| /* |
| * 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 */ |