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/* Test file for mpfr_cbrt.
Copyright 2002, 2003 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The MPFR 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 MPFR 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 MPFR 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. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "mpfr.h"
int
main (void)
{
mpfr_t x;
mp_rnd_t r;
mp_prec_t p;
tests_start_mpfr ();
mpfr_init (x);
mpfr_set_prec (x, 53);
mpfr_set_d (x, 8.39005285514734966412e-01, GMP_RNDN);
mpfr_cbrt (x, x, GMP_RNDN);
if (mpfr_get_d1 (x) != 9.43166207799662426048e-01)
{
fprintf (stderr, "Error (1)\n");
exit (1);
}
for (p=2; p<100; p++)
{
mpfr_set_prec (x, p);
for (r=0; r<4; r++)
{
mpfr_set_ui (x, 1, GMP_RNDN);
mpfr_cbrt (x, x, r);
if (mpfr_cmp_ui (x, 1))
{
fprintf (stderr, "Error in mpfr_cbrt for x=1, rnd=%s\ngot ",
mpfr_print_rnd_mode (r));
mpfr_out_str (stderr, 2, 0, x, GMP_RNDN);
fprintf (stderr, "\n");
exit (1);
}
mpfr_set_si (x, -1, GMP_RNDN);
mpfr_cbrt (x, x, r);
if (mpfr_cmp_si (x, -1))
{
fprintf (stderr, "Error in mpfr_cbrt for x=-1, rnd=%s\ngot ",
mpfr_print_rnd_mode (r));
mpfr_out_str (stderr, 2, 0, x, GMP_RNDN);
fprintf (stderr, "\n");
exit (1);
}
if (p >= 5)
{
int i;
for (i = -12; i <= 12; i++)
{
mpfr_set_d (x, 27.0, GMP_RNDN);
mpfr_mul_2si (x, x, 3*i, GMP_RNDN);
mpfr_cbrt (x, x, GMP_RNDN);
if (mpfr_cmp_si_2exp (x, 3, i))
{
fprintf (stderr, "Error in mpfr_cbrt for "
"x = 27.0 * 2^(%d), rnd=%s\ngot ",
3*i, mpfr_print_rnd_mode (r));
mpfr_out_str (stderr, 2, 0, x, GMP_RNDN);
fprintf (stderr, "\ninstead of 3 * 2^(%d)\n", i);
exit (1);
}
}
}
}
}
mpfr_clear (x);
tests_end_mpfr ();
return 0;
}
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