1 /* Test file for mpfr_sinh_cosh.
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 "mpfr-test.h"
24
25 static void
failed(mpfr_ptr x,mpfr_ptr esh,mpfr_ptr gsh,mpfr_ptr ech,mpfr_ptr gch)26 failed (mpfr_ptr x, mpfr_ptr esh, mpfr_ptr gsh, mpfr_ptr ech, mpfr_ptr gch)
27 {
28 printf ("error : mpfr_sinh_cosh (x) x = ");
29 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDD);
30 printf ("\nsinh(x) expected ");
31 mpfr_out_str (stdout, 10, 0, esh, MPFR_RNDD);
32 printf ("\n got ");
33 mpfr_out_str (stdout, 10, 0, gsh, MPFR_RNDD);
34 printf ("\ncosh(x) expected ");
35 mpfr_out_str (stdout, 10, 0, ech, MPFR_RNDD);
36 printf ("\n got ");
37 mpfr_out_str (stdout, 10, 0, gch, MPFR_RNDD);
38 putchar ('\n');
39
40 mpfr_clears (x, esh, gsh, ech, gch, (mpfr_ptr) 0);
41 exit (1);
42 }
43
44 /* check against sinh, cosh */
45 static void
check(mpfr_ptr x,mpfr_rnd_t rnd)46 check (mpfr_ptr x, mpfr_rnd_t rnd)
47 {
48 mpfr_t s, c, sx, cx;
49 int isc, is, ic;
50
51 mpfr_inits2 (MPFR_PREC(x), s, c, sx, cx, (mpfr_ptr) 0);
52
53 isc = mpfr_sinh_cosh (sx, cx, x, rnd);
54 is = mpfr_sinh (s, x, rnd);
55 ic = mpfr_cosh (c, x, rnd);
56
57 if (!mpfr_equal_p (s, sx) || !mpfr_equal_p (c, cx))
58 failed (x, s, sx, c, cx);
59 MPFR_ASSERTN (isc = is || ic);
60
61 mpfr_clears (s, c, sx, cx, (mpfr_ptr) 0);
62 }
63
64 static void
check_nans(void)65 check_nans (void)
66 {
67 mpfr_t x, sh, ch;
68
69 mpfr_init2 (x, 123);
70 mpfr_init2 (sh, 123);
71 mpfr_init2 (ch, 123);
72
73 /* nan */
74 mpfr_set_nan (x);
75 mpfr_sinh_cosh (sh, ch, x, MPFR_RNDN);
76 MPFR_ASSERTN (mpfr_nan_p (sh));
77 MPFR_ASSERTN (mpfr_nan_p (ch));
78
79 /* +inf */
80 mpfr_set_inf (x, 1);
81 mpfr_sinh_cosh (sh, ch, x, MPFR_RNDN);
82 MPFR_ASSERTN (mpfr_inf_p (sh));
83 MPFR_ASSERTN (mpfr_sgn (sh) > 0);
84 MPFR_ASSERTN (mpfr_inf_p (ch));
85 MPFR_ASSERTN (mpfr_sgn (ch) > 0);
86
87 /* -inf */
88 mpfr_set_inf (x, -1);
89 mpfr_sinh_cosh (sh, ch, x, MPFR_RNDN);
90 MPFR_ASSERTN (mpfr_inf_p (sh));
91 MPFR_ASSERTN (mpfr_sgn (sh) < 0);
92 MPFR_ASSERTN (mpfr_inf_p (ch));
93 MPFR_ASSERTN (mpfr_sgn (ch) > 0);
94
95 mpfr_clear (x);
96 mpfr_clear (sh);
97 mpfr_clear (ch);
98 }
99
100 int
main(int argc,char * argv[])101 main (int argc, char *argv[])
102 {
103 int i;
104 mpfr_t x;
105
106 tests_start_mpfr ();
107
108 check_nans ();
109
110 /* check against values given by sinh(x), cosh(x) */
111 mpfr_init2 (x, 53);
112 mpfr_set_str (x, "FEDCBA987654321p-48", 16, MPFR_RNDN);
113 for (i = 0; i < 10; ++i)
114 {
115 /* x = i - x / 2 : boggle sign and bits */
116 mpfr_ui_sub (x, i, x, MPFR_RNDD);
117 mpfr_div_2ui (x, x, 2, MPFR_RNDD);
118
119 check (x, MPFR_RNDN);
120 check (x, MPFR_RNDU);
121 check (x, MPFR_RNDD);
122 }
123 mpfr_clear (x);
124
125 tests_end_mpfr ();
126 return 0;
127 }
128