110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
|
/* divide.c -- benchmark plain integer division.
|
||
|
|
|
||
|
|
Copyright 2003 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file is part of MPIRbench.
|
||
|
|
|
||
|
|
MPIRbench is free software; you can redistribute it and/or modify it under the
|
||
|
|
terms of the GNU 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 MPIRbench 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License along with
|
||
|
|
the MPIRbench; see the file COPYING. If not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "mpir.h"
|
||
|
|
#include "timing.h"
|
||
|
|
|
||
|
|
int cputime (void);
|
||
|
|
|
||
|
|
int
|
||
|
|
main (int argc, char *argv[])
|
||
|
|
{
|
||
|
|
gmp_randstate_t rs;
|
||
|
|
mpz_t x, y, z;
|
||
|
|
unsigned long int m, n, i, niter, t0, ti;
|
||
|
|
double t, f, ops_per_sec;
|
||
|
|
int decimals;
|
||
|
|
|
||
|
|
if (argc != 3)
|
||
|
|
{
|
||
|
|
fprintf (stderr, "usage: %s m n\n", argv[0]);
|
||
|
|
fprintf (stderr, " where m is number of dividend bits\n");
|
||
|
|
fprintf (stderr, " and n is number of divisor bits\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
m = atoi (argv[1]);
|
||
|
|
n = atoi (argv[2]);
|
||
|
|
|
||
|
|
gmp_randinit_default (rs);
|
||
|
|
|
||
|
|
mpz_init (x);
|
||
|
|
mpz_init (y);
|
||
|
|
mpz_init (z);
|
||
|
|
mpz_urandomb (x, rs, m);
|
||
|
|
mpz_urandomb (y, rs, n);
|
||
|
|
|
||
|
|
printf ("Calibrating CPU speed..."); fflush (stdout);
|
||
|
|
TIME (t, mpz_tdiv_q (z, x, y));
|
||
|
|
printf ("done\n");
|
||
|
|
|
||
|
|
niter = 1 + (unsigned long) (1e4 / t);
|
||
|
|
printf ("Dividing an %lu-bit number by an %lu-bit number %lu times...",
|
||
|
|
m, n, niter);
|
||
|
|
fflush (stdout);
|
||
|
|
t0 = cputime ();
|
||
|
|
for (i = niter; i > 0; i--)
|
||
|
|
{
|
||
|
|
mpz_tdiv_q (z, x, y);
|
||
|
|
}
|
||
|
|
ti = cputime () - t0;
|
||
|
|
printf ("done!\n");
|
||
|
|
|
||
|
|
ops_per_sec = 1000.0 * niter / ti;
|
||
|
|
f = 100.0;
|
||
|
|
for (decimals = 0;; decimals++)
|
||
|
|
{
|
||
|
|
if (ops_per_sec > f)
|
||
|
|
break;
|
||
|
|
f = f * 0.1;
|
||
|
|
}
|
||
|
|
|
||
|
|
printf ("RESULT: %.*f operations per second\n", decimals, ops_per_sec);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return user CPU time measured in milliseconds. */
|
||
|
|
#if !defined (__sun) \
|
||
|
|
&& (defined (USG) || defined (__SVR4) || defined (_UNICOS) \
|
||
|
|
|| defined (__hpux))
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
cputime ()
|
||
|
|
{
|
||
|
|
return (int) ((double) clock () * 1000 / CLOCKS_PER_SEC);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
#include <sys/resource.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
cputime ()
|
||
|
|
{
|
||
|
|
struct rusage rus;
|
||
|
|
|
||
|
|
getrusage (0, &rus);
|
||
|
|
return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
|
||
|
|
}
|
||
|
|
#endif
|