125c28e8Piotr Jasiukajtis/*
225c28e8Piotr Jasiukajtis * CDDL HEADER START
325c28e8Piotr Jasiukajtis *
425c28e8Piotr Jasiukajtis * The contents of this file are subject to the terms of the
525c28e8Piotr Jasiukajtis * Common Development and Distribution License (the "License").
625c28e8Piotr Jasiukajtis * You may not use this file except in compliance with the License.
725c28e8Piotr Jasiukajtis *
825c28e8Piotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
925c28e8Piotr Jasiukajtis * or http://www.opensolaris.org/os/licensing.
1025c28e8Piotr Jasiukajtis * See the License for the specific language governing permissions
1125c28e8Piotr Jasiukajtis * and limitations under the License.
1225c28e8Piotr Jasiukajtis *
1325c28e8Piotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each
1425c28e8Piotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
1525c28e8Piotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the
1625c28e8Piotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying
1725c28e8Piotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner]
1825c28e8Piotr Jasiukajtis *
1925c28e8Piotr Jasiukajtis * CDDL HEADER END
2025c28e8Piotr Jasiukajtis */
2125c28e8Piotr Jasiukajtis
2225c28e8Piotr Jasiukajtis/*
2325c28e8Piotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2425c28e8Piotr Jasiukajtis */
2525c28e8Piotr Jasiukajtis/*
2625c28e8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2725c28e8Piotr Jasiukajtis * Use is subject to license terms.
2825c28e8Piotr Jasiukajtis */
2925c28e8Piotr Jasiukajtis
30ddc0e0bRichard Lowe#pragma weak __cacoshl = cacoshl
3125c28e8Piotr Jasiukajtis
3225c28e8Piotr Jasiukajtis#include "libm.h"	/* fabsl/isnanl/isinfl/signbitl */
3325c28e8Piotr Jasiukajtis#include "complex_wrapper.h"
3425c28e8Piotr Jasiukajtis#include "longdouble.h"
3525c28e8Piotr Jasiukajtis
3625c28e8Piotr Jasiukajtis/* INDENT OFF */
3725c28e8Piotr Jasiukajtis/*
3825c28e8Piotr Jasiukajtis * ldcomplex cacoshl(ldcomplex z);
3925c28e8Piotr Jasiukajtis *	cacosh z = +-i cacos z .
4025c28e8Piotr Jasiukajtis * In order to make conj(cacosh(z))=cacosh(conj(z)),
4125c28e8Piotr Jasiukajtis * we define
4225c28e8Piotr Jasiukajtis *	cacosh z = sign(Im(z))*i cacos z .
4325c28e8Piotr Jasiukajtis *
4425c28e8Piotr Jasiukajtis */
4525c28e8Piotr Jasiukajtis/* INDENT ON */
4625c28e8Piotr Jasiukajtis
4725c28e8Piotr Jasiukajtisldcomplex
4825c28e8Piotr Jasiukajtiscacoshl(ldcomplex z) {
4925c28e8Piotr Jasiukajtis	ldcomplex w, ans;
5025c28e8Piotr Jasiukajtis	long double x, y;
5125c28e8Piotr Jasiukajtis
5225c28e8Piotr Jasiukajtis	w = cacosl(z);
5325c28e8Piotr Jasiukajtis	x = LD_RE(z);
5425c28e8Piotr Jasiukajtis	y = LD_IM(z);
5525c28e8Piotr Jasiukajtis	if (isnanl(y)) {
5625c28e8Piotr Jasiukajtis		LD_IM(ans) = y + y;
5725c28e8Piotr Jasiukajtis		if (isinfl(x))
5825c28e8Piotr Jasiukajtis			LD_RE(ans) = fabsl(x);
5925c28e8Piotr Jasiukajtis		else
6025c28e8Piotr Jasiukajtis			LD_RE(ans) = y;
6125c28e8Piotr Jasiukajtis	} else if (signbitl(y) == 0) {
6225c28e8Piotr Jasiukajtis		LD_RE(ans) = -LD_IM(w);
6325c28e8Piotr Jasiukajtis		LD_IM(ans) = LD_RE(w);
6425c28e8Piotr Jasiukajtis	} else {
6525c28e8Piotr Jasiukajtis		LD_RE(ans) = LD_IM(w);
6625c28e8Piotr Jasiukajtis		LD_IM(ans) = -LD_RE(w);
6725c28e8Piotr Jasiukajtis	}
6825c28e8Piotr Jasiukajtis	return (ans);
6925c28e8Piotr Jasiukajtis}