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//=========================================================================== // // e_scalb.c // // Part of the standard mathematical function library // //=========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later // version. // // eCos is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License // along with eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //=========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): jlarmour // Contributors: jlarmour // Date: 1998-02-13 // Purpose: // Description: // Usage: // //####DESCRIPTIONEND#### // //=========================================================================== // CONFIGURATION #include <pkgconf/libm.h> // Configuration header // Include the Math library? #ifdef CYGPKG_LIBM // Derived from code with the following copyright /* @(#)e_scalb.c 1.3 95/01/18 */ /* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunSoft, 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 "mathincl/fdlibm.h" #ifdef CYGFUN_LIBM_SVID3_scalb double __ieee754_scalb(double x, double fn) #else double __ieee754_scalb(double x, int fn) #endif { #ifdef CYGFUN_LIBM_SVID3_scalb 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); #else return scalbn(x,fn); #endif } #endif // ifdef CYGPKG_LIBM // EOF e_scalb.c