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/*
* 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 ff_read_time(void)
{
#if (__riscv_xlen >= 64)
uintptr_t cycles;
__asm__ volatile ("rdtime %0" : "=r" (cycles));
#else
uint64_t cycles;
uint32_t hi, lo, check;
__asm__ volatile (
"1: rdtimeh %0\n"
" rdtime %1\n"
" rdtimeh %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 ff_read_time
#define FF_TIMER_UNITS "ticks"
#endif
#endif /* AVUTIL_RISCV_TIMER_H */
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