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/* Copyright (C) 2015-2022 Free Software Foundation, Inc.
Contributed by Mentor Embedded.
This file is part of the GNU Offloading and Multi Processing Library
(libgomp).
Libgomp is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This file implements timer routines for AMD GCN. */
#include "libgomp.h"
/* According to AMD:
dGPU RTC is 27MHz
AGPU RTC is 100MHz
FIXME: DTRT on an APU. */
#define RTC_TICKS (1.0 / 27000000.0) /* 27MHz */
double
omp_get_wtime (void)
{
uint64_t clock;
asm ("s_memrealtime %0\n\t"
"s_waitcnt 0" : "=r" (clock));
return clock * RTC_TICKS;
}
double
omp_get_wtick (void)
{
return RTC_TICKS;
}
ialias (omp_get_wtime)
ialias (omp_get_wtick)
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