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
|
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
FUNCTION
<<nearbyint>>, <<nearbyintf>>---round to integer
INDEX
nearbyint
INDEX
nearbyintf
ANSI_SYNOPSIS
#include <math.h>
double nearbyint(double <[x]>);
float nearbyintf(float <[x]>);
DESCRIPTION
The <<nearbyint>> functions round their argument to an integer value in
floating-point format, using the current rounding direction and
(supposedly) without raising the "inexact" floating-point exception.
See the <<rint>> functions for the same function with the "inexact"
floating-point exception being raised when appropriate.
BUGS
Newlib does not support the floating-point exception model, so that
the floating-point exception control is not present and thereby what may
be seen will be compiler and hardware dependent in this regard.
The Newlib <<nearbyint>> functions are identical to the <<rint>>
functions with respect to the floating-point exception behavior, and
will cause the "inexact" exception to be raised for most targets.
RETURNS
<[x]> rounded to an integral value, using the current rounding direction.
PORTABILITY
ANSI C, POSIX
SEEALSO
<<rint>>, <<round>>
*/
#include <math.h>
#include "fdlibm.h"
#ifndef _DOUBLE_IS_32BITS
#ifdef __STDC__
double nearbyint(double x)
#else
double nearbyint(x)
double x;
#endif
{
return rint(x);
}
#endif /* _DOUBLE_IS_32BITS */
|
