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/* High precision, low overhead timing functions. sparcv9 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 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, %L0\n\t" \
"srlx %L0, 32, %H0" \
: "=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; \
__asm__ __volatile__("srl %L0, 0, %%g1\n\t" \
"sllx %H0, 32, %%g7\n\t" \
"or %%g1, %%g7, %%g1\n\t" \
"1: ldx [%1], %%g5\n\t" \
"add %%g5, %%g1, %%g7\n\t" \
"casx [%1], %%g5, %%g7\n\t" \
"cmp %%g5, %%g7\n\t" \
"bne,pn %%xcc, 1b\n\t" \
" nop" \
: /* no outputs */ \
: "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 */
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