/* Copyright (C) 2003 Fons Adriaensen This program 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 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <math.h> float exp2ap (float x) { int i; i = (int)(floor (x)); x -= i; // return ldexp (1 + x * (0.66 + 0.34 * x), i); return ldexp (1 + x * (0.6930 + x * (0.2416 + x * (0.0517 + x * 0.0137))), i); }

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