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lavu/floatdsp: RISC-V V vector_fmul_scalar

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This is based on existing code from the VLC git tree with two minor
changes to account for the different function prototypes.
This commit is contained in:
Rémi Denis-Courmont 2022-09-26 17:52:28 +03:00 committed by Lynne
parent 39357cad37
commit a6c10d05fe
5 changed files with 84 additions and 1 deletions
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2
libavutil/float_dsp.c
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@ -156,6 +156,8 @@ av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int bit_exact)
ff_float_dsp_init_arm(fdsp);
#elif ARCH_PPC
ff_float_dsp_init_ppc(fdsp, bit_exact);
#elif ARCH_RISCV
ff_float_dsp_init_riscv(fdsp);
#elif ARCH_X86
ff_float_dsp_init_x86(fdsp);
#elif ARCH_MIPS

1
libavutil/float_dsp.h
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@ -205,6 +205,7 @@ float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len);
void ff_float_dsp_init_aarch64(AVFloatDSPContext *fdsp);
void ff_float_dsp_init_arm(AVFloatDSPContext *fdsp);
void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict);
void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp);
void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp);
void ff_float_dsp_init_mips(AVFloatDSPContext *fdsp);

4
libavutil/riscv/Makefile
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@ -1 +1,3 @@
OBJS += riscv/cpu.o
OBJS += riscv/float_dsp_init.o \
riscv/cpu.o
RVV-OBJS += riscv/float_dsp_rvv.o

39
libavutil/riscv/float_dsp_init.c Normal file
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@ -0,0 +1,39 @@
/*
* 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 <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/float_dsp.h"
void ff_vector_fmul_scalar_rvv(float *dst, const float *src, float mul,
int len);
av_cold void ff_float_dsp_init_riscv(AVFloatDSPContext *fdsp)
{
#if HAVE_RVV
int flags = av_get_cpu_flags();
if (flags & AV_CPU_FLAG_RVV_F32)
fdsp->vector_fmul_scalar = ff_vector_fmul_scalar_rvv;
#endif
}

39
libavutil/riscv/float_dsp_rvv.S Normal file
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@ -0,0 +1,39 @@
/*
* 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 "asm.S"
// (a0) = (a1) * fa0 [0..a2-1]
func ff_vector_fmul_scalar_rvv, zve32f
NOHWF fmv.w.x fa0, a2
NOHWF mv a2, a3
1:
vsetvli t0, a2, e32, m1, ta, ma
vle32.v v16, (a1)
sub a2, a2, t0
vfmul.vf v16, v16, fa0
sh2add a1, t0, a1
vse32.v v16, (a0)
sh2add a0, t0, a0
bnez a2, 1b
ret
endfunc