1 /* Test file for mpfr_cmp_d.
2
3 Copyright 1999, 2001-2004, 2006-2023 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramba projects, INRIA.
5
6 This file is part of the GNU MPFR Library.
7
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
12
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 #include "mpfr-test.h"
24 #include "ieee_floats.h"
25
26 int
27 main (void)
28 {
29 mpfr_t x;
30 mpfr_exp_t emin;
31
32 tests_start_mpfr ();
33 emin = mpfr_get_emin ();
34
35 mpfr_init2 (x, IEEE_DBL_MANT_DIG);
36
37 mpfr_set_d (x, 2.34763465, MPFR_RNDN);
38 if (mpfr_cmp_d (x, 2.34763465) != 0)
39 {
40 printf ("Error in mpfr_cmp_d 2.34763465 and ");
41 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
42 exit (1);
43 }
44 if (mpfr_cmp_d (x, 2.345) <= 0)
45 {
46 printf ("Error in mpfr_cmp_d 2.345 and ");
47 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
48 exit (1);
49 }
50 if (mpfr_cmp_d (x, 2.4) >= 0)
51 {
52 printf ("Error in mpfr_cmp_d 2.4 and ");
53 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
54 exit (1);
55 }
56
57 mpfr_set_ui (x, 0, MPFR_RNDZ);
58 mpfr_neg (x, x, MPFR_RNDZ);
59 if (mpfr_cmp_d (x, 0.0))
60 {
61 printf ("Error in mpfr_cmp_d 0.0 and ");
62 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
63 exit (1);
64 }
65
66 mpfr_set_ui (x, 0, MPFR_RNDN);
67 mpfr_ui_div (x, 1, x, MPFR_RNDU);
68 if (mpfr_cmp_d (x, 0.0) == 0)
69 {
70 printf ("Error in mpfr_cmp_d (Inf, 0)\n");
71 exit (1);
72 }
73
74 /* Test in reduced exponent range. */
75 set_emin (1);
76 mpfr_set_ui (x, 1, MPFR_RNDN);
77 if (mpfr_cmp_d (x, 0.9) <= 0)
78 {
79 printf ("Error in reduced exponent range.\n");
80 exit (1);
81 }
82 set_emin (emin);
83
84 #if !defined(MPFR_ERRDIVZERO)
85 /* Check NAN */
86 {
87 int c;
88
89 mpfr_clear_flags ();
90 c = mpfr_cmp_d (x, MPFR_DBL_NAN);
91 if (c != 0 || __gmpfr_flags != MPFR_FLAGS_ERANGE)
92 {
93 printf ("ERROR for NAN (1)\n");
94 printf ("Expected 0, got %d\n", c);
95 printf ("Expected flags:");
96 flags_out (MPFR_FLAGS_ERANGE);
97 printf ("Got flags: ");
98 flags_out (__gmpfr_flags);
99 #ifdef MPFR_NANISNAN
100 printf ("The reason is that NAN == NAN. Please look at the configure "
101 "output\nand Section \"In case of problem\" of the INSTALL "
102 "file.\n");
103 #endif
104 exit (1);
105 }
106
107 mpfr_set_nan (x);
108 mpfr_clear_flags ();
109 c = mpfr_cmp_d (x, 2.0);
110 if (c != 0 || __gmpfr_flags != MPFR_FLAGS_ERANGE)
111 {
112 printf ("ERROR for NAN (2)\n");
113 printf ("Expected 0, got %d\n", c);
114 printf ("Expected flags:");
115 flags_out (MPFR_FLAGS_ERANGE);
116 printf ("Got flags: ");
117 flags_out (__gmpfr_flags);
118 #ifdef MPFR_NANISNAN
119 printf ("The reason is that NAN == NAN. Please look at the configure "
120 "output\nand Section \"In case of problem\" of the INSTALL "
121 "file.\n");
122 #endif
123 exit (1);
124 }
125 }
126 #endif /* MPFR_ERRDIVZERO */
127
128 mpfr_clear (x);
129
130 tests_end_mpfr ();
131 return 0;
132 }