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 __cacoshl = cacoshl 31 32 #include "libm.h" /* fabsl/isnanl/isinfl/signbitl */ 33 #include "complex_wrapper.h" 34 #include "longdouble.h" 35 36 /* INDENT OFF */ 37 /* 38 * ldcomplex cacoshl(ldcomplex z); 39 * cacosh z = +-i cacos z . 40 * In order to make conj(cacosh(z))=cacosh(conj(z)), 41 * we define 42 * cacosh z = sign(Im(z))*i cacos z . 43 * 44 */ 45 /* INDENT ON */ 46 47 ldcomplex cacoshl(ldcomplex z)48cacoshl(ldcomplex z) { 49 ldcomplex w, ans; 50 long double x, y; 51 52 w = cacosl(z); 53 x = LD_RE(z); 54 y = LD_IM(z); 55 if (isnanl(y)) { 56 LD_IM(ans) = y + y; 57 if (isinfl(x)) 58 LD_RE(ans) = fabsl(x); 59 else 60 LD_RE(ans) = y; 61 } else if (signbitl(y) == 0) { 62 LD_RE(ans) = -LD_IM(w); 63 LD_IM(ans) = LD_RE(w); 64 } else { 65 LD_RE(ans) = LD_IM(w); 66 LD_IM(ans) = -LD_RE(w); 67 } 68 return (ans); 69 } 70