| /* High precision, low overhead timing functions. x86-64 version. |
| Copyright (C) 2002-2014 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #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 volatile ("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) \ |
| do { \ |
| hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead); \ |
| __asm__ __volatile__ ("lock; addq %1, %0" \ |
| : "=m" (Sum) : "r" (__diff), "m" (Sum)); \ |
| } while (0) |
| |
| #endif /* hp-timing.h */ |
