[thirdparty/glibc.git] / sysdeps / loongarch / hp-timing.h

/* High precision, low overhead timing functions.
   Copyright (C) 2022-2024 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 */
Commit	Line	Data
45955fe6	1	/* High precision, low overhead timing functions.
dff8da6b	2	Copyright (C) 2022-2024 Free Software Foundation, Inc.
45955fe6	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	<https://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	/* Read the stable counter. */
	33	#define HP_TIMING_NOW(Var) \
	34	({ \
	35	unsigned long long int _count; \
	36	asm volatile ("rdtime.d\t%0,$r0" : "=r" (_count)); \
	37	(Var) = _count; \
	38	})
	39
	40	#include <hp-timing-common.h>
	41
	42	#endif /* hp-timing.h */