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 __csinhl = csinhl
31
32#include "libm.h"	/* coshl/expl/fabsl/scalbnl/sincosl/sinhl/__k_cexpl */
33#include "complex_wrapper.h"
34
35/* INDENT OFF */
36static const long double zero = 0.0L, half = 0.5L;
37/* INDENT ON */
38
39ldcomplex
40csinhl(ldcomplex z) {
41	long double t, x, y, S, C;
42	int hx, ix, hy, iy, n;
43	ldcomplex ans;
44
45	x = LD_RE(z);
46	y = LD_IM(z);
47	hx = HI_XWORD(x);
48	ix = hx & 0x7fffffff;
49	hy = HI_XWORD(y);
50	iy = hy & 0x7fffffff;
51	x = fabsl(x);
52	y = fabsl(y);
53
54	(void) sincosl(y, &S, &C);
55	if (ix >= 0x4004e000) {	/* |x| > 60 = prec/2 (14,28,34,60) */
56		if (ix >= 0x400C62E4) {	/* |x| > 11356.52... ~ log(2**16384) */
57			if (ix >= 0x7fff0000) {	/* |x| is inf or NaN */
58				if (y == zero) {
59					LD_RE(ans) = x;
60					LD_IM(ans) = y;
61				} else if (iy >= 0x7fff0000) {
62					LD_RE(ans) = x;
63					LD_IM(ans) = x - y;
64				} else {
65					LD_RE(ans) = C * x;
66					LD_IM(ans) = S * x;
67				}
68			} else {
69				/* return exp(x)=t*2**n */
70				t = __k_cexpl(x, &n);
71				LD_RE(ans) = scalbnl(C * t, n - 1);
72				LD_IM(ans) = scalbnl(S * t, n - 1);
73			}
74		} else {
75			t = expl(x) * half;
76			LD_RE(ans) = C * t;
77			LD_IM(ans) = S * t;
78		}
79	} else {
80		if (x == zero) {	/* x = 0, return (0,S) */
81			LD_RE(ans) = zero;
82			LD_IM(ans) = S;
83		} else {
84			LD_RE(ans) = C * sinhl(x);
85			LD_IM(ans) = S * coshl(x);
86		}
87	}
88	if (hx < 0)
89		LD_RE(ans) = -LD_RE(ans);
90	if (hy < 0)
91		LD_IM(ans) = -LD_IM(ans);
92	return (ans);
93}
94