/* 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 () %
0 x10000;
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 );
}
Messung V0.5 in Prozent C=96 H=100 G=97
¤ Dauer der Verarbeitung: 0.21 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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