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

/* High precision, low overhead timing functions.  Alpha version.
   Copyright (C) 2001-2015 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson <rth@redhat.com>, 2001.

   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
   <http://www.gnu.org/licenses/>.  */

#ifndef _HP_TIMING_H
#define _HP_TIMING_H	1

/* We always have the timestamp register, but it's got only a 4 second
   range.  Use it for ld.so profiling only.  */
#define HP_TIMING_AVAIL		(0)
#define HP_SMALL_TIMING_AVAIL	(1)

/* We indeed have inlined functions.  */
#define HP_TIMING_INLINE	(1)

/* We use 32 bit values for the times.  */
typedef unsigned int hp_timing_t;

/* The "rpcc" instruction returns a 32-bit counting half and a 32-bit
   "virtual cycle counter displacement".  Subtracting the two gives us
   a virtual cycle count.  */
#define HP_TIMING_NOW(VAR) \
  do {									      \
    unsigned long int x_;						      \
    asm volatile ("rpcc %0" : "=r"(x_));				      \
    (VAR) = (int) (x_) - (int) (x_ >> 32);				      \
  } while (0)

#include <hp-timing-common.h>

#endif	/* hp-timing.h */
Commit	Line	Data
9f888890	1	/* High precision, low overhead timing functions. Alpha version.
b168057a	2	Copyright (C) 2001-2015 Free Software Foundation, Inc.
9f888890 UD	3	This file is part of the GNU C Library.
	4	Contributed by Richard Henderson <rth@redhat.com>, 2001.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
ab84e3ff PE	17	License along with the GNU C Library. If not, see
ab84e3ff PE	18	<http://www.gnu.org/licenses/>. */
9f888890 UD	19
	20	#ifndef _HP_TIMING_H
	21	#define _HP_TIMING_H 1
	22
9f888890 UD	23	/* We always have the timestamp register, but it's got only a 4 second
	24	range. Use it for ld.so profiling only. */
	25	#define HP_TIMING_AVAIL (0)
	26	#define HP_SMALL_TIMING_AVAIL (1)
	27
	28	/* We indeed have inlined functions. */
	29	#define HP_TIMING_INLINE (1)
	30
	31	/* We use 32 bit values for the times. */
	32	typedef unsigned int hp_timing_t;
	33
9f888890 UD	34	/* The "rpcc" instruction returns a 32-bit counting half and a 32-bit
	35	"virtual cycle counter displacement". Subtracting the two gives us
	36	a virtual cycle count. */
	37	#define HP_TIMING_NOW(VAR) \
	38	do { \
	39	unsigned long int x_; \
	40	asm volatile ("rpcc %0" : "=r"(x_)); \
	41	(VAR) = (int) (x_) - (int) (x_ >> 32); \
	42	} while (0)
	43
86e1a7ff	44	#include <hp-timing-common.h>
9f888890 UD	45
9f888890 UD	46	#endif /* hp-timing.h */