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/* Test mpf_div, mpf_div_2exp, mpf_mul_2exp.
Copyright 1996, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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 GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
#ifndef SIZE
#define SIZE 16
#endif
int
main (int argc, char **argv)
{
int reps = 100000;
int i;
mpf_t u, v, w1, w2, w3;
mp_size_t bprec = 100;
mpf_t rerr, limit_rerr;
mp_size_t un;
mp_exp_t ue;
tests_start ();
if (argc > 1)
{
reps = strtol (argv[1], 0, 0);
if (argc > 2)
bprec = strtol (argv[2], 0, 0);
}
mpf_set_default_prec (bprec);
mpf_init (rerr);
mpf_init (limit_rerr);
mpf_init (u);
mpf_init (v);
mpf_init (w1);
mpf_init (w2);
mpf_init (w3);
for (i = 0; i < reps; i++)
{
unsigned long int res_prec;
unsigned long int pow2;
res_prec = urandom () % (bprec + 100);
mpf_set_prec (w1, res_prec);
mpf_set_prec (w2, res_prec);
mpf_set_prec (w3, res_prec);
mpf_set_ui (limit_rerr, 1);
mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
pow2 = urandom () % 0x10000;
mpf_set_ui (v, 1);
mpf_mul_2exp (v, v, pow2);
un = urandom () % (2 * SIZE) - SIZE;
ue = urandom () % SIZE;
mpf_random2 (u, un, ue);
mpf_div_2exp (w1, u, pow2);
mpf_div (w2, u, v);
mpf_reldiff (rerr, w1, w2);
if (mpf_cmp (rerr, limit_rerr) > 0)
{
printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i);
printf (" u = "); mpf_dump (u);
printf (" v = "); mpf_dump (v);
printf (" w1 = "); mpf_dump (w1);
printf (" w2 = "); mpf_dump (w2);
abort ();
}
mpf_mul_2exp (w3, w1, pow2);
mpf_reldiff (rerr, u, w3);
if (mpf_cmp (rerr, limit_rerr) > 0)
{
printf ("ERROR in mpf_mul_2exp after %d tests\n", i);
printf (" u = "); mpf_dump (u);
printf (" v = "); mpf_dump (v);
printf (" w1 = "); mpf_dump (w1);
printf (" w3 = "); mpf_dump (w3);
abort ();
}
}
mpf_clear (rerr);
mpf_clear (limit_rerr);
mpf_clear (u);
mpf_clear (v);
mpf_clear (w1);
mpf_clear (w2);
mpf_clear (w3);
tests_end ();
exit (0);
}
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