1 /* Test file for mpfr_cmp_ld.
2
3 Copyright 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 <float.h>
24
25 #include "mpfr-test.h"
26 #include "ieee_floats.h"
27
28 int
main(void)29 main (void)
30 {
31 mpfr_t x;
32 mpfr_exp_t emin;
33
34 tests_start_mpfr ();
35 emin = mpfr_get_emin ();
36
37 mpfr_init2(x, MPFR_LDBL_MANT_DIG);
38
39 mpfr_set_ld (x, 2.34763465L, MPFR_RNDN);
40 if (mpfr_cmp_ld (x, 2.34763465L) != 0)
41 {
42 printf ("Error in mpfr_cmp_ld 2.34763465 and ");
43 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
44 exit (1);
45 }
46 if (mpfr_cmp_ld (x, 2.345L) <= 0)
47 {
48 printf ("Error in mpfr_cmp_ld 2.345 and ");
49 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
50 exit (1);
51 }
52 if (mpfr_cmp_ld (x, 2.4L) >= 0)
53 {
54 printf ("Error in mpfr_cmp_ld 2.4 and ");
55 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
56 exit (1);
57 }
58
59 mpfr_set_ui (x, 0, MPFR_RNDZ);
60 mpfr_neg (x, x, MPFR_RNDZ);
61 if (mpfr_cmp_ld (x, 0.0))
62 {
63 printf ("Error in mpfr_cmp_ld 0.0 and ");
64 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); putchar('\n');
65 exit (1);
66 }
67
68 mpfr_set_ui (x, 0, MPFR_RNDN);
69 mpfr_ui_div (x, 1, x, MPFR_RNDU);
70 if (mpfr_cmp_ld (x, 0.0) == 0)
71 {
72 printf ("Error in mpfr_cmp_ld (Inf, 0)\n");
73 exit (1);
74 }
75
76 /* Test in reduced exponent range. */
77 set_emin (1);
78 mpfr_set_ui (x, 1, MPFR_RNDN);
79 if (mpfr_cmp_ld (x, 0.9) <= 0)
80 {
81 printf ("Error in reduced exponent range.\n");
82 exit (1);
83 }
84 set_emin (emin);
85
86 #if !defined(MPFR_ERRDIVZERO)
87 /* Check NAN */
88 {
89 int c;
90
91 mpfr_clear_flags ();
92 c = mpfr_cmp_ld (x, MPFR_DBL_NAN);
93 if (c != 0 || __gmpfr_flags != MPFR_FLAGS_ERANGE)
94 {
95 printf ("ERROR for NAN (1)\n");
96 printf ("Expected 0, got %d\n", c);
97 printf ("Expected flags:");
98 flags_out (MPFR_FLAGS_ERANGE);
99 printf ("Got flags: ");
100 flags_out (__gmpfr_flags);
101 #ifdef MPFR_NANISNAN
102 printf ("The reason is that NAN == NAN. Please look at the configure "
103 "output\nand Section \"In case of problem\" of the INSTALL "
104 "file.\n");
105 #endif
106 exit (1);
107 }
108
109 mpfr_set_nan (x);
110 mpfr_clear_flags ();
111 c = mpfr_cmp_ld (x, 2.0);
112 if (c != 0 || __gmpfr_flags != MPFR_FLAGS_ERANGE)
113 {
114 printf ("ERROR for NAN (2)\n");
115 printf ("Expected 0, got %d\n", c);
116 printf ("Expected flags:");
117 flags_out (MPFR_FLAGS_ERANGE);
118 printf ("Got flags: ");
119 flags_out (__gmpfr_flags);
120 #ifdef MPFR_NANISNAN
121 printf ("The reason is that NAN == NAN. Please look at the configure "
122 "output\nand Section \"In case of problem\" of the INSTALL "
123 "file.\n");
124 #endif
125 exit (1);
126 }
127 }
128 #endif /* MPFR_ERRDIVZERO */
129
130 mpfr_clear (x);
131
132 tests_end_mpfr ();
133 return 0;
134 }
135
136
137