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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libm/] [mathfp/] [e_scalb.c] - Rev 214
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/* @(#)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. * ==================================================== */ /* * __ieee754_scalb(x, fn) is provide for * passing various standard test suite. One * should use scalbn() instead. */ #include "fdlibm.h" #ifndef _DOUBLE_IS_32BITS #ifdef _SCALB_INT #ifdef __STDC__ double scalb(double x, int fn) #else double scalb(x,fn) double x; int fn; #endif #else #ifdef __STDC__ double scalb(double x, double fn) #else double 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 } #endif /* defined(_DOUBLE_IS_32BITS) */
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