mirror of https://git.ffmpeg.org/ffmpeg.git
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
|
|
* 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;
|
|
}
|