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/* tpow_ui -- test file for mpc_pow_ui.
Copyright (C) 2009, 2010 INRIA
This file is part of GNU MPC.
GNU MPC 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 3 of the License, or (at your
option) any later version.
GNU MPC 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 this program. If not, see http://www.gnu.org/licenses/ .
*/
#include <limits.h> /* for CHAR_BIT */
#include "mpc-tests.h"
static void
compare_mpc_pow (mpfr_prec_t pmax, int iter, unsigned long nbits)
{
mpfr_prec_t p;
mpc_t x, y, z, t;
unsigned long n;
int i, inex_pow, inex_pow_ui;
mpc_rnd_t rnd;
mpc_init3 (y, sizeof (unsigned long) * CHAR_BIT, MPFR_PREC_MIN);
for (p = MPFR_PREC_MIN; p <= pmax; p++)
for (i = 0; i < iter; i++)
{
mpc_init2 (x, p);
mpc_init2 (z, p);
mpc_init2 (t, p);
mpc_urandom (x, rands);
n = gmp_urandomb_ui (rands, nbits); /* 0 <= n < 2^nbits */
mpc_set_ui (y, n, MPC_RNDNN);
for (rnd = 0; rnd < 16; rnd ++)
{
inex_pow = mpc_pow (z, x, y, rnd);
inex_pow_ui = mpc_pow_ui (t, x, n, rnd);
if (mpc_cmp (z, t) != 0)
{
printf ("mpc_pow and mpc_pow_ui differ for x=");
mpc_out_str (stdout, 10, 0, x, MPC_RNDNN);
printf (" n=%lu\n", n);
printf ("mpc_pow gives ");
mpc_out_str (stdout, 10, 0, z, MPC_RNDNN);
printf ("\nmpc_pow_ui gives ");
mpc_out_str (stdout, 10, 0, t, MPC_RNDNN);
printf ("\n");
exit (1);
}
if (inex_pow != inex_pow_ui)
{
printf ("mpc_pow and mpc_pow_ui give different flags for x=");
mpc_out_str (stdout, 10, 0, x, MPC_RNDNN);
printf (" n=%lu\n", n);
printf ("mpc_pow gives %d\n", inex_pow);
printf ("mpc_pow_ui gives %d\n", inex_pow_ui);
exit (1);
}
}
mpc_clear (x);
mpc_clear (z);
mpc_clear (t);
}
mpc_clear (y);
}
int
main (int argc, char *argv[])
{
mpc_t z;
DECL_FUNC (CCU, f, mpc_pow_ui);
if (argc != 1)
{
mpfr_prec_t p;
long int n, k;
mpc_t res;
if (argc != 3 && argc != 4)
{
printf ("Usage: tpow_ui precision exponent [k]\n");
exit (1);
}
p = atoi (argv[1]);
n = atoi (argv[2]);
MPC_ASSERT (n >= 0);
k = (argc > 3) ? atoi (argv[3]) : 1;
MPC_ASSERT (k >= 0);
mpc_init2 (z, p);
mpc_init2 (res, p);
mpfr_const_pi (mpc_realref (z), GMP_RNDN);
mpfr_div_2exp (mpc_realref (z), mpc_realref (z), 2, GMP_RNDN);
mpfr_const_log2 (mpc_imagref (z), GMP_RNDN);
while (k--)
mpc_pow_ui (res, z, (unsigned long int) n, MPC_RNDNN);
mpc_clear (z);
mpc_clear (res);
return 0;
}
test_start ();
data_check (f, "pow_ui.dat");
compare_mpc_pow (100, 5, 19);
test_end ();
return 0;
}
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