1/* Test file for mpfr_tanh.
2
3Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4Contributed by the Arenaire and Cacao projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include <stdio.h>
24#include <stdlib.h>
25
26#include "mpfr-test.h"
27
28#define TEST_FUNCTION mpfr_tanh
29#define TEST_RANDOM_EMIN -36
30#define TEST_RANDOM_EMAX 36
31#include "tgeneric.c"
32
33static void
34special (void)
35{
36  mpfr_t x;
37
38  mpfr_init (x);
39
40  mpfr_set_nan (x);
41  mpfr_tanh (x, x, MPFR_RNDN);
42  MPFR_ASSERTN(mpfr_nan_p (x));
43
44  mpfr_set_inf (x, 1);
45  mpfr_tanh (x, x, MPFR_RNDN);
46  MPFR_ASSERTN(mpfr_cmp_ui (x, 1) == 0);
47
48  mpfr_set_inf (x, -1);
49  mpfr_tanh (x, x, MPFR_RNDN);
50  MPFR_ASSERTN(mpfr_cmp_si (x, -1) == 0);
51
52  mpfr_set_prec (x, 10);
53  mpfr_set_str_binary (x, "-0.1001011001");
54  mpfr_tanh (x, x, MPFR_RNDN);
55  MPFR_ASSERTN(mpfr_cmp_si_2exp (x, -135, -8) == 0);
56
57  mpfr_clear (x);
58}
59
60static void
61special_overflow (void)
62{
63  mpfr_t x, y;
64  int i;
65  mpfr_exp_t emin, emax;
66
67  emin = mpfr_get_emin ();
68  emax = mpfr_get_emax ();
69
70  mpfr_clear_overflow ();
71  set_emin (-125);
72  set_emax (128);
73  mpfr_init2 (x, 24);
74  mpfr_init2 (y, 24);
75
76  mpfr_set_str_binary (x, "0.101100100000000000110100E7");
77  i = mpfr_tanh (y, x, MPFR_RNDN);
78  if (mpfr_cmp_ui (y, 1) || i != 1)
79    {
80      printf("Overflow error (1). i=%d\ny=", i);
81      mpfr_dump (y);
82      exit (1);
83    }
84  MPFR_ASSERTN (!mpfr_overflow_p ());
85
86  i = mpfr_tanh (y, x, MPFR_RNDZ);
87  if (mpfr_cmp_str (y, "0.111111111111111111111111E0", 2, MPFR_RNDN)
88      || i != -1)
89    {
90      printf("Overflow error (2).i=%d\ny=", i);
91      mpfr_dump (y);
92      exit (1);
93    }
94  MPFR_ASSERTN (!mpfr_overflow_p ());
95
96  set_emin (emin);
97  set_emax (emax);
98
99  mpfr_set_str_binary (x, "0.1E1000000000");
100  i = mpfr_tanh (y, x, MPFR_RNDN);
101  if (mpfr_cmp_ui (y, 1) || i != 1)
102    {
103      printf("Overflow error (3). i=%d\ny=", i);
104      mpfr_dump (y);
105      exit (1);
106    }
107  MPFR_ASSERTN (!mpfr_overflow_p ());
108  mpfr_set_str_binary (x, "-0.1E1000000000");
109  i = mpfr_tanh (y, x, MPFR_RNDU);
110  if (mpfr_cmp_str (y, "-0.111111111111111111111111E0", 2, MPFR_RNDN)
111      || i != 1)
112    {
113      printf("Overflow error (4). i=%d\ny=", i);
114      mpfr_dump (y);
115      exit (1);
116    }
117
118  mpfr_clear (y);
119  mpfr_clear (x);
120}
121
122int
123main (int argc, char *argv[])
124{
125  tests_start_mpfr ();
126
127  special_overflow ();
128  special ();
129
130  test_generic (2, 100, 100);
131
132  data_check ("data/tanh", mpfr_tanh, "mpfr_tanh");
133  bad_cases (mpfr_tanh, mpfr_atanh, "mpfr_tanh", 256, -128, 0,
134             4, 128, 800, 100);
135
136  tests_end_mpfr ();
137  return 0;
138}
139