43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
|
/* High precision, low overhead timing functions.
|
||
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library 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
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#ifndef _HP_TIMING_H
|
||
|
|
#define _HP_TIMING_H 1
|
||
|
|
|
||
|
|
/* We always assume having the timestamp register. */
|
||
|
|
#define HP_TIMING_AVAIL (1)
|
||
|
|
#define HP_SMALL_TIMING_AVAIL (1)
|
||
|
|
|
||
|
|
/* We indeed have inlined functions. */
|
||
|
|
#define HP_TIMING_INLINE (1)
|
||
|
|
|
||
|
|
/* We use 64bit values for the times. */
|
||
|
|
typedef unsigned long long int hp_timing_t;
|
||
|
|
|
||
|
|
/* Read the stable counter. */
|
||
|
|
#define HP_TIMING_NOW(Var) \
|
||
|
|
({ \
|
||
|
|
unsigned long long int _count; \
|
||
|
|
asm volatile ("rdtime.d\t%0,$r0" : "=r" (_count)); \
|
||
|
|
(Var) = _count; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#include <hp-timing-common.h>
|
||
|
|
|
||
|
|
#endif /* hp-timing.h */
|