xref: /illumos-gate/usr/src/lib/libm/common/complex/csinf.c (revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8)
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 /*
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  */
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29 
30 #pragma weak csinf = __csinf
31 
32 #include "libm.h"
33 #include "complex_wrapper.h"
34 
35 fcomplex
36 csinf(fcomplex z) {
37 	float x, y;
38 	fcomplex ans, ct;
39 
40 	x = F_RE(z);
41 	y = F_IM(z);
42 	F_RE(z) = y;
43 	F_IM(z) = -x;
44 	ct = csinhf(z);
45 	F_RE(ans) = -F_IM(ct);
46 	F_IM(ans) = F_RE(ct);
47 	return (ans);
48 }
49