1/* Test file for mpfr_add_ui
2
3Copyright 2000-2023 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 <float.h>
24
25#include "mpfr-test.h"
26
27/* checks that x+y gives the right results with 53 bits of precision */
28static void
29check3 (const char *xs, unsigned long y, mpfr_rnd_t rnd_mode, const char *zs)
30{
31  mpfr_t xx, zz;
32
33  mpfr_inits2 (53, xx, zz, (mpfr_ptr) 0);
34  mpfr_set_str1 (xx, xs);
35  mpfr_add_ui (zz, xx, y, rnd_mode);
36  if (mpfr_cmp_str1(zz, zs) )
37    {
38      printf ("expected sum is %s, got ",zs);
39      mpfr_out_str(stdout, 10, 0, zz, MPFR_RNDN);
40      printf ("\nmpfr_add_ui failed for x=%s y=%lu with rnd_mode=%s\n",
41              xs, y, mpfr_print_rnd_mode(rnd_mode));
42      exit (1);
43  }
44  mpfr_clears (xx, zz, (mpfr_ptr) 0);
45}
46
47static void
48special (void)
49{
50  mpfr_t x, y;
51
52  mpfr_init2 (x, 63);
53  mpfr_init2 (y, 63);
54  mpfr_set_str_binary (x, "0.110100000000000001110001110010111111000000000101100011100100011");
55  mpfr_add_ui (y, x, 1, MPFR_RNDD);
56  mpfr_clear (x);
57  mpfr_clear (y);
58}
59
60static void
61check_nans (void)
62{
63  mpfr_t  x, y;
64
65  mpfr_init2 (x, 123L);
66  mpfr_init2 (y, 123L);
67
68  /* nan + 2394875 == nan */
69  mpfr_set_nan (x);
70  mpfr_clear_nanflag ();
71  mpfr_add_ui (y, x, 2394875L, MPFR_RNDN);
72  MPFR_ASSERTN (mpfr_nanflag_p ());
73  MPFR_ASSERTN (mpfr_nan_p (y));
74
75  /* +inf + 2394875 == +inf */
76  mpfr_set_inf (x, 1);
77  mpfr_add_ui (y, x, 2394875L, MPFR_RNDN);
78  MPFR_ASSERTN (mpfr_inf_p (y));
79  MPFR_ASSERTN (mpfr_sgn (y) > 0);
80
81  /* -inf + 2394875 == -inf */
82  mpfr_set_inf (x, -1);
83  mpfr_add_ui (y, x, 2394875L, MPFR_RNDN);
84  MPFR_ASSERTN (mpfr_inf_p (y));
85  MPFR_ASSERTN (mpfr_sgn (y) < 0);
86
87  mpfr_clear (x);
88  mpfr_clear (y);
89}
90
91#define TEST_FUNCTION mpfr_add_ui
92#define ULONG_ARG2
93#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
94#include "tgeneric.c"
95
96int
97main (int argc, char *argv[])
98{
99  tests_start_mpfr ();
100
101  check_nans ();
102
103  special ();
104  check3 ("-1.716113812768534e-140", 1271212614, MPFR_RNDZ,
105          "1.27121261399999976e9");
106  check3 ("1.22191250737771397120e+20", 948002822, MPFR_RNDN,
107          "122191250738719408128.0");
108  check3 ("-6.72658901114033715233e-165", 2000878121, MPFR_RNDZ,
109          "2.0008781209999997615e9");
110  check3 ("-2.0769715792901673e-5", 880524, MPFR_RNDN,
111          "8.8052399997923023e5");
112
113  test_generic (MPFR_PREC_MIN, 1000, 100);
114
115  tests_end_mpfr ();
116  return 0;
117}
118