1*25c28e83SPiotr Jasiukajtis /* 2*25c28e83SPiotr Jasiukajtis * CDDL HEADER START 3*25c28e83SPiotr Jasiukajtis * 4*25c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 5*25c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 6*25c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 7*25c28e83SPiotr Jasiukajtis * 8*25c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*25c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 10*25c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 11*25c28e83SPiotr Jasiukajtis * and limitations under the License. 12*25c28e83SPiotr Jasiukajtis * 13*25c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 14*25c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*25c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 16*25c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 17*25c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 18*25c28e83SPiotr Jasiukajtis * 19*25c28e83SPiotr Jasiukajtis * CDDL HEADER END 20*25c28e83SPiotr Jasiukajtis */ 21*25c28e83SPiotr Jasiukajtis 22*25c28e83SPiotr Jasiukajtis /* 23*25c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24*25c28e83SPiotr Jasiukajtis */ 25*25c28e83SPiotr Jasiukajtis /* 26*25c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27*25c28e83SPiotr Jasiukajtis * Use is subject to license terms. 28*25c28e83SPiotr Jasiukajtis */ 29*25c28e83SPiotr Jasiukajtis 30*25c28e83SPiotr Jasiukajtis #pragma weak csin = __csin 31*25c28e83SPiotr Jasiukajtis 32*25c28e83SPiotr Jasiukajtis /* INDENT OFF */ 33*25c28e83SPiotr Jasiukajtis /* 34*25c28e83SPiotr Jasiukajtis * dcomplex csin(dcomplex z); 35*25c28e83SPiotr Jasiukajtis * 36*25c28e83SPiotr Jasiukajtis * If z = x+iy, then since csin(iz) = i*csinh(z), we have 37*25c28e83SPiotr Jasiukajtis * 38*25c28e83SPiotr Jasiukajtis * csin(z) = csin((-1)*(-z)) = csin(i*i*(-z)) 39*25c28e83SPiotr Jasiukajtis * = i*csinh(i*(-z)) = i*csinh(i*(-x-yi)) 40*25c28e83SPiotr Jasiukajtis * = i*csinh(y-ix) 41*25c28e83SPiotr Jasiukajtis * = -Im(csinh(y-ix))+i*Re(csinh(y-ix)) 42*25c28e83SPiotr Jasiukajtis */ 43*25c28e83SPiotr Jasiukajtis /* INDENT ON */ 44*25c28e83SPiotr Jasiukajtis 45*25c28e83SPiotr Jasiukajtis #include "libm.h" 46*25c28e83SPiotr Jasiukajtis #include "complex_wrapper.h" 47*25c28e83SPiotr Jasiukajtis 48*25c28e83SPiotr Jasiukajtis dcomplex 49*25c28e83SPiotr Jasiukajtis csin(dcomplex z) { 50*25c28e83SPiotr Jasiukajtis double x, y; 51*25c28e83SPiotr Jasiukajtis dcomplex ans, ct; 52*25c28e83SPiotr Jasiukajtis 53*25c28e83SPiotr Jasiukajtis x = D_RE(z); 54*25c28e83SPiotr Jasiukajtis y = D_IM(z); 55*25c28e83SPiotr Jasiukajtis D_RE(z) = y; 56*25c28e83SPiotr Jasiukajtis D_IM(z) = -x; 57*25c28e83SPiotr Jasiukajtis ct = csinh(z); 58*25c28e83SPiotr Jasiukajtis D_RE(ans) = -D_IM(ct); 59*25c28e83SPiotr Jasiukajtis D_IM(ans) = D_RE(ct); 60*25c28e83SPiotr Jasiukajtis return (ans); 61*25c28e83SPiotr Jasiukajtis } 62