blob: 1e17db3f2e91a7ef8ed64a4b4b65916982646234 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak cacoshl = __cacoshl
#include "libm.h" /* fabsl/isnanl/isinfl/signbitl */
#include "complex_wrapper.h"
#include "longdouble.h"
/* INDENT OFF */
/*
* ldcomplex cacoshl(ldcomplex z);
* cacosh z = +-i cacos z .
* In order to make conj(cacosh(z))=cacosh(conj(z)),
* we define
* cacosh z = sign(Im(z))*i cacos z .
*
*/
/* INDENT ON */
ldcomplex
cacoshl(ldcomplex z) {
ldcomplex w, ans;
long double x, y;
w = cacosl(z);
x = LD_RE(z);
y = LD_IM(z);
if (isnanl(y)) {
LD_IM(ans) = y + y;
if (isinfl(x))
LD_RE(ans) = fabsl(x);
else
LD_RE(ans) = y;
} else if (signbitl(y) == 0) {
LD_RE(ans) = -LD_IM(w);
LD_IM(ans) = LD_RE(w);
} else {
LD_RE(ans) = LD_IM(w);
LD_IM(ans) = -LD_RE(w);
}
return (ans);
}
|
