1/*
2 * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * __ieee754_scalb(x, fn) is provide for
28 * passing various standard test suite. One
29 * should use scalbn() instead.
30 */
31
32#include "fdlibm.h"
33
34#ifdef _SCALB_INT
35#ifdef __STDC__
36 double __ieee754_scalb(double x, int fn)
37#else
38 double __ieee754_scalb(x,fn)
39 double x; int fn;
40#endif
41#else
42#ifdef __STDC__
43 double __ieee754_scalb(double x, double fn)
44#else
45 double __ieee754_scalb(x,fn)
46 double x, fn;
47#endif
48#endif
49{
50#ifdef _SCALB_INT
51 return scalbn(x,fn);
52#else
53 if (isnan(x)||isnan(fn)) return x*fn;
54 if (!finite(fn)) {
55 if(fn>0.0) return x*fn;
56 else return x/(-fn);
57 }
58 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
59 if ( fn > 65000.0) return scalbn(x, 65000);
60 if (-fn > 65000.0) return scalbn(x,-65000);
61 return scalbn(x,(int)fn);
62#endif
63}
64