1/* Test file for mpfr_log2.
2
3Copyright 2001, 2002, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4Contributed by the AriC and Caramel 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_log2
29#define TEST_RANDOM_POS 8
30#include "tgeneric.c"
31
32static void
33special (void)
34{
35  mpfr_t x;
36  int inex;
37
38  mpfr_init (x);
39
40  mpfr_set_nan (x);
41  inex = mpfr_log2 (x, x, MPFR_RNDN);
42  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
43
44  mpfr_set_inf (x, -1);
45  inex = mpfr_log2 (x, x, MPFR_RNDN);
46  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
47
48  mpfr_set_inf (x, 1);
49  inex = mpfr_log2 (x, x, MPFR_RNDN);
50  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0);
51
52  mpfr_set_ui (x, 0, MPFR_RNDN);
53  inex = mpfr_log2 (x, x, MPFR_RNDN);
54  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
55  mpfr_set_ui (x, 0, MPFR_RNDN);
56  mpfr_neg (x, x, MPFR_RNDN);
57  inex = mpfr_log2 (x, x, MPFR_RNDN);
58  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
59
60  mpfr_set_si (x, -1, MPFR_RNDN);
61  inex = mpfr_log2 (x, x, MPFR_RNDN);
62  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
63
64  mpfr_set_si (x, 1, MPFR_RNDN);
65  inex = mpfr_log2 (x, x, MPFR_RNDN);
66  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x) && inex == 0);
67
68  mpfr_clear (x);
69}
70
71int
72main (int argc, char *argv[])
73{
74  tests_start_mpfr ();
75
76  special ();
77
78  test_generic (2, 100, 30);
79
80  data_check ("data/log2", mpfr_log2, "mpfr_log2");
81
82  tests_end_mpfr ();
83  return 0;
84}
85