| 1 | /* |
| 2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_X86_TIMER_H |
| 22 | #define AVUTIL_X86_TIMER_H |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | #if HAVE_INLINE_ASM |
| 27 | |
| 28 | #define FF_TIMER_UNITS "decicycles" |
| 29 | #define AV_READ_TIME read_time |
| 30 | |
| 31 | static inline uint64_t read_time(void) |
| 32 | { |
| 33 | uint32_t a, d; |
| 34 | __asm__ volatile("rdtsc" : "=a" (a), "=d" (d)); |
| 35 | return ((uint64_t)d << 32) + a; |
| 36 | } |
| 37 | |
| 38 | #elif HAVE_RDTSC |
| 39 | |
| 40 | #include <intrin.h> |
| 41 | #define AV_READ_TIME __rdtsc |
| 42 | |
| 43 | #endif /* HAVE_INLINE_ASM */ |
| 44 | |
| 45 | #endif /* AVUTIL_X86_TIMER_H */ |