blob: b5e063898b89c9b070afe14496b1eead927a1849 (
plain) (
blame)
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
|
/* Round float value to long int.
Copyright (C) 1997-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C 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 2.1 of the License, or (at your option) any later version.
The GNU C 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 C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
long int
__lroundf (float x)
{
int32_t j0;
u_int32_t i;
long int result;
int sign;
GET_FLOAT_WORD (i, x);
j0 = ((i >> 23) & 0xff) - 0x7f;
sign = (i & 0x80000000) != 0 ? -1 : 1;
i &= 0x7fffff;
i |= 0x800000;
if (j0 < (int32_t) (8 * sizeof (long int)) - 1)
{
if (j0 < 0)
return j0 < -1 ? 0 : sign;
else if (j0 >= 23)
result = (long int) i << (j0 - 23);
else
{
i += 0x400000 >> j0;
result = i >> (23 - j0);
}
}
else
{
/* The number is too large. It is left implementation defined
what happens. */
return (long int) x;
}
return sign * result;
}
weak_alias (__lroundf, lroundf)
|
