1 /*	$OpenBSD: s_nearbyint.c,v 1.1 2011/04/28 18:05:39 martynas Exp $	*/
2 
3 /*
4  * Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <fenv.h>
20 #include <math.h>
21 
22 double
23 nearbyint(double x)
24 {
25 	fenv_t fenv;
26 	double res;
27 
28 	feholdexcept(&fenv);
29 	res = rint(x);
30 	fesetenv(&fenv);
31 
32 	return (res);
33 }
34 
35 float
36 nearbyintf(float x)
37 {
38 	fenv_t fenv;
39 	float res;
40 
41 	feholdexcept(&fenv);
42 	res = rintf(x);
43 	fesetenv(&fenv);
44 
45 	return (res);
46 }
47 
48 long double
49 nearbyintl(long double x)
50 {
51 	fenv_t fenv;
52 	long double res;
53 
54 	feholdexcept(&fenv);
55 	res = rintl(x);
56 	fesetenv(&fenv);
57 
58 	return (res);
59 }
60