mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.7 KiB
69 lines
1.7 KiB
/* |
|
* 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; |
|
}
|
|
|