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54 lines
1.4 KiB
54 lines
1.4 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_RISCV_TIMER_H |
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#define AVUTIL_RISCV_TIMER_H |
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#include "config.h" |
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#if HAVE_INLINE_ASM |
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#include <stdint.h> |
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static inline uint64_t ff_read_time(void) |
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{ |
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#if (__riscv_xlen >= 64) |
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uintptr_t cycles; |
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__asm__ volatile ("rdtime %0" : "=r" (cycles)); |
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#else |
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uint64_t cycles; |
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uint32_t hi, lo, check; |
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__asm__ volatile ( |
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"1: rdtimeh %0\n" |
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" rdtime %1\n" |
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" rdtimeh %2\n" |
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" bne %0, %2, 1b\n" : "=r" (hi), "=r" (lo), "=r" (check)); |
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cycles = (((uint64_t)hi) << 32) | lo; |
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#endif |
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return cycles; |
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} |
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#define AV_READ_TIME ff_read_time |
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#define FF_TIMER_UNITS "ticks" |
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#endif |
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#endif /* AVUTIL_RISCV_TIMER_H */
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