mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
/* High precision, low overhead timing functions. x86-64 version.
|
|
Copyright (C) 2002 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _HP_TIMING_H
|
|
|
|
/* We can use some of the i686 implementation without changes. */
|
|
# include <sysdeps/i386/i686/hp-timing.h>
|
|
|
|
/* The "=A" constraint used in 32-bit mode does not work in 64-bit mode. */
|
|
# undef HP_TIMING_NOW
|
|
# define HP_TIMING_NOW(Var) \
|
|
({ unsigned int _hi, _lo; asm ("rdtsc" : "=a" (_lo), "=d" (_hi)); \
|
|
(Var) = ((unsigned long long int) _hi << 32) | _lo; })
|
|
|
|
/* The funny business for 32-bit mode is not required here. */
|
|
# undef HP_TIMING_ACCUM
|
|
# define HP_TIMING_ACCUM(Sum, Diff) ((Sum) += (Diff))
|
|
|
|
|
|
#endif /* hp-timing.h */
|