mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-03 10:21:05 +00:00
82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/* High precision, low overhead timing functions. sparc64 version.
|
|
Copyright (C) 2001, 2002, 2003, 2004 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 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#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;
|
|
|
|
#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; \
|
|
GLRO(dl_hp_timing_overhead) = ~0ull; \
|
|
do \
|
|
{ \
|
|
hp_timing_t __t1, __t2; \
|
|
HP_TIMING_NOW (__t1); \
|
|
HP_TIMING_NOW (__t2); \
|
|
if (__t2 - __t1 < GLRO(dl_hp_timing_overhead)) \
|
|
GLRO(dl_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) - GLRO(dl_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", "g6"); \
|
|
} 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 */
|