125c28e83SPiotr Jasiukajtis /* 225c28e83SPiotr Jasiukajtis * CDDL HEADER START 325c28e83SPiotr Jasiukajtis * 425c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 525c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 625c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 725c28e83SPiotr Jasiukajtis * 825c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 925c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 1025c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 1125c28e83SPiotr Jasiukajtis * and limitations under the License. 1225c28e83SPiotr Jasiukajtis * 1325c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 1425c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 1525c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 1625c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 1725c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 1825c28e83SPiotr Jasiukajtis * 1925c28e83SPiotr Jasiukajtis * CDDL HEADER END 2025c28e83SPiotr Jasiukajtis */ 2125c28e83SPiotr Jasiukajtis 2225c28e83SPiotr Jasiukajtis /* 2325c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2425c28e83SPiotr Jasiukajtis */ 2525c28e83SPiotr Jasiukajtis /* 2625c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 2725c28e83SPiotr Jasiukajtis * Use is subject to license terms. 2825c28e83SPiotr Jasiukajtis */ 2925c28e83SPiotr Jasiukajtis 30*ddc0e0b5SRichard Lowe #pragma weak __cacosh = cacosh 3125c28e83SPiotr Jasiukajtis 3225c28e83SPiotr Jasiukajtis /* INDENT OFF */ 3325c28e83SPiotr Jasiukajtis /* 3425c28e83SPiotr Jasiukajtis * dcomplex cacosh(dcomplex z); 3525c28e83SPiotr Jasiukajtis * cacosh z = +-i cacos z . 3625c28e83SPiotr Jasiukajtis * In order to make conj(cacosh(z))=cacosh(conj(z)), 3725c28e83SPiotr Jasiukajtis * we define 3825c28e83SPiotr Jasiukajtis * cacosh z = sign(Im(z))*i cacos z . 3925c28e83SPiotr Jasiukajtis * 4025c28e83SPiotr Jasiukajtis */ 4125c28e83SPiotr Jasiukajtis /* INDENT ON */ 4225c28e83SPiotr Jasiukajtis 4325c28e83SPiotr Jasiukajtis #include "libm.h" /* fabs/isnan/isinf/signbit */ 4425c28e83SPiotr Jasiukajtis #include "complex_wrapper.h" 4525c28e83SPiotr Jasiukajtis 4625c28e83SPiotr Jasiukajtis /* need to work on special cases according to spec */ 4725c28e83SPiotr Jasiukajtis 4825c28e83SPiotr Jasiukajtis dcomplex 4925c28e83SPiotr Jasiukajtis cacosh(dcomplex z) { 5025c28e83SPiotr Jasiukajtis dcomplex w, ans; 5125c28e83SPiotr Jasiukajtis double x, y; 5225c28e83SPiotr Jasiukajtis 5325c28e83SPiotr Jasiukajtis w = cacos(z); 5425c28e83SPiotr Jasiukajtis x = D_RE(z); 5525c28e83SPiotr Jasiukajtis y = D_IM(z); 5625c28e83SPiotr Jasiukajtis if (isnan(y)) { 5725c28e83SPiotr Jasiukajtis D_IM(ans) = y + y; 5825c28e83SPiotr Jasiukajtis if (isinf(x)) 5925c28e83SPiotr Jasiukajtis D_RE(ans) = fabs(x); 6025c28e83SPiotr Jasiukajtis else 6125c28e83SPiotr Jasiukajtis D_RE(ans) = y; 6225c28e83SPiotr Jasiukajtis } else if (signbit(y) == 0) { 6325c28e83SPiotr Jasiukajtis D_RE(ans) = -D_IM(w); 6425c28e83SPiotr Jasiukajtis D_IM(ans) = D_RE(w); 6525c28e83SPiotr Jasiukajtis } else { 6625c28e83SPiotr Jasiukajtis D_RE(ans) = D_IM(w); 6725c28e83SPiotr Jasiukajtis D_IM(ans) = -D_RE(w); 6825c28e83SPiotr Jasiukajtis } 6925c28e83SPiotr Jasiukajtis return (ans); 7025c28e83SPiotr Jasiukajtis } 71