1/* tj1 -- test file for the Bessel function of first kind (order 1)
2
3Copyright 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4Contributed by the Arenaire and Cacao 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
20http://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 <stdio.h>
24#include <stdlib.h>
25
26#include "mpfr-test.h"
27
28#define TEST_FUNCTION mpfr_j1
29#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 8, RANDS)
30#define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */
31#include "tgeneric.c"
32
33int
34main (int argc, char *argv[])
35{
36  mpfr_t x, y;
37
38  tests_start_mpfr ();
39
40  mpfr_init (x);
41  mpfr_init (y);
42
43  /* special values */
44  mpfr_set_nan (x);
45  mpfr_j1 (y, x, MPFR_RNDN);
46  MPFR_ASSERTN(mpfr_nan_p (y));
47
48  mpfr_set_inf (x, 1); /* +Inf */
49  mpfr_j1 (y, x, MPFR_RNDN);
50  MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y));
51
52  mpfr_set_inf (x, -1); /* -Inf */
53  mpfr_j1 (y, x, MPFR_RNDN);
54  MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y));
55
56  mpfr_set_ui (x, 0, MPFR_RNDN); /* +0 */
57  mpfr_j1 (y, x, MPFR_RNDN);
58  MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y)); /* j1(+0)=+0 */
59
60  mpfr_set_ui (x, 0, MPFR_RNDN);
61  mpfr_neg (x, x, MPFR_RNDN); /* -0 */
62  mpfr_j1 (y, x, MPFR_RNDN);
63  MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_NEG (y)); /* j1(-0)=-0 */
64
65  mpfr_set_prec (x, 53);
66  mpfr_set_prec (y, 53);
67
68  mpfr_set_ui (x, 1, MPFR_RNDN);
69  mpfr_j1 (y, x, MPFR_RNDN);
70  mpfr_set_str_binary (x, "0.0111000010100111001001111011101001011100001100011011");
71  if (mpfr_cmp (x, y))
72    {
73      printf ("Error in mpfr_j1 for x=1, rnd=MPFR_RNDN\n");
74      printf ("Expected "); mpfr_dump (x);
75      printf ("Got      "); mpfr_dump (y);
76      exit (1);
77    }
78  mpfr_clear (x);
79  mpfr_clear (y);
80
81  test_generic (2, 100, 10);
82
83  data_check ("data/j1", mpfr_j1, "mpfr_j1");
84
85  tests_end_mpfr ();
86
87  return 0;
88}
89