/*
* *****************************************************************
* * *
* * Copyright 2003 HP Partner Technology Access Center - MA *
* * *
* * The software contained on this media is proprietary to *
* * and embodies the confidential technology of *
* * Hewlett-Packard Corporation. Possession, use, duplication *
* * or dissemination of the software and media is authorized *
* * only pursuant to a valid written license from *
* * Hewlett-Packard Corporation. *
* * *
* * Hewlett-Packard Corporation makes no representations about *
* * the suitability of the software described herein for any *
* * purpose. It is provided "as is" without express or implied *
* * warranty. *
* * *
* * RESTRICTED RIGHTS LEGEND Use, duplication, or disclosure *
* * by the U.S. Government is subject to restrictions as set *
* * forth in Subparagraph (c)(1)(ii) of DFARS 252.227-7013, *
* * or in FAR 52.227-19, as applicable. *
* * *
* *****************************************************************
*/
/*
*
* The TICKS macro can be used to access the high-resolution counters
* on the CPU for timing. These counters increment at a rate based on
* the CPU cycle clock. This does not imply a 1:1 ratio.
*
* Use caution, particularly when using these macros, as
* there is no consideration to overflow or changing CPUs. The counters
* in multi-CPU systems are not required to be in sync and may be
* significantly different.
*
* Use these timers only for VERY small windows, 1-2 milliseconds
* to reduce the risk of these problems. These counters return 64-bit
* integer values and should not be stored in int type variables,
* whenever possible the C99 uint64_t type should be used.
*
*/
#ifndef __TICKS_H_
#define __TICKS_H
#include <inttypes.h>
/* Check for HP Tru64 UNIX compilers */
#if defined(__DECC_VER) || defined(__DECCXX_VER)
/*
* Handle the Alpha Processor Family
*/
#if defined(__alpha)
#include <alpha/builtins.h>
#define __TICKS __RPCC()
#endif /* __alpha */
/* Check for the HP-UX Compilers */
#elif defined(__HP_aCC) || defined(__HP_cc)
#if defined (__STDC_32_MODE__)
#error "Must use +e or -Ae for 64-bit integer support"
#endif /* __STDC_32_MODE__ */
/*
* Handle the Intel Itanium Processor Family
*/
#if defined(__ia64)
#include <machine/sys/inline.h>
#define __TICKS _Asm_mov_from_ar(_AREG_ITC)
/*
* Handle the PA-RISC Processor Family
*/
#elif defined(__hppa)
#if defined (__HP_aCC)
#error "Inline assembler not supported in C++, compile using ANSI C"
#endif /* __HP_aCC */
#include <machine/inline.h>
#include <machine/reg.h>
#ifdef __cplusplus
inline
#else /* __cplusplus */
#pragma INLINE __TICKS_f
#endif /* __cplusplus */
static uint64_t __TICKS_f(void) {
register uint64_t _ticks;
_MFCTL(CR16,_ticks);
return _ticks;
}
#define __TICKS __TICKS_f()
#else
#error "Unknown chip for compiler."
#endif /* arch && ( __HP_aCC || __HP_cc ) */
/*
* Check for GCC
*/
#elif defined(__GNUC__)
#ifdef __cplusplus
inline
#endif /* __cplusplus */
static uint64_t __TICKS_f(void) {
register uint64_t _ticks;
#if defined(__alpha) || defined(__alpha__)
/*
* Handle the Alpha Processor Family
*/
asm volatile ("rpcc %0" : "=r"(_ticks));
#elif defined(__ia64) || defined(__ia64__)
/*
* Handle the Intel Itanium Processor Family
*/
asm volatile ("mov %0 = ar.itc ": "=r" (_ticks) );
#elif defined(__hppa) || defined(__hppa__)
/*
* Handle the PA-RISC Processor Family
*/
asm volatile ("mfctl %%cr16, %0" : "=r" (_ticks) : "0" (_ticks));
#else
#error "Unknown Architecture"
#endif /* GCC arch test */
return _ticks;
}
#define __TICKS __TICKS_f()
#else
#error "Unknown Compiler"
#endif /* Complier Tests */
#endif /* __TICKS_H */
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