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.
53 lines
1.4 KiB
53 lines
1.4 KiB
/* |
|
* 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 */
|
|
|