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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * On SPARC V8, _Q_cplx_lr_div(v, z, w) sets *v = *z / *w computed 29 * by the textbook formula without regard to exceptions or special 30 * cases. 31 * 32 * On SPARC V9, _Q_cplx_lr_div(z, w) returns *z / *w. 33 * 34 * This code is intended to be used only when CX_LIMITED_RANGE is ON; 35 * otherwise use _Q_cplx_div. 36 */ 37 38 #if !defined(sparc) && !defined(__sparc) 39 #error This code is for SPARC only 40 #endif 41 42 #ifdef __sparcv9 43 long double _Complex 44 _Q_cplx_lr_div(const long double _Complex *z, const long double _Complex *w) 45 { 46 long double _Complex v = 0; 47 #else 48 void 49 _Q_cplx_lr_div(long double _Complex *v, const long double _Complex *z, 50 const long double _Complex *w) 51 { 52 #endif 53 long double a, b, c, d, r; 54 55 a = ((long double *)z)[0]; 56 b = ((long double *)z)[1]; 57 c = ((long double *)w)[0]; 58 d = ((long double *)w)[1]; 59 60 r = 1.0L / (c * c + d * d); 61 62 #ifdef __sparcv9 63 ((long double *)&v)[0] = (a * c + b * d) * r; 64 ((long double *)&v)[1] = (b * c - a * d) * r; 65 return (v); 66 #else 67 ((long double *)v)[0] = (a * c + b * d) * r; 68 ((long double *)v)[1] = (b * c - a * d) * r; 69 #endif 70 } 71