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Qucs-core
0.0.19
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00001 /* 00002 * precision.h - global precision header file 00003 * 00004 * Copyright (C) 2005, 2006 Stefan Jahn <stefan@lkcc.org> 00005 * 00006 * This is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2, or (at your option) 00009 * any later version. 00010 * 00011 * This software is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this package; see the file COPYING. If not, write to 00018 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 00019 * Boston, MA 02110-1301, USA. 00020 * 00021 * $Id$ 00022 * 00023 */ 00024 00025 #ifndef __PRECISION_H__ 00026 #define __PRECISION_H__ 00027 00028 #include <limits> 00029 00030 00031 #if NR_DOUBLE_SIZE == 4 /* S 23bit MAN | S 7bit EXP */ 00032 /* single precision */ 00033 #define NR_TINY 1e-6 00034 00035 #elif NR_DOUBLE_SIZE == 8 /* S 52bit MAN | S 10bit EXP */ 00036 /* double precision */ 00037 #define NR_TINY 1e-12 00038 00039 #elif NR_DOUBLE_SIZE == 12 /* S 63bit MAN | S 14bit EXP */ 00040 /* IEEE 80-bit floating point */ 00041 #define NR_TINY 1e-15 00042 00043 #elif NR_DOUBLE_SIZE == 16 /* S 112bit MAN | S 14bit EXP */ 00044 /* IEEE 128-bit floating point */ 00045 #define NR_TINY 1e-15 00046 #endif 00047 00048 00049 00050 #endif /* __PRECISION_H__ */
1.7.6.1