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
|
/* Test <ieee754.h>.
Copyright 2018-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
#include <config.h>
#include <ieee754.h>
#include <stdio.h>
static struct {
float x;
unsigned sign; unsigned exponent; unsigned frac;
} const float_tests[] =
{
{0, 0, 0, 0},
{-0.0, 1, 0, 0},
{0.1, 0, 0x7b, 0x4ccccd}
};
static struct {
double x;
unsigned sign; unsigned exponent; unsigned frac_hi; unsigned frac_lo;
} const double_tests[] =
{
{0, 0, 0, 0},
{-0.0, 1, 0, 0 },
{0.1, 0, 0x3fb, 0x99999, 0x9999999a}
};
int
main (void)
{
int i;
for (i = 0; i < sizeof float_tests / sizeof *float_tests; i++)
{
union ieee754_float u;
u.f = float_tests[i].x;
if (float_tests[i].sign != u.ieee.negative)
return 1;
if (float_tests[i].exponent != u.ieee.exponent)
return 2;
if (float_tests[i].frac != u.ieee.mantissa)
return 3;
}
for (i = 0; i < sizeof double_tests / sizeof *double_tests; i++)
{
union ieee754_double u;
u.d = double_tests[i].x;
if (double_tests[i].sign != u.ieee.negative)
return 4;
if (double_tests[i].exponent != u.ieee.exponent)
return 5;
if (double_tests[i].frac_hi != u.ieee.mantissa0)
return 6;
if (double_tests[i].frac_lo != u.ieee.mantissa1)
return 7;
}
return 0;
}
|
