1 |
|
|
/* $OpenBSD: s_fmin.c,v 1.11 2016/09/12 19:47:02 guenther Exp $ */ |
2 |
|
|
/*- |
3 |
|
|
* Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> |
4 |
|
|
* All rights reserved. |
5 |
|
|
* |
6 |
|
|
* Redistribution and use in source and binary forms, with or without |
7 |
|
|
* modification, are permitted provided that the following conditions |
8 |
|
|
* are met: |
9 |
|
|
* 1. Redistributions of source code must retain the above copyright |
10 |
|
|
* notice, this list of conditions and the following disclaimer. |
11 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
12 |
|
|
* notice, this list of conditions and the following disclaimer in the |
13 |
|
|
* documentation and/or other materials provided with the distribution. |
14 |
|
|
* |
15 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
16 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
18 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
19 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
21 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
22 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
23 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 |
|
|
* SUCH DAMAGE. |
26 |
|
|
*/ |
27 |
|
|
|
28 |
|
|
#include <float.h> |
29 |
|
|
#include <math.h> |
30 |
|
|
|
31 |
|
|
double |
32 |
|
|
fmin(double x, double y) |
33 |
|
|
{ |
34 |
|
|
/* Check for NaNs to avoid raising spurious exceptions. */ |
35 |
|
|
if (isnan(x)) |
36 |
|
|
return (y); |
37 |
|
|
if (isnan(y)) |
38 |
|
|
return (x); |
39 |
|
|
|
40 |
|
|
/* Handle comparisons of signed zeroes. */ |
41 |
|
|
if (signbit(x) != signbit(y)) { |
42 |
|
|
if (signbit(y)) |
43 |
|
|
return (y); |
44 |
|
|
else |
45 |
|
|
return (x); |
46 |
|
|
} |
47 |
|
|
|
48 |
|
|
return (x < y ? x : y); |
49 |
|
|
} |
50 |
|
|
DEF_STD(fmin); |
51 |
|
|
LDBL_MAYBE_UNUSED_CLONE(fmin); |