1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Test file for mpfr_grandom
Copyright 2011-2025 Free Software Foundation, Inc.
Contributed by the Pascaline and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER.
If not, see <https://www.gnu.org/licenses/>. */
#define _MPFR_NO_DEPRECATED_GRANDOM
#include "mpfr-test.h"
static void
test_special (mpfr_prec_t p)
{
mpfr_t x;
int inexact;
mpfr_init2 (x, p);
inexact = mpfr_grandom (x, NULL, RANDS, MPFR_RNDN);
if (((unsigned int) inexact & 3) == 0)
{
printf ("Error: mpfr_grandom() returns a zero ternary value.\n");
exit (1);
}
if (((unsigned int) inexact & (3 << 2)) != 0)
{
printf ("Error: the second ternary value of mpfr_grandom(x, NULL, ...)"
" must be 0.\n");
exit (1);
}
mpfr_clear (x);
}
static void
test_grandom (long nbtests, mpfr_prec_t prec, mpfr_rnd_t rnd,
int verbose)
{
mpfr_t *t;
int i, inexact;
nbtests = (nbtests & 1) ? (nbtests + 1) : nbtests;
t = (mpfr_t *) tests_allocate (nbtests * sizeof (mpfr_t));
for (i = 0; i < nbtests; ++i)
mpfr_init2 (t[i], prec);
for (i = 0; i < nbtests; i += 2)
{
inexact = mpfr_grandom (t[i], t[i + 1], RANDS, MPFR_RNDN);
if (((unsigned int) inexact & 3) == 0 ||
((unsigned int) inexact & (3 << 2)) == 0)
{
/* one call in the loop pretended to return an exact number! */
printf ("Error: mpfr_grandom() returns a zero ternary value.\n");
exit (1);
}
}
#if defined(HAVE_STDARG) && !defined(MPFR_USE_MINI_GMP)
if (verbose)
{
mpfr_t av, va, tmp;
mpfr_init2 (av, prec);
mpfr_init2 (va, prec);
mpfr_init2 (tmp, prec);
mpfr_set_ui (av, 0, MPFR_RNDN);
mpfr_set_ui (va, 0, MPFR_RNDN);
for (i = 0; i < nbtests; ++i)
{
mpfr_add (av, av, t[i], MPFR_RNDN);
mpfr_sqr (tmp, t[i], MPFR_RNDN);
mpfr_add (va, va, tmp, MPFR_RNDN);
}
mpfr_div_ui (av, av, nbtests, MPFR_RNDN);
mpfr_div_ui (va, va, nbtests, MPFR_RNDN);
mpfr_sqr (tmp, av, MPFR_RNDN);
mpfr_sub (va, va, av, MPFR_RNDN);
mpfr_printf ("Average = %.5Rf\nVariance = %.5Rf\n", av, va);
mpfr_clear (av);
mpfr_clear (va);
mpfr_clear (tmp);
}
#endif /* HAVE_STDARG */
for (i = 0; i < nbtests; ++i)
mpfr_clear (t[i]);
tests_free (t, nbtests * sizeof (mpfr_t));
return;
}
int
main (int argc, char *argv[])
{
long nbtests;
int verbose;
int i;
tests_start_mpfr ();
verbose = 0;
nbtests = 10;
if (argc > 1)
{
long a = atol (argv[1]);
verbose = 1;
if (a != 0)
nbtests = a;
}
test_grandom (nbtests, 420, MPFR_RNDN, verbose);
test_special (2);
test_special (42000);
/* the following should exercise the case "Extend by 32 bits" in grandom.c */
for (i = 0; i < 10000; i++)
test_special (1);
tests_end_mpfr ();
return 0;
}
|
