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lavc/bswapdsp: RISC-V V bswap_buf

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Rémi Denis-Courmont 2022-10-02 14:55:00 +03:00 committed by Lynne
parent f0ef11ea83
commit d7528af4df
3 changed files with 52 additions and 1 deletions
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1
libavcodec/riscv/Makefile
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@ -7,6 +7,7 @@ OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_init.o \
RVV-OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_rvv.o
OBJS-$(CONFIG_BSWAPDSP) += riscv/bswapdsp_init.o \
riscv/bswapdsp_rvb.o
RVV-OBJS-$(CONFIG_BSWAPDSP) += riscv/bswapdsp_rvv.o
OBJS-$(CONFIG_FMTCONVERT) += riscv/fmtconvert_init.o
RVV-OBJS-$(CONFIG_FMTCONVERT) += riscv/fmtconvert_rvv.o
OBJS-$(CONFIG_IDCTDSP) += riscv/idctdsp_init.o

7
libavcodec/riscv/bswapdsp_init.c
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@ -26,13 +26,18 @@
#include "libavcodec/bswapdsp.h"
void ff_bswap32_buf_rvb(uint32_t *dst, const uint32_t *src, int len);
void ff_bswap32_buf_rvv(uint32_t *dst, const uint32_t *src, int len);
av_cold void ff_bswapdsp_init_riscv(BswapDSPContext *c)
{
#if (__riscv_xlen >= 64)
int cpu_flags = av_get_cpu_flags();
#if (__riscv_xlen >= 64)
if (cpu_flags & AV_CPU_FLAG_RVB_BASIC)
c->bswap_buf = ff_bswap32_buf_rvb;
#endif
#if HAVE_RVV
if (cpu_flags & AV_CPU_FLAG_RVV_I32)
c->bswap_buf = ff_bswap32_buf_rvv;
#endif
}

45
libavcodec/riscv/bswapdsp_rvv.S Normal file
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@ -0,0 +1,45 @@
/*
* Copyright © 2022 Rémi Denis-Courmont.
*
* 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/riscv/asm.S"
func ff_bswap32_buf_rvv, zve32x
li t4, 4
addi t1, a0, 1
addi t2, a0, 2
addi t3, a0, 3
1:
vsetvli t0, a2, e8, m1, ta, ma
vlseg4e8.v v8, (a1)
sub a2, a2, t0
sh2add a1, t0, a1
vsse8.v v8, (t3), t4
sh2add t3, t0, t3
vsse8.v v9, (t2), t4
sh2add t2, t0, t2
vsse8.v v10, (t1), t4
sh2add t1, t0, t1
vsse8.v v11, (a0), t4
sh2add a0, t0, a0
bnez a2, 1b
ret
endfunc