/* @(#)e_scalb.c 5.1 93/09/24 */ /* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== */ #ifndef lint static char rcsid[] = "$Id: e_scalb.c,v 1.1.1.1 1994/08/19 09:39:44 jkh Exp $"; #endif /* * __ieee754_scalb(x, fn) is provide for * passing various standard test suite. One * should use scalbn() instead. */ #include "math.h" #include "math_private.h" #ifdef _SCALB_INT #ifdef __STDC__ double __ieee754_scalb(double x, int fn) #else double __ieee754_scalb(x,fn) double x; int fn; #endif #else #ifdef __STDC__ double __ieee754_scalb(double x, double fn) #else double __ieee754_scalb(x,fn) double x, fn; #endif #endif { #ifdef _SCALB_INT return scalbn(x,fn); #else if (isnan(x)||isnan(fn)) return x*fn; if (!finite(fn)) { if(fn>0.0) return x*fn; else return x/(-fn); } if (rint(fn)!=fn) return (fn-fn)/(fn-fn); if ( fn > 65000.0) return scalbn(x, 65000); if (-fn > 65000.0) return scalbn(x,-65000); return scalbn(x,(int)fn); #endif }