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43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* High precision, low overhead timing functions. s390 version.
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Copyright (C) 2019-2020 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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<https://www.gnu.org/licenses/>. */
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#ifndef _HP_TIMING_S390_H
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#define _HP_TIMING_S390_H 1
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/* The stckf instruction is available starting with z9-109 zarch CPUs.
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As there is no extra configure check for z9-109, the z10 one is used. */
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#ifdef HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT
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# include <hp-timing-common.h>
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/* We use 64 bit values for the times.
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Note: Bit 51 is incremented every 0.000 001s = 1us. */
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typedef unsigned long long int hp_timing_t;
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# define HP_TIMING_INLINE (1)
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# define HP_TIMING_NOW(VAR) \
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do { \
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__asm__ __volatile__ ("stckf %0" : "=Q" (VAR) : : "cc"); \
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} while (0)
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#else
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# include_next <hp-timing.h>
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#endif
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#endif /* hp-timing.h */
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