Open64 (mfef90, whirl2f, and IR tools)
TAG: version-openad; SVN changeset: 916
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00001 /* 00002 00003 Copyright (C) 2000, 2001 Silicon Graphics, Inc. All Rights Reserved. 00004 00005 This program is free software; you can redistribute it and/or modify it 00006 under the terms of version 2.1 of the GNU Lesser General Public License 00007 as published by the Free Software Foundation. 00008 00009 This program is distributed in the hope that it would be useful, but 00010 WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 00012 00013 Further, this software is distributed without any warranty that it is 00014 free of the rightful claim of any third person regarding infringement 00015 or the like. Any license provided herein, whether implied or 00016 otherwise, applies only to this software file. Patent licenses, if 00017 any, provided herein do not apply to combinations of this program with 00018 other software, or any other product whatsoever. 00019 00020 You should have received a copy of the GNU Lesser General Public 00021 License along with this program; if not, write the Free Software 00022 Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, 00023 USA. 00024 00025 Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pky, 00026 Mountain View, CA 94043, or: 00027 00028 http://www.sgi.com 00029 00030 For further information regarding this notice, see: 00031 00032 http://oss.sgi.com/projects/GenInfo/NoticeExplan 00033 00034 */ 00035 00036 00037 /* $Header: /m_home/m_utkej/Argonne/cvs2svn/cvs/Open64/osprey1.0/libF77/z_div.c,v 1.1.1.1 2002-05-22 20:09:13 dsystem Exp $ */ 00038 #include <math.h> 00039 #include <stdlib.h> 00040 #include "cmplrs/host.h" 00041 #include "moremath.h" 00042 #include "cmplx.h" 00043 00044 dcomplex __zdiv(double_t adreal, double_t adimag, double_t bdreal, double_t bdimag) 00045 { 00046 double_t ratio, den; 00047 double_t abr, abi; 00048 dcomplex c; 00049 00050 if( (abr = bdreal) < 0.) 00051 abr = - abr; 00052 if( (abi = bdimag) < 0.) 00053 abi = - abi; 00054 if( abr <= abi ) { 00055 ratio = bdreal / bdimag ; 00056 den = bdimag * (1 + ratio*ratio); 00057 c.dreal = (adreal*ratio + adimag) / den; 00058 c.dimag = (adimag*ratio - adreal) / den; 00059 } else { 00060 ratio = bdimag / bdreal ; 00061 den = bdreal * (1 + ratio*ratio); 00062 c.dreal = (adreal + adimag*ratio) / den; 00063 c.dimag = (adimag - adreal*ratio) / den; 00064 } 00065 return c; 00066 } 00067 00068 void z_div(dcomplex *c, dcomplex *a, dcomplex *b) 00069 { 00070 *c = __zdiv(a->dreal, a->dimag, b->dreal, b->dimag); 00071 }