xref: /illumos-gate/usr/src/lib/libm/common/C/sqrt.c (revision d8e10381a0083d7717710b0db7e64707bc0f3ff8)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
23  */
24 /*
25  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
26  * Use is subject to license terms.
27  */
28 
29 #pragma weak __sqrt = sqrt
30 
31 #include "libm.h"
32 
33 
34 extern double __inline_sqrt(double);
35 
36 double
37 sqrt(double x) {
38 	double	z = __inline_sqrt(x);
39 
40 	if (isnan(x))
41 		return (z);
42 	return ((x < 0.0)? _SVID_libm_err(x, x, 26) : z);
43 }
44 
45