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* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/* High precision, low overhead timing functions. x86-64 version.
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Copyright (C) 2002-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _HP_TIMING_H
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#define _HP_TIMING_H 1
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/* We always assume having the timestamp register. */
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#define HP_TIMING_AVAIL (1)
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#define HP_SMALL_TIMING_AVAIL (1)
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/* We indeed have inlined functions. */
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#define HP_TIMING_INLINE (1)
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/* We use 64bit values for the times. */
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typedef unsigned long long int hp_timing_t;
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/* The "=A" constraint used in 32-bit mode does not work in 64-bit mode. */
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#define HP_TIMING_NOW(Var) \
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({ unsigned int _hi, _lo; \
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asm volatile ("rdtsc" : "=a" (_lo), "=d" (_hi)); \
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(Var) = ((unsigned long long int) _hi << 32) | _lo; })
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#include <hp-timing-common.h>
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#endif /* hp-timing.h */
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