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/* Test file for mpfr_tanh.
Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Adapted from tarctan.c.
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., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include "mpfr-test.h"
#define TEST_FUNCTION mpfr_tanh
#include "tgeneric.c"
static void
special (void)
{
mpfr_t x;
mpfr_init (x);
mpfr_set_nan (x);
mpfr_tanh (x, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_nan_p (x));
mpfr_set_inf (x, 1);
mpfr_tanh (x, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_cmp_ui (x, 1) == 0);
mpfr_set_inf (x, -1);
mpfr_tanh (x, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_cmp_si (x, -1) == 0);
mpfr_set_prec (x, 10);
mpfr_set_str_binary (x, "-0.1001011001");
mpfr_tanh (x, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_cmp_si_2exp (x, -135, -8) == 0);
mpfr_clear (x);
}
static void
special_overflow (void)
{
mpfr_t x, y;
int i;
mpfr_clear_overflow ();
set_emin (-125);
set_emax (128);
mpfr_init2 (x, 24);
mpfr_init2 (y, 24);
mpfr_set_str_binary (x, "0.101100100000000000110100E7");
i = mpfr_tanh (y, x, GMP_RNDN);
if (mpfr_cmp_ui (y, 1) || i != 1)
{
printf("Overflow error (1). i=%d\ny=", i);
mpfr_dump (y);
exit (1);
}
MPFR_ASSERTN (!mpfr_overflow_p ());
i = mpfr_tanh (y, x, GMP_RNDZ);
if (mpfr_cmp_str (y, "0.111111111111111111111111E0", 2, GMP_RNDN)
|| i != -1)
{
printf("Overflow error (2).i=%d\ny=", i);
mpfr_dump (y);
exit (1);
}
MPFR_ASSERTN (!mpfr_overflow_p ());
set_emin (MPFR_EMIN_MIN);
set_emax (MPFR_EMAX_MAX);
mpfr_set_str_binary (x, "0.1E1000000000");
i = mpfr_tanh (y, x, GMP_RNDN);
if (mpfr_cmp_ui (y, 1) || i != 1)
{
printf("Overflow error (3). i=%d\ny=", i);
mpfr_dump (y);
exit (1);
}
MPFR_ASSERTN (!mpfr_overflow_p ());
mpfr_set_str_binary (x, "-0.1E1000000000");
i = mpfr_tanh (y, x, GMP_RNDU);
if (mpfr_cmp_str (y, "-0.111111111111111111111111E0", 2, GMP_RNDN)
|| i != 1)
{
printf("Overflow error (4). i=%d\ny=", i);
mpfr_dump (y);
exit (1);
}
mpfr_clear (y);
mpfr_clear (x);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
special_overflow ();
special ();
test_generic (2, 100, 100);
tests_end_mpfr ();
return 0;
}
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