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/*
* Copyright (c) 2020 Loongson Technology Corporation Limited
* Contributed by Shiyou Yin <yinshiyou-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 <stdint.h>
#include "cpu.h"
#define LOONGARCH_CFG2 0x2
#define LOONGARCH_CFG2_LSX (1 << 6)
#define LOONGARCH_CFG2_LASX (1 << 7)
static int cpu_flags_cpucfg(void)
{
int flags = 0;
uint32_t cfg2 = 0;
__asm__ volatile(
"cpucfg %0, %1 \n\t"
: "+&r"(cfg2)
: "r"(LOONGARCH_CFG2)
);
if (cfg2 & LOONGARCH_CFG2_LSX)
flags |= AV_CPU_FLAG_LSX;
if (cfg2 & LOONGARCH_CFG2_LASX)
flags |= AV_CPU_FLAG_LASX;
return flags;
}
int ff_get_cpu_flags_loongarch(void)
{
#if defined __linux__
return cpu_flags_cpucfg();
#else
/* Assume no SIMD ASE supported */
return 0;
#endif
}
size_t ff_get_cpu_max_align_loongarch(void)
{
int flags = av_get_cpu_flags();
if (flags & AV_CPU_FLAG_LASX)
return 32;
if (flags & AV_CPU_FLAG_LSX)
return 16;
return 8;
}
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