x4_rvv_i32 : 6.0 3.5
> w_avg_8_32x8_c : 65.7 66.2
> w_avg_8_32x8_rvv_i32 : 11.2 5.7
> w_avg_8_32x16_c : 132.0 132.0
> w_avg_8_32x16_rvv_i32 : 21.5 10.7
> w_avg_8_32x32_c : 261.7 272.2
> w_avg_8_32x32_rvv_i32 : 42.2 20.5
> w_avg_8_32x64_c : 528.2 562.7
> w_avg_8_32x64_rvv_i32 : 83.5 59.2
> w_avg_8_32x128_c : 1135.5 1070.0
> w_avg_8_32x128_rvv_i32 : 208.7 96.5
> w_avg_8_64x2_c : 33.0 33.0
> w_avg_8_64x2_rvv_i32 : 6.0 3.0
> w_avg_8_64x4_c : 65.5 67.0
> w_avg_8_64x4_rvv_i32 : 11.0 5.2
> w_avg_8_64x8_c : 150.0 134.7
> w_avg_8_64x8_rvv_i32 : 21.5 10.0
> w_avg_8_64x16_c : 265.2 273.7
> w_avg_8_64x16_rvv_i32 : 42.2 19.0
> w_avg_8_64x32_c : 629.7 541.7
> w_avg_8_64x32_rvv_i32 : 83.7 37.7
> w_avg_8_64x64_c : 1259.0 1237.7
> w_avg_8_64x64_rvv_i32 : 190.7 76.0
> w_avg_8_64x128_c : 2967.0 2209.5
> w_avg_8_64x128_rvv_i32 : 437.0 190.5
> w_avg_8_128x2_c : 65.7 66.0
> w_avg_8_128x2_rvv_i32 : 11.2 5.5
> w_avg_8_128x4_c : 131.7 134.7
> w_avg_8_128x4_rvv_i32 : 21.5 10.0
> w_avg_8_128x8_c : 270.2 264.2
> w_avg_8_128x8_rvv_i32 : 42.2 19.2
> w_avg_8_128x16_c : 580.0 554.2
> w_avg_8_128x16_rvv_i32 : 83.5 37.5
> w_avg_8_128x32_c : 1141.0 1206.2
> w_avg_8_128x32_rvv_i32 : 166.2 74.2
> w_avg_8_128x64_c : 2295.5 2403.5
> w_avg_8_128x64_rvv_i32 : 408.2 159.0
> w_avg_8_128x128_c : 5367.5 4915.2
> w_avg_8_128x128_rvv_i32 : 741.2 331.5
>
> test
>
> u makefile
> ---
> libavcodec/riscv/vvc/Makefile | 2 +
> libavcodec/riscv/vvc/vvc_mc_rvv.S | 295 +++++++++++++++++++++++++++++
> libavcodec/riscv/vvc/vvcdsp_init.c | 71 +++++++
> libavcodec/vvc/dsp.c | 4 +-
> libavcodec/vvc/dsp.h | 1 +
> 5 files changed, 372 insertions(+), 1 deletion(-)
> create mode 100644 libavcodec/riscv/vvc/Makefile
> create mode 100644 libavcodec/riscv/vvc/vvc_mc_rvv.S
> create mode 100644 libavcodec/riscv/vvc/vvcdsp_init.c
>
> diff --git a/libavcodec/riscv/vvc/Makefile b/libavcodec/riscv/vvc/Makefile
> new file mode 100644
> index 0000000000..582b051579
> --- /dev/null
> +++ b/libavcodec/riscv/vvc/Makefile
> @@ -0,0 +1,2 @@
> +OBJS-$(CONFIG_VVC_DECODER) += riscv/vvc/vvcdsp_init.o
> +RVV-OBJS-$(CONFIG_VVC_DECODER) += riscv/vvc/vvc_mc_rvv.o
> diff --git a/libavcodec/riscv/vvc/vvc_mc_rvv.S
> b/libavcodec/riscv/vvc/vvc_mc_rvv.S
> new file mode 100644
> index 0000000000..f2128fa776
> --- /dev/null
> +++ b/libavcodec/riscv/vvc/vvc_mc_rvv.S
> @@ -0,0 +1,295 @@
> +/*
> + * Copyright (c) 2024 Institue of Software Chinese Academy of Sciences
> (ISCAS).
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> + */
> +
> +#include "libavutil/riscv/asm.S"
> +
> +.macro vsetvlstatic8 w, vlen, is_w
> + .if \w <= 2
> + vsetivli zero, \w, e8, mf8, ta, ma
> + .elseif \w <= 4 && \vlen == 128
> + vsetivli zero, \w, e8, mf4, ta, ma
> + .elseif \w <= 4 && \vlen >= 256
> + vsetivli zero, \w, e8, mf8, ta, ma
> + .elseif \w <= 8 && \vlen == 128
> + vsetivli zero, \w, e8, mf2, ta, ma
> + .elseif \w <= 8 && \vlen >= 256
> + vsetivli zero, \w, e8, mf4, ta, ma
> + .elseif \w <= 16 && \vlen == 128
> + vsetivli zero, \w, e8, m1, ta, ma
> + .elseif \w <= 16 && \vlen >= 256
> + vsetivli zero, \w, e8, mf2, ta, ma
> + .elseif \w <= 32 && \vlen >= 256
> + li t0, \w
> + vsetvli zero, t0, e8, m1, ta, ma
> + .elseif \w <= (\vlen / 4) || \is_w
> + li t0, 64
> + vsetvli zero, t0, e8, m2, ta, ma
> + .else
> + li t0, \w
> + vsetvli zero, t0, e8, m4, ta, ma
> + .endif
> +.endm
> +
> +.macro vsetvlstatic16 w, vlen, is_w
> + .if \w <= 2
> + vsetivli zero, \w, e16, mf4, ta, ma
> + .elseif \w <= 4 && \vlen == 128
> + vsetivli zero, \w, e16, mf2, ta, ma
> + .elseif \w <= 4 && \vlen >= 256
> + vsetivli zero, \w, e16, mf4, ta, ma
> + .elseif \w <= 8 && \vlen == 128
> + vsetivli zero, \w, e16, m1, ta, ma
> + .elseif \w <= 8 && \vlen >= 256
> + vsetivli zero, \w, e16, mf2, ta, ma
> + .elseif \w <= 16 && \vlen == 128
> + vsetivli zero, \w, e16, m2, ta, ma
> + .elseif \w <= 16 && \vlen >= 256
> + vsetivli zero, \w, e16, m1, ta, ma
> + .elseif \w <= 32 && \vlen >= 256
> + li t0, \w
> + vsetvli zero, t0, e16, m2, ta, ma
> + .elseif \w <= (\vlen / 4) || \is_w
> + li t0, 64
> + vsetvli zero, t0, e16, m4, ta, ma
> + .else
> + li t0, \w
> + vsetvli zero, t0, e16, m8, ta, ma
> + .endif
> +.endm
> +
> +.macro vsetvlstatic32 w, vlen
> + .if \w <= 2
> + vsetivli zero, \w, e32, mf2, ta, ma
> + .elseif \w <= 4 && \vlen == 128
> + vsetivli zero, \w, e32, m1, ta, ma
> + .elseif \w <= 4 && \vlen >= 256
> + vsetivli zero, \w, e32, mf2, ta, ma
> + .elseif \w <= 8 && \vlen == 128
> + vsetivli zero, \w, e32, m2, ta, ma
> + .elseif \w <= 8 && \vlen >= 256
> + vsetivli zero, \w, e32, m1, ta, ma
> + .elseif \w <= 16 && \vlen == 128
> + vsetivli zero, \w, e32, m4, ta, ma
> + .elseif \w <= 16 && \vlen >= 256
> + vsetivli zero, \w, e32, m2, ta, ma
> + .elseif \w <= 32 && \vlen >= 256
> + li t0, \w
> + vsetvli zero, t0, e32, m4, ta, ma
> + .else
> + li t0, \w
> + vsetvli zero, t0, e32, m8, ta, ma
> + .endif
> +.endm
> +
> +.macro avg_nx1 w, vlen
> + vsetvlstatic16 \w, \vlen, 0
> + vle16.v v0, (a2)
> + vle16.v v8, (a3)
> + vadd.vv v8, v8, v0
> + vmax.vx v8, v8, zero
> + vsetvlstatic8 \w, \vlen, 0
> + vnclipu.wi v8, v8, 7
> + vse8.v v8, (a0)
> +.endm
> +
> +.macro avg w, vlen, id
> +\id\w\vlen:
> +.if \w < 128
> + vsetvlstatic16 \w, \vlen, 0
> + addi t0, a2, 128*2
> + addi t1, a3, 128*2
> + add t2, a0, a1
> + vle16.v v0, (a2)
> + vle16.v v8, (a3)
> + addi a5, a5, -2
> + vle16.v v16, (t0)
> + vle16.v v24, (t1)
> + vadd.vv v8, v8, v0
> + vadd.vv v24, v24, v16
> + vmax.vx v8, v8, zero
> + vmax.vx v24, v24, zero
> + vsetvlstatic8 \w, \vlen, 0
> + addi a2, a2, 128*4
> + vnclipu.wi v8, v8, 7
> + vnclipu.wi v24, v24, 7
> + addi a3, a3, 128*4
> + vse8.v v8, (a0)
> + vse8.v v24, (t2)
> + sh1add a0, a1, a0
> +.else
> + avg_nx1 128, \vlen
> + addi a5, a5, -1
> + .if \vlen == 128
> + addi a2, a2, 64*2
> + addi a3, a3, 64*2
> + addi a0, a0, 64
> + avg_nx1 128, \vlen
> + addi a0, a0, -64
> + addi a2, a2, 128
> + addi a3, a3, 128
> + .else
> + addi a2, a2, 128*2
> + addi a3, a3, 128*2
> + .endif
> + add a0, a0, a1
> +.endif
> + bnez a5, \id\w\vlen\()b
> + ret
> +.endm
> +
> +
> +.macro AVG_JMP_TABLE id, vlen
> +const jmp_table_\id\vlen
> + .8byte \id\()2\vlen\()f
> + .8byte \id\()4\vlen\()f
> + .8byte \id\()8\vlen\()f
> + .8byte \id\()16\vlen\()f
> + .8byte \id\()32\vlen\()f
> + .8byte \id\()64\vlen\()f
> + .8byte \id\()128\vlen\()f
> +endconst
> +.endm
> +
> +.macro AVG_J vlen, id
> + clz a4, a4
> + li t0, __riscv_xlen-2
> + sub a4, t0, a4
> + lla t0, jmp_table_\id\vlen
> + sh3add t0, a4, t0
> + ld t0, 0(t0)
> + jr t0
> +.endm
> +
> +.macro func_avg vlen
> +func ff_vvc_avg_8_rvv_\vlen\(), zve32x
> + AVG_JMP_TABLE 1, \vlen
> + csrw vxrm, zero
> + AVG_J \vlen, 1
> + .irp w,2,4,8,16,32,64,128
> + avg \w, \vlen, 1
> + .endr
> +endfunc
> +.endm
> +
> +.macro w_avg_nx1 w, vlen
> + vsetvlstatic16 \w, \vlen, 1
> + vle16.v v0, (a2)
> + vle16.v v8, (a3)
> + vwmul.vx v16, v0, a7
> + vwmacc.vx v16, t3, v8
> + vsetvlstatic32 \w, \vlen
> + vadd.vx v16, v16, t4
> + vsetvlstatic16 \w, \vlen, 1
> + vnsrl.wx v16, v16, t6
> + vmax.vx v16, v16, zero
> + vsetvlstatic8 \w, \vlen, 1
> + vnclipu.wi v16, v16, 0
> + vse8.v v16, (a0)
> +.endm
> +
> +.macro w_avg w, vlen, id
> +\id\w\vlen:
> +.if \vlen <= 16
> + vsetvlstatic16 \w, \vlen, 1
> + addi t0, a2, 128*2
> + addi t1, a3, 128*2
> + vle16.v v0, (a2)
> + vle16.v v8, (a3)
> + addi a5, a5, -2
> + vle16.v v20, (t0)
> + vle16.v v24, (t1)
> + vwmul.vx v16, v0, a7
> + vwmul.vx v28, v20, a7
> + vwmacc.vx v16, t3, v8
> + vwmacc.vx v28, t3, v24
> + vsetvlstatic32 \w, \vlen
> + add t2, a0, a1
> + vadd.vx v16, v16, t4
> + vadd.vx v28, v28, t4
> + vsetvlstatic16 \w, \vlen, 1
> + vnsrl.wx v16, v16, t6
> + vnsrl.wx v28, v28, t6
> + vmax.vx v16, v16, zero
> + vmax.vx v28, v28, zero
> + vsetvlstatic8 \w, \vlen, 1
> + addi a2, a2, 128*4
> + vnclipu.wi v16, v16, 0
> + vnclipu.wi v28, v28, 0
> + vse8.v v16, (a0)
> + addi a3, a3, 128*4
> + vse8.v v28, (t2)
> + sh1add a0, a1, a0
> +.else
> + w_avg_nx1 \w, \vlen
> + addi a5, a5, -1
> + .if \w == (\vlen / 2)
> + addi a2, a2, (\vlen / 2)
> + addi a3, a3, (\vlen / 2)
> + addi a0, a0, (\vlen / 4)
> + w_avg_nx1 \w, \vlen
> + addi a2, a2, -(\vlen / 2)
> + addi a3, a3, -(\vlen / 2)
> + addi a0, a0, -(\vlen / 4)
> + .elseif \w == 128 && \vlen == 128
> + .rept 3
> + addi a2, a2, (\vlen / 2)
> + addi a3, a3, (\vlen / 2)
> + addi a0, a0, (\vlen / 4)
> + w_avg_nx1 \w, \vlen
> + .endr
> + addi a2, a2, -(\vlen / 2) * 3
> + addi a3, a3, -(\vlen / 2) * 3
> + addi a0, a0, -(\vlen / 4) * 3
> + .endif
> +
> + addi a2, a2, 128*2
> + addi a3, a3, 128*2
> + add a0, a0, a1
> +.endif
> + bnez a5, \id\w\vlen\()b
> + ret
> +.endm
> +
> +
> +.macro func_w_avg vlen
> +func ff_vvc_w_avg_8_rvv_\vlen\(), zve32x
> + AVG_JMP_TABLE 2, \vlen
> + csrw vxrm, zero
> + addi t6, a6, 7
> + ld t3, (sp)
> + ld t4, 8(sp)
> + ld t5, 16(sp)
> + add t4, t4, t5
> + addi t4, t4, 1 // o0 + o1 + 1
> + addi t5, t6, -1 // shift - 1
> + sll t4, t4, t5
> + AVG_J \vlen, 2
> + .irp w,2,4,8,16,32,64,128
> + w_avg \w, \vlen, 2
> + .endr
> +endfunc
> +.endm
> +
> +func_avg 128
> +func_avg 256
> +#if (__riscv_xlen == 64)
> +func_w_avg 128
> +func_w_avg 256
> +#endif
> diff --git a/libavcodec/riscv/vvc/vvcdsp_init.c
> b/libavcodec/riscv/vvc/vvcdsp_init.c
> new file mode 100644
> index 0000000000..85b1ede061
> --- /dev/null
> +++ b/libavcodec/riscv/vvc/vvcdsp_init.c
> @@ -0,0 +1,71 @@
> +/*
> + * Copyright (c) 2024 Institue of Software Chinese Academy of Sciences
> (ISCAS).
> + *
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> + */
> +
> +#include "config.h"
> +
> +#include "libavutil/attributes.h"
> +#include "libavutil/cpu.h"
> +#include "libavutil/riscv/cpu.h"
> +#include "libavcodec/vvc/dsp.h"
> +
> +#define bf(fn, bd, opt) fn##_##bd##_##opt
> +
> +#define AVG_PROTOTYPES(bd, opt)
> \
> +void bf(ff_vvc_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
> \
> + const int16_t *src0, const int16_t *src1, int width, int height);
> \
> +void bf(ff_vvc_w_avg, bd, opt)(uint8_t *dst, ptrdiff_t dst_stride,
> \
> + const int16_t *src0, const int16_t *src1, int width, int height,
> \
> + int denom, int w0, int w1, int o0, int o1);
> +
> +AVG_PROTOTYPES(8, rvv_128)
> +AVG_PROTOTYPES(8, rvv_256)
> +
> +void ff_vvc_dsp_init_riscv(VVCDSPContext *const c, const int bd)
> +{
> +#if HAVE_RVV
> + const int flags = av_get_cpu_flags();
> +
> + if ((flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB_ADDR) &&
> + ff_rv_vlen_least(256)) {
> + switch (bd) {
> + case 8:
> + c->inter.avg = ff_vvc_avg_8_rvv_256;
> +# if (__riscv_xlen == 64)
> + c->inter.w_avg = ff_vvc_w_avg_8_rvv_256;
> +# endif
> + break;
> + default:
> + break;
> + }
> + } else if ((flags & AV_CPU_FLAG_RVV_I32) && (flags &
> AV_CPU_FLAG_RVB_ADDR) &&
> + ff_rv_vlen_least(128)) {
> + switch (bd) {
> + case 8:
> + c->inter.avg = ff_vvc_avg_8_rvv_128;
> +# if (__riscv_xlen == 64)
> + c->inter.w_avg = ff_vvc_w_avg_8_rvv_128;
> +# endif
> + break;
> + default:
> + break;
> + }
> + }
> +#endif
> +}
> diff --git a/libavcodec/vvc/dsp.c b/libavcodec/vvc/dsp.c
> index 41e830a98a..c55a37d255 100644
> --- a/libavcodec/vvc/dsp.c
> +++ b/libavcodec/vvc/dsp.c
> @@ -121,7 +121,9 @@ void ff_vvc_dsp_init(VVCDSPContext *vvcdsp, int
> bit_depth)
> break;
> }
>
> -#if ARCH_X86
> +#if ARCH_RISCV
> + ff_vvc_dsp_init_riscv(vvcdsp, bit_depth);
> +#elif ARCH_X86
> ff_vvc_dsp_init_x86(vvcdsp, bit_depth);
> #endif
> }
> diff --git a/libavcodec/vvc/dsp.h b/libavcodec/vvc/dsp.h
> index 1f14096c41..e03236dd76 100644
> --- a/libavcodec/vvc/dsp.h
> +++ b/libavcodec/vvc/dsp.h
> @@ -180,6 +180,7 @@ typedef struct VVCDSPContext {
>
> void ff_vvc_dsp_init(VVCDSPContext *hpc, int bit_depth);
>
> +void ff_vvc_dsp_init_riscv(VVCDSPContext *hpc, const int bit_depth);
> void ff_vvc_dsp_init_x86(VVCDSPContext *hpc, const int bit_depth);
>
> #endif /* AVCODEC_VVC_DSP_H */
> --
> 2.45.1
>
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