1 | /* High precision, low overhead timing functions. x86-64 version. |
2 | Copyright (C) 2002-2018 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _HP_TIMING_H |
20 | #define _HP_TIMING_H 1 |
21 | |
22 | /* We always assume having the timestamp register. */ |
23 | #define HP_TIMING_AVAIL (1) |
24 | #define HP_SMALL_TIMING_AVAIL (1) |
25 | |
26 | /* We indeed have inlined functions. */ |
27 | #define HP_TIMING_INLINE (1) |
28 | |
29 | /* We use 64bit values for the times. */ |
30 | typedef unsigned long long int hp_timing_t; |
31 | |
32 | /* The "=A" constraint used in 32-bit mode does not work in 64-bit mode. */ |
33 | #define HP_TIMING_NOW(Var) \ |
34 | ({ unsigned int _hi, _lo; \ |
35 | asm volatile ("rdtsc" : "=a" (_lo), "=d" (_hi)); \ |
36 | (Var) = ((unsigned long long int) _hi << 32) | _lo; }) |
37 | |
38 | #include <hp-timing-common.h> |
39 | |
40 | #endif /* hp-timing.h */ |
41 | |