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
140
141
|
/* Test file for mpfr_mul_d
Copyright 2007-2021 Free Software Foundation, Inc.
Contributed by the AriC 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/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <float.h>
#include "mpfr-test.h"
static void
check_nans (void)
{
mpfr_t x, y;
int inexact;
mpfr_init2 (x, 123);
mpfr_init2 (y, 123);
/* nan * 1.0 is nan */
mpfr_set_nan (x);
mpfr_clear_flags();
inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
MPFR_ASSERTN (inexact == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
MPFR_ASSERTN (mpfr_nan_p (y));
/* +inf * 1.0 == +inf */
mpfr_set_inf (x, 1);
mpfr_clear_flags();
inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
MPFR_ASSERTN (inexact == 0);
MPFR_ASSERTN (__gmpfr_flags == 0);
MPFR_ASSERTN (mpfr_inf_p (y));
MPFR_ASSERTN (MPFR_IS_POS (y));
/* +inf * 0.0 is nan */
mpfr_clear_flags();
inexact = mpfr_mul_d (y, x, 0.0, MPFR_RNDN);
MPFR_ASSERTN (inexact == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
MPFR_ASSERTN (mpfr_nan_p (y));
/* -inf * 1.0 == -inf */
mpfr_set_inf (x, -1);
mpfr_clear_flags();
inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN);
MPFR_ASSERTN (inexact == 0);
MPFR_ASSERTN (__gmpfr_flags == 0);
MPFR_ASSERTN (mpfr_inf_p (y));
MPFR_ASSERTN (MPFR_IS_NEG (y));
mpfr_clear (x);
mpfr_clear (y);
}
static void
bug20171218 (void)
{
mpfr_t a, b;
mpfr_init2 (a, 22);
mpfr_init2 (b, 1312);
mpfr_set_str (b, "1.ffffffffffffffffffc3e0007ffe000700fff8001fff800000000007e0fffe0007fffffff00001f800000003ffffffe1fc00000003fffe7c03ffffffffffffffe000000fffffffff83f0000007ffc03ffffffffc0007ff0000ffcfffffe00000f80000000003c007ffffffff3ff807ffffffffff000000000000001fc000fffe000600000ff0003ffe00fffffffc00001ffc0fffffffffff00000807fe03ffffffc01ffe", 16, MPFR_RNDN);
mpfr_mul_d (a, b, 0.5, MPFR_RNDF);
/* a should be 1 or nextbelow(1) */
if (mpfr_cmp_ui (a, 1) != 0)
{
mpfr_nextabove (a);
MPFR_ASSERTN(mpfr_cmp_ui (a, 1) == 0);
}
mpfr_clear (a);
mpfr_clear (b);
}
#define TEST_FUNCTION mpfr_mul_d
#define DOUBLE_ARG2
#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
#include "tgeneric.c"
int
main (void)
{
mpfr_t x, y, z;
double d;
int inexact;
tests_start_mpfr ();
bug20171218 ();
/* check with enough precision */
mpfr_init2 (x, IEEE_DBL_MANT_DIG);
mpfr_init2 (y, IEEE_DBL_MANT_DIG);
mpfr_init2 (z, IEEE_DBL_MANT_DIG);
mpfr_set_str (y, "4096", 10, MPFR_RNDN);
d = 0.125;
mpfr_clear_flags ();
inexact = mpfr_mul_d (x, y, d, MPFR_RNDN);
if (inexact != 0)
{
printf ("Inexact flag error in mpfr_mul_d\n");
exit (1);
}
mpfr_set_str (z, "512", 10, MPFR_RNDN);
if (mpfr_cmp (z, x))
{
printf ("Error in mpfr_mul_d (");
mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN);
printf (" + %.20g)\nexpected ", d);
mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN);
printf ("\ngot ");
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
printf ("\n");
exit (1);
}
mpfr_clears (x, y, z, (mpfr_ptr) 0);
check_nans ();
test_generic (MPFR_PREC_MIN, 1000, 100);
tests_end_mpfr ();
return 0;
}
|
