1/* Test file for mpfr_add_d
2
3Copyright 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#include <float.h>
26
27#include "mpfr-test.h"
28
29#if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0)
30
31static void
32check_regulars (void)
33{
34  mpfr_t x, y, z;
35  double d;
36  int inexact;
37
38  /* (1) check with enough precision */
39  mpfr_init2 (x, IEEE_DBL_MANT_DIG);
40  mpfr_init2 (y, IEEE_DBL_MANT_DIG);
41  mpfr_init2 (z, IEEE_DBL_MANT_DIG);
42
43  mpfr_set_str (y, "4096", 10, MPFR_RNDN);
44  d = 0.125;
45  mpfr_clear_flags ();
46  inexact = mpfr_add_d (x, y, d, MPFR_RNDN);
47  if (inexact != 0)
48    {
49      printf ("Inexact flag error in mpfr_add_d (1)\n");
50      exit (1);
51    }
52  mpfr_set_str (z, "4096.125", 10, MPFR_RNDN);
53  if (mpfr_cmp (z, x))
54    {
55      printf ("Error in mpfr_add_d (");
56      mpfr_out_str (stdout, 10, 7, y, MPFR_RNDN);
57      printf (" + %.20g)\nexpected ", d);
58      mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
59      printf ("\ngot     ");
60      mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
61      printf ("\n");
62      exit (1);
63    }
64
65  /* (2) check inexact flag */
66  mpfr_set_prec (x, 2);
67  mpfr_set_prec (z, 2);
68
69  mpfr_clear_flags ();
70  inexact = mpfr_add_d (x, y, d, MPFR_RNDN);
71  if (inexact == 0)
72    {
73      printf ("Inexact flag error in mpfr_add_d (2)\n");
74      exit (1);
75    }
76  mpfr_set_str (z, "4096.125", 10, MPFR_RNDN);
77  if (mpfr_cmp (z, x))
78    {
79      printf ("Error in mpfr_add_d (");
80      mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN);
81      printf (" + %.20g)\nexpected ", d);
82      mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
83      printf ("\ngot     ");
84      mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
85      printf ("\n");
86      exit (1);
87    }
88
89  mpfr_clears (x, y, z, (mpfr_ptr) 0);
90}
91
92static void
93check_nans (void)
94{
95  mpfr_t  x, y;
96  int inexact;
97
98  mpfr_init2 (x, 123);
99  mpfr_init2 (y, 123);
100
101  /* nan + 1.0 is nan */
102  mpfr_set_nan (x);
103  mpfr_clear_flags ();
104  inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
105  MPFR_ASSERTN (inexact == 0);
106  MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0);
107  MPFR_ASSERTN (mpfr_nan_p (y));
108
109  /* +inf + 1.0 == +inf */
110  mpfr_set_inf (x, 1);
111  mpfr_clear_flags ();
112  inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
113  MPFR_ASSERTN (inexact == 0);
114  MPFR_ASSERTN (__gmpfr_flags == 0);
115  MPFR_ASSERTN (mpfr_inf_p (y));
116  MPFR_ASSERTN (MPFR_IS_POS (y));
117
118  /* -inf + 1.0 == -inf */
119  mpfr_set_inf (x, -1);
120  mpfr_clear_flags ();
121  inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
122  MPFR_ASSERTN (inexact == 0);
123  MPFR_ASSERTN (__gmpfr_flags == 0);
124  MPFR_ASSERTN (mpfr_inf_p (y));
125  MPFR_ASSERTN (MPFR_IS_NEG (y));
126
127  mpfr_clear (x);
128  mpfr_clear (y);
129}
130
131#define TEST_FUNCTION mpfr_add_d
132#define DOUBLE_ARG2
133#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
134#include "tgeneric.c"
135
136int
137main (void)
138{
139  tests_start_mpfr ();
140
141  check_nans ();
142  check_regulars ();
143
144  test_generic (2, 1000, 100);
145
146  tests_end_mpfr ();
147  return 0;
148}
149
150#else
151
152int
153main (void)
154{
155  printf ("Warning! Test disabled for this MPFR version.\n");
156  return 0;
157}
158
159#endif
160