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ca664f2254
In this case, the inner loop computing the scalar product can be reduced to just one multiplication and one sum even with 128-bit vectors. The result is a lot simpler, but also brings more modest performance gains: flac_lpc_16_13_c: 15241.0 flac_lpc_16_13_rvv_i32: 11230.0 flac_lpc_16_16_c: 17884.0 flac_lpc_16_16_rvv_i32: 12125.7 flac_lpc_16_29_c: 27847.7 flac_lpc_16_29_rvv_i32: 10494.0 flac_lpc_16_32_c: 30051.5 flac_lpc_16_32_rvv_i32: 10355.0
125 lines
5.2 KiB
C
125 lines
5.2 KiB
C
/*
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* Copyright © 2023 Rémi Denis-Courmont.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/riscv/cpu.h"
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#include "libavcodec/flacdsp.h"
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void ff_flac_lpc16_rvv(int32_t *decoded, const int coeffs[32],
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int pred_order, int qlevel, int len);
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void ff_flac_lpc32_rvv(int32_t *decoded, const int coeffs[32],
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int pred_order, int qlevel, int len);
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void ff_flac_lpc32_rvv_simple(int32_t *decoded, const int coeffs[32],
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int pred_order, int qlevel, int len);
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void ff_flac_decorrelate_indep2_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep4_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep6_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep8_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_ls_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_rs_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_ms_16_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep2_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep4_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep6_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_indep8_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_ls_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_rs_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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void ff_flac_decorrelate_ms_32_rvv(uint8_t **out, int32_t **in,
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int channels, int len, int shift);
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av_cold void ff_flacdsp_init_riscv(FLACDSPContext *c, enum AVSampleFormat fmt,
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int channels)
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{
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#if HAVE_RVV
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int flags = av_get_cpu_flags();
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if ((flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
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int vlenb = ff_get_rv_vlenb();
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if (vlenb >= 16) {
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c->lpc16 = ff_flac_lpc16_rvv;
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# if (__riscv_xlen >= 64)
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if (vlenb > 16)
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c->lpc32 = ff_flac_lpc32_rvv_simple;
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else
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c->lpc32 = ff_flac_lpc32_rvv;
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}
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switch (fmt) {
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case AV_SAMPLE_FMT_S16:
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switch (channels) {
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case 2:
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c->decorrelate[0] = ff_flac_decorrelate_indep2_16_rvv;
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break;
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case 4:
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c->decorrelate[0] = ff_flac_decorrelate_indep4_16_rvv;
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break;
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case 6:
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c->decorrelate[0] = ff_flac_decorrelate_indep6_16_rvv;
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break;
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case 8:
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c->decorrelate[0] = ff_flac_decorrelate_indep8_16_rvv;
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break;
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}
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c->decorrelate[1] = ff_flac_decorrelate_ls_16_rvv;
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c->decorrelate[2] = ff_flac_decorrelate_rs_16_rvv;
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c->decorrelate[3] = ff_flac_decorrelate_ms_16_rvv;
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break;
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case AV_SAMPLE_FMT_S32:
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switch (channels) {
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case 2:
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c->decorrelate[0] = ff_flac_decorrelate_indep2_32_rvv;
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break;
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case 4:
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c->decorrelate[0] = ff_flac_decorrelate_indep4_32_rvv;
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break;
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case 6:
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c->decorrelate[0] = ff_flac_decorrelate_indep6_32_rvv;
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break;
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case 8:
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c->decorrelate[0] = ff_flac_decorrelate_indep8_32_rvv;
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break;
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}
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c->decorrelate[1] = ff_flac_decorrelate_ls_32_rvv;
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c->decorrelate[2] = ff_flac_decorrelate_rs_32_rvv;
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c->decorrelate[3] = ff_flac_decorrelate_ms_32_rvv;
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break;
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# endif
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}
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}
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#endif
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}
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