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lavc/ac3dsp: R-V V float_to_fixed24

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c910
    float_to_fixed24_c: 2207.2
    float_to_fixed24_rvv_f32: 696.2

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
This commit is contained in:
sunyuechi 2023-11-22 14:57:29 +08:00 committed by Rémi Denis-Courmont
parent ebfd3912e9
commit 8bdb663062
3 changed files with 44 additions and 0 deletions
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1
libavcodec/riscv/Makefile
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@ -2,6 +2,7 @@ OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_init.o riscv/sbrdsp_init.o
RVV-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_rvv.o riscv/sbrdsp_rvv.o
OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_init.o \
riscv/ac3dsp_rvb.o
RVV-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvv.o
OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_init.o
RVV-OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_rvv.o
OBJS-$(CONFIG_AUDIODSP) += riscv/audiodsp_init.o \

4
libavcodec/riscv/ac3dsp_init.c
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@ -18,6 +18,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stddef.h>
#include <stdint.h>
#include "config.h"
@ -26,6 +27,7 @@
#include "libavcodec/ac3dsp.h"
void ff_extract_exponents_rvb(uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_float_to_fixed24_rvv(int32_t *dst, const float *src, size_t len);
av_cold void ff_ac3dsp_init_riscv(AC3DSPContext *c)
{
@ -34,5 +36,7 @@ av_cold void ff_ac3dsp_init_riscv(AC3DSPContext *c)
if (flags & AV_CPU_FLAG_RVB_ADDR) {
if (flags & AV_CPU_FLAG_RVB_BASIC)
c->extract_exponents = ff_extract_exponents_rvb;
if (flags & AV_CPU_FLAG_RVV_F32)
c->float_to_fixed24 = ff_float_to_fixed24_rvv;
}
}

39
libavcodec/riscv/ac3dsp_rvv.S Normal file
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@ -0,0 +1,39 @@
/*
* Copyright (c) 2023 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/riscv/asm.S"
func ff_float_to_fixed24_rvv, zve32f
li t1, 1 << 24
fcvt.s.w f0, t1
1:
vsetvli t0, a2, e32, m8, ta, ma
sub a2, a2, t0
vle32.v v0, (a1)
vfmul.vf v0, v0, f0
vfcvt.x.f.v v0, v0
sh2add a1, t0, a1
vse32.v v0, (a0)
sh2add a0, t0, a0
bnez a2, 1b
ret
endfunc