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/*
* Copyright (c) 2021 Loongson Technology Corporation Limited
* Contributed by Xiwei Gu <guxiwei-hf@loongson.cn>
*
* 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 "libavcodec/videodsp.h"
#include "libavutil/attributes.h"
static void prefetch_loongarch(uint8_t *mem, ptrdiff_t stride, int h)
{
register const uint8_t *p = mem;
__asm__ volatile (
"1: \n\t"
"preld 0, %[p], 0 \n\t"
"preld 0, %[p], 32 \n\t"
"addi.d %[h], %[h], -1 \n\t"
"add.d %[p], %[p], %[stride] \n\t"
"blt $r0, %[h], 1b \n\t"
: [p] "+r" (p), [h] "+r" (h)
: [stride] "r" (stride)
);
}
av_cold void ff_videodsp_init_loongarch(VideoDSPContext *ctx, int bpc)
{
ctx->prefetch = prefetch_loongarch;
}
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