1 /* Copyright (C) 2015-2020 Free Software Foundation, Inc.
2 Contributed by Mentor Embedded.
3
4 This file is part of the GNU Offloading and Multi Processing Library
5 (libgomp).
6
7 Libgomp is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 more details.
16
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
20
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
25
26 /* This file implements timer routines for AMD GCN. */
27
28 #include "libgomp.h"
29
30 /* According to AMD:
31 dGPU RTC is 27MHz
32 AGPU RTC is 100MHz
33 FIXME: DTRT on an APU. */
34 #define RTC_TICKS (1.0 / 27000000.0) /* 27MHz */
35
36 double
omp_get_wtime(void)37 omp_get_wtime (void)
38 {
39 uint64_t clock;
40 asm ("s_memrealtime %0\n\t"
41 "s_waitcnt 0" : "=r" (clock));
42 return clock * RTC_TICKS;
43 }
44
45 double
omp_get_wtick(void)46 omp_get_wtick (void)
47 {
48 return RTC_TICKS;
49 }
50
51 ialias (omp_get_wtime)
52 ialias (omp_get_wtick)
53