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.
54 lines
1.4 KiB
54 lines
1.4 KiB
2 years ago
|
/*
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVUTIL_RISCV_TIMER_H
|
||
|
|
#define AVUTIL_RISCV_TIMER_H
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
#if HAVE_INLINE_ASM
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
static inline uint64_t rdcycle64(void)
|
||
|
|
{
|
||
|
|
#if (__riscv_xlen >= 64)
|
||
|
|
uintptr_t cycles;
|
||
|
|
|
||
|
|
__asm__ volatile ("rdcycle %0" : "=r"(cycles));
|
||
|
|
|
||
|
|
#else
|
||
|
|
uint64_t cycles;
|
||
|
|
uint32_t hi, lo, check;
|
||
|
|
|
||
|
|
__asm__ volatile (
|
||
|
|
"1: rdcycleh %0\n"
|
||
|
|
" rdcycle %1\n"
|
||
|
|
" rdcycleh %2\n"
|
||
|
|
" bne %0, %2, 1b\n" : "=r" (hi), "=r" (lo), "=r" (check));
|
||
|
|
|
||
|
|
cycles = (((uint64_t)hi) << 32) | lo;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
return cycles;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define AV_READ_TIME rdcycle64
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#endif /* AVUTIL_RISCV_TIMER_H */
|