1 /* Test file for mpfr_add_d
2
3 Copyright 2007-2023 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
27 static void
28 check_regulars (void)
29 {
30 mpfr_t x, y, z;
31 double d;
32 int inexact;
33
34 /* (1) check with enough precision */
35 mpfr_init2 (x, IEEE_DBL_MANT_DIG);
36 mpfr_init2 (y, IEEE_DBL_MANT_DIG);
37 mpfr_init2 (z, IEEE_DBL_MANT_DIG);
38
39 mpfr_set_str (y, "4096", 10, MPFR_RNDN);
40 d = 0.125;
41 mpfr_clear_flags ();
42 inexact = mpfr_add_d (x, y, d, MPFR_RNDN);
43 if (inexact != 0)
44 {
45 printf ("Inexact flag error in mpfr_add_d (1)\n");
46 exit (1);
47 }
48 mpfr_set_str (z, "4096.125", 10, MPFR_RNDN);
49 if (mpfr_cmp (z, x))
50 {
51 printf ("Error in mpfr_add_d (");
52 mpfr_out_str (stdout, 10, 7, y, MPFR_RNDN);
53 printf (" + %.20g)\nexpected ", d);
54 mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
55 printf ("\ngot ");
56 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
57 printf ("\n");
58 exit (1);
59 }
60
61 /* (2) check inexact flag */
62 mpfr_set_prec (x, 2);
63 mpfr_set_prec (z, 2);
64
65 mpfr_clear_flags ();
66 inexact = mpfr_add_d (x, y, d, MPFR_RNDN);
67 if (inexact == 0)
68 {
69 printf ("Inexact flag error in mpfr_add_d (2)\n");
70 exit (1);
71 }
72 mpfr_set_str (z, "4096.125", 10, MPFR_RNDN);
73 if (mpfr_cmp (z, x))
74 {
75 printf ("Error in mpfr_add_d (");
76 mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN);
77 printf (" + %.20g)\nexpected ", d);
78 mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
79 printf ("\ngot ");
80 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
81 printf ("\n");
82 exit (1);
83 }
84
85 mpfr_clears (x, y, z, (mpfr_ptr) 0);
86 }
87
88 static void
89 check_nans (void)
90 {
91 #if !defined(MPFR_ERRDIVZERO)
92 mpfr_t x, y;
93 int inexact;
94
95 mpfr_init2 (x, 123);
96 mpfr_init2 (y, 123);
97
98 /* nan + 1.0 is nan */
99 mpfr_set_nan (x);
100 mpfr_clear_flags ();
101 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
102 MPFR_ASSERTN (inexact == 0);
103 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
104 MPFR_ASSERTN (mpfr_nan_p (y));
105
106 /* +inf + 1.0 == +inf */
107 mpfr_set_inf (x, 1);
108 mpfr_clear_flags ();
109 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
110 MPFR_ASSERTN (inexact == 0);
111 MPFR_ASSERTN (__gmpfr_flags == 0);
112 MPFR_ASSERTN (mpfr_inf_p (y));
113 MPFR_ASSERTN (MPFR_IS_POS (y));
114
115 /* -inf + 1.0 == -inf */
116 mpfr_set_inf (x, -1);
117 mpfr_clear_flags ();
118 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN);
119 MPFR_ASSERTN (inexact == 0);
120 MPFR_ASSERTN (__gmpfr_flags == 0);
121 MPFR_ASSERTN (mpfr_inf_p (y));
122 MPFR_ASSERTN (MPFR_IS_NEG (y));
123
124 mpfr_clear (x);
125 mpfr_clear (y);
126 #endif
127 }
128
129 #define TEST_FUNCTION mpfr_add_d
130 #define DOUBLE_ARG2
131 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
132 #include "tgeneric.c"
133
134 int
135 main (void)
136 {
137 tests_start_mpfr ();
138
139 check_nans ();
140 check_regulars ();
141
142 test_generic (MPFR_PREC_MIN, 1000, 100);
143
144 tests_end_mpfr ();
145 return 0;
146 }