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
nearbyint(double x)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
nearbyintf(float x)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
nearbyintl(long double x)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