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262168b04e
There are currently no ways to run-time detect the CPU capability, so we take it for granted (in the worst case, it will execute NOPs).
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/*
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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 "libavcodec/videodsp.h"
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void ff_prefetch_rv_zicbop(const uint8_t *mem, ptrdiff_t stride, int h);
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av_cold void ff_videodsp_init_riscv(VideoDSPContext *ctx, int bpc)
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{
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#if HAVE_RV_ZICBOP
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/* TODO: Since we pay for the indirect function call anyway, we should
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* only set this if Cache-Block Operation Prefetch (Zicbop) is actually
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* supported and otherwise save a few cycles of NOPs.
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* But so far there are no means to detect Zicbop (in user mode).
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*/
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ctx->prefetch = ff_prefetch_rv_zicbop;
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#endif
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}
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