1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- 2 * 3 * ***** BEGIN LICENSE BLOCK ***** 4 * Version: MPL 1.1/GPL 2.0/LGPL 2.1 5 * 6 * The contents of this file are subject to the Mozilla Public License Version 7 * 1.1 (the "License"); you may not use this file except in compliance with 8 * the License. You may obtain a copy of the License at 9 * http://www.mozilla.org/MPL/ 10 * 11 * Software distributed under the License is distributed on an "AS IS" basis, 12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 13 * for the specific language governing rights and limitations under the 14 * License. 15 * 16 * The Original Code is Mozilla Communicator client code, released 17 * March 31, 1998. 18 * 19 * The Initial Developer of the Original Code is 20 * Sun Microsystems, Inc. 21 * Portions created by the Initial Developer are Copyright (C) 1998 22 * the Initial Developer. All Rights Reserved. 23 * 24 * Contributor(s): 25 * 26 * Alternatively, the contents of this file may be used under the terms of 27 * either of the GNU General Public License Version 2 or later (the "GPL"), 28 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), 29 * in which case the provisions of the GPL or the LGPL are applicable instead 30 * of those above. If you wish to allow use of your version of this file only 31 * under the terms of either the GPL or the LGPL, and not to allow others to 32 * use your version of this file under the terms of the MPL, indicate your 33 * decision by deleting the provisions above and replace them with the notice 34 * and other provisions required by the GPL or the LGPL. If you do not delete 35 * the provisions above, a recipient may use your version of this file under 36 * the terms of any one of the MPL, the GPL or the LGPL. 37 * 38 * ***** END LICENSE BLOCK ***** */ 39 40 /* @(#)e_scalb.c 1.3 95/01/18 */ 41 /* 42 * ==================================================== 43 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 44 * 45 * Developed at SunSoft, a Sun Microsystems, Inc. business. 46 * Permission to use, copy, modify, and distribute this 47 * software is freely granted, provided that this notice 48 * is preserved. 49 * ==================================================== 50 */ 51 52 /* 53 * __ieee754_scalb(x, fn) is provide for 54 * passing various standard test suite. One 55 * should use scalbn() instead. 56 */ 57 58 #include "fdlibm.h" 59 60 #ifdef _SCALB_INT 61 #ifdef __STDC__ __ieee754_scalb(double x,int fn)62 double __ieee754_scalb(double x, int fn) 63 #else 64 double __ieee754_scalb(x,fn) 65 double x; int fn; 66 #endif 67 #else 68 #ifdef __STDC__ 69 double __ieee754_scalb(double x, double fn) 70 #else 71 double __ieee754_scalb(x,fn) 72 double x, fn; 73 #endif 74 #endif 75 { 76 #ifdef _SCALB_INT 77 return fd_scalbn(x,fn); 78 #else 79 if (fd_isnan(x)||fd_isnan(fn)) return x*fn; 80 if (!fd_finite(fn)) { 81 if(fn>0.0) return x*fn; 82 else return x/(-fn); 83 } 84 if (fd_rint(fn)!=fn) return (fn-fn)/(fn-fn); 85 if ( fn > 65000.0) return fd_scalbn(x, 65000); 86 if (-fn > 65000.0) return fd_scalbn(x,-65000); 87 return fd_scalbn(x,(int)fn); 88 #endif 89 } 90