1 /* @(#)w_scalb.c 5.1 93/09/24 */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
10 * ====================================================
12 * $FreeBSD: src/lib/msun/src/w_scalb.c,v 1.5 1999/08/28 00:07:08 peter Exp $
13 * $DragonFly: src/lib/msun/src/Attic/w_scalb.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
17 * wrapper scalb(double x, double fn) is provide for
18 * passing various standard test suite. One
19 * should use scalbn() instead.
23 #include "math_private.h"
29 double scalb(double x, int fn) /* wrapper scalb */
31 double scalb(double x, double fn) /* wrapper scalb */
34 double scalb(x,fn) /* wrapper scalb */
43 return __ieee754_scalb(x,fn);
46 z = __ieee754_scalb(x,fn);
47 if(_LIB_VERSION == _IEEE_) return z;
48 if(!(finite(z)||isnan(z))&&finite(x)) {
49 return __kernel_standard(x,(double)fn,32); /* scalb overflow */
52 return __kernel_standard(x,(double)fn,33); /* scalb underflow */
55 if(!finite(fn)) errno = ERANGE;