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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 */ |