1/* ty1 -- test file for the Bessel function of second kind (order 1)
2
3Copyright 2007-2023 Free Software Foundation, Inc.
4Contributed by the AriC and Caramba 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
20https://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 "mpfr-test.h"
24
25#define TEST_FUNCTION mpfr_y1
26#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 8, RANDS)
27#define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */
28#include "tgeneric.c"
29
30int
31main (int argc, char *argv[])
32{
33  mpfr_t x, y;
34
35  tests_start_mpfr ();
36
37  mpfr_init (x);
38  mpfr_init (y);
39
40  /* special values */
41  mpfr_set_nan (x);
42  mpfr_y1 (y, x, MPFR_RNDN);
43  MPFR_ASSERTN(mpfr_nan_p (y));
44
45  mpfr_set_inf (x, 1); /* +Inf */
46  mpfr_y1 (y, x, MPFR_RNDN);
47  MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y));
48
49  mpfr_set_inf (x, -1); /* -Inf */
50  mpfr_y1 (y, x, MPFR_RNDN);
51  MPFR_ASSERTN(mpfr_nan_p (y));
52
53  mpfr_set_ui (x, 0, MPFR_RNDN); /* +0 */
54  mpfr_y1 (y, x, MPFR_RNDN);
55  MPFR_ASSERTN(mpfr_inf_p (y) && MPFR_IS_NEG (y)); /* y1(+0)=-Inf */
56
57  mpfr_set_ui (x, 0, MPFR_RNDN);
58  mpfr_neg (x, x, MPFR_RNDN); /* -0 */
59  mpfr_y1 (y, x, MPFR_RNDN);
60  MPFR_ASSERTN(mpfr_inf_p (y) && MPFR_IS_NEG (y)); /* y1(-0)=-Inf */
61
62  mpfr_set_prec (x, 53);
63  mpfr_set_prec (y, 53);
64
65  mpfr_set_ui (x, 1, MPFR_RNDN);
66  mpfr_y1 (y, x, MPFR_RNDN);
67  mpfr_set_str_binary (x, "-0.110001111111110110010000001111101011001101011100101");
68  if (mpfr_cmp (x, y))
69    {
70      printf ("Error in mpfr_y1 for x=1, rnd=MPFR_RNDN\n");
71      printf ("Expected "); mpfr_dump (x);
72      printf ("Got      "); mpfr_dump (y);
73      exit (1);
74    }
75
76  mpfr_set_si (x, -1, MPFR_RNDN);
77  mpfr_y1 (y, x, MPFR_RNDN);
78  if (!mpfr_nan_p (y))
79    {
80      printf ("Error in mpfr_y1 for x=-1, rnd=MPFR_RNDN\n");
81      printf ("Expected NaN\n");
82      printf ("Got      "); mpfr_dump (y);
83      exit (1);
84    }
85
86  mpfr_clear (x);
87  mpfr_clear (y);
88
89  test_generic (MPFR_PREC_MIN, 100, 1);
90
91  data_check ("data/y1", mpfr_y1, "mpfr_y1");
92
93  tests_end_mpfr ();
94
95  return 0;
96}
97