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/* High precision, low overhead timing functions. Alpha version.
Copyright (C) 2001-2024 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
<https://www.gnu.org/licenses/>. */
#ifndef _HP_TIMING_ALPHA_H
#define _HP_TIMING_ALPHA_H 1
#if IS_IN(rtld)
/* 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_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>
#else
# include <sysdeps/generic/hp-timing.h>
#endif /* IS_IN(rtld) */
#endif /* hp-timing.h */
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