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 * ====================================================
14 static char rcsid[] = "$Id$";
18 * wrapper scalb(double x, double fn) is provide for
19 * passing various standard test suite. One
20 * should use scalbn() instead.
24 #include "math_private.h"
30 double scalb(double x, int fn) /* wrapper scalb */
32 double scalb(double x, double fn) /* wrapper scalb */
35 double scalb(x,fn) /* wrapper scalb */
44 return __ieee754_scalb(x,fn);
47 z = __ieee754_scalb(x,fn);
48 if(_LIB_VERSION == _IEEE_) return z;
49 if(!(finite(z)||isnan(z))&&finite(x)) {
50 return __kernel_standard(x,(double)fn,32); /* scalb overflow */
53 return __kernel_standard(x,(double)fn,33); /* scalb underflow */
56 if(!finite(fn)) errno = ERANGE;