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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2325c28e83SPiotr Jasiukajtis */ 2425c28e83SPiotr Jasiukajtis /* 2525c28e83SPiotr Jasiukajtis * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 2625c28e83SPiotr Jasiukajtis * Use is subject to license terms. 2725c28e83SPiotr Jasiukajtis */ 2825c28e83SPiotr Jasiukajtis 29*ddc0e0b5SRichard Lowe #pragma weak __carg = carg 3025c28e83SPiotr Jasiukajtis 3125c28e83SPiotr Jasiukajtis #include <math.h> /* atan2 */ 3225c28e83SPiotr Jasiukajtis #include "complex_wrapper.h" 3325c28e83SPiotr Jasiukajtis 3425c28e83SPiotr Jasiukajtis static const double 3525c28e83SPiotr Jasiukajtis pi = 3.14159265358979311600e+00, 3625c28e83SPiotr Jasiukajtis pi_lo = 1.22464679914735320717e-16; 3725c28e83SPiotr Jasiukajtis 3825c28e83SPiotr Jasiukajtis double 3925c28e83SPiotr Jasiukajtis carg(dcomplex z) { 4025c28e83SPiotr Jasiukajtis int ix, iy; 4125c28e83SPiotr Jasiukajtis 4225c28e83SPiotr Jasiukajtis ix = ((int *)&(D_RE(z)))[HIWORD]; 4325c28e83SPiotr Jasiukajtis iy = ((int *)&(D_IM(z)))[HIWORD]; 4425c28e83SPiotr Jasiukajtis if ((((ix | iy) & ~0x80000000) | ((int *)&(D_RE(z)))[LOWORD] | 4525c28e83SPiotr Jasiukajtis ((int *)&(D_IM(z)))[LOWORD]) == 0) { 4625c28e83SPiotr Jasiukajtis /* x and y are both zero */ 4725c28e83SPiotr Jasiukajtis if (ix == 0) 4825c28e83SPiotr Jasiukajtis return (D_IM(z)); 4925c28e83SPiotr Jasiukajtis return ((iy == 0)? pi + pi_lo : -pi - pi_lo); 5025c28e83SPiotr Jasiukajtis } 5125c28e83SPiotr Jasiukajtis return (atan2(D_IM(z), D_RE(z))); 5225c28e83SPiotr Jasiukajtis } 53