85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
|
/* High precision, low overhead timing functions. sparc64 version.
|
||
|
|
Copyright (C) 2001 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by David S. Miller <davem@redhat.com>, 2001.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#ifndef _HP_TIMING_H
|
||
|
|
#define _HP_TIMING_H 1
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <stdio-common/_itoa.h>
|
||
|
|
|
||
|
|
#define HP_TIMING_AVAIL (1)
|
||
|
|
#define HP_TIMING_INLINE (1)
|
||
|
|
|
||
|
|
typedef unsigned long int hp_timing_t;
|
||
|
|
|
||
|
|
extern hp_timing_t __libc_hp_timing_overhead;
|
||
|
|
|
||
|
|
#define HP_TIMING_ZERO(Var) (Var) = (0)
|
||
|
|
|
||
|
|
#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rd %%tick, %0" : "=r" (Var))
|
||
|
|
|
||
|
|
#define HP_TIMING_DIFF_INIT() \
|
||
|
|
do { \
|
||
|
|
int __cnt = 5; \
|
||
|
|
__libc_hp_timing_overhead = ~0ull; \
|
||
|
|
do \
|
||
|
|
{ \
|
||
|
|
hp_timing_t __t1, __t2; \
|
||
|
|
HP_TIMING_NOW (__t1); \
|
||
|
|
HP_TIMING_NOW (__t2); \
|
||
|
|
if (__t2 - __t1 < __libc_hp_timing_overhead) \
|
||
|
|
__libc_hp_timing_overhead = __t2 - __t1; \
|
||
|
|
} \
|
||
|
|
while (--__cnt > 0); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start))
|
||
|
|
|
||
|
|
#define HP_TIMING_ACCUM(Sum, Diff) \
|
||
|
|
do { \
|
||
|
|
hp_timing_t __diff = (Diff) - __libc_hp_timing_overhead; \
|
||
|
|
hp_timing_t tmp1, tmp2; \
|
||
|
|
__asm__ __volatile__("1: ldx [%3], %0\n\t" \
|
||
|
|
"add %0, %2, %1\n\t" \
|
||
|
|
"casx [%3], %0, %1\n\t" \
|
||
|
|
"cmp %0, %1\n\t" \
|
||
|
|
"bne,pn %%xcc, 1b\n\t" \
|
||
|
|
" nop" \
|
||
|
|
: "=&r" (tmp1), "=&r" (tmp2) \
|
||
|
|
: "r" (__diff), "r" (&(Sum)) \
|
||
|
|
: "memory", "g1", "g5", "g7"); \
|
||
|
|
} while(0)
|
||
|
|
|
||
|
|
#define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff)
|
||
|
|
|
||
|
|
#define HP_TIMING_PRINT(Buf, Len, Val) \
|
||
|
|
do { \
|
||
|
|
char __buf[20]; \
|
||
|
|
char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0); \
|
||
|
|
int __len = (Len); \
|
||
|
|
char *__dest = (Buf); \
|
||
|
|
while (__len-- > 0 && __cp < __buf + sizeof (__buf)) \
|
||
|
|
*__dest++ = *__cp++; \
|
||
|
|
memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles"))); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#endif /* hp-timing.h */
|