blob: b382b10686c59b4602c8d70b216f37783b83755d (
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
|
/* Round a 64-bit floating point value to the nearest integer.
Copyright (C) 1997-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <libm-alias-double.h>
double
__rint (double x)
{
static const float TWO52 = 4503599627370496.0;
if (fabs (x) < TWO52)
{
if (x > 0.0)
{
x += TWO52;
x -= TWO52;
}
else if (x < 0.0)
{
x = TWO52 - x;
x = -(x - TWO52);
}
}
return x;
}
libm_alias_double (__rint, rint)
|
