/* @(#)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. * ==================================================== */ #if defined(LIBM_SCCS) && !defined(lint) static char rcsid[] = "$NetBSD: e_scalb.c,v 1.6 1995/05/10 20:46:09 jtc 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 double __ieee754_scalb(double x, int fn) { return scalbn(x, fn); } #else double __ieee754_scalb(double x, double fn) { 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