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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * On SPARC V8, _Q_cplx_lr_div(v, z, w) sets *v = *z / *w computed 31 * by the textbook formula without regard to exceptions or special 32 * cases. 33 * 34 * On SPARC V9, _Q_cplx_lr_div(z, w) returns *z / *w. 35 * 36 * This code is intended to be used only when CX_LIMITED_RANGE is ON; 37 * otherwise use _Q_cplx_div. 38 */ 39 40 #if !defined(sparc) && !defined(__sparc) 41 #error This code is for SPARC only 42 #endif 43 44 #ifdef __sparcv9 45 long double _Complex 46 _Q_cplx_lr_div(const long double _Complex *z, const long double _Complex *w) 47 { 48 long double _Complex v; 49 #else 50 void 51 _Q_cplx_lr_div(long double _Complex *v, const long double _Complex *z, 52 const long double _Complex *w) 53 { 54 #endif 55 long double a, b, c, d, r; 56 57 a = ((long double *)z)[0]; 58 b = ((long double *)z)[1]; 59 c = ((long double *)w)[0]; 60 d = ((long double *)w)[1]; 61 62 r = 1.0L / (c * c + d * d); 63 64 #ifdef __sparcv9 65 ((long double *)&v)[0] = (a * c + b * d) * r; 66 ((long double *)&v)[1] = (b * c - a * d) * r; 67 return (v); 68 #else 69 ((long double *)v)[0] = (a * c + b * d) * r; 70 ((long double *)v)[1] = (b * c - a * d) * r; 71 #endif 72 } 73