| 1 | /* bignum.h-arbitrary precision integers |
| 2 | Copyright (C) 1987-2018 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, but WITHOUT |
| 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 14 | License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 19 | Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | /***********************************************************************\ |
| 22 | * * |
| 23 | * Arbitrary-precision integer arithmetic. * |
| 24 | * For speed, we work in groups of bits, even though this * |
| 25 | * complicates algorithms. * |
| 26 | * Each group of bits is called a 'littlenum'. * |
| 27 | * A bunch of littlenums representing a (possibly large) * |
| 28 | * integer is called a 'bignum'. * |
| 29 | * Bignums are >= 0. * |
| 30 | * * |
| 31 | \***********************************************************************/ |
| 32 | |
| 33 | #define LITTLENUM_NUMBER_OF_BITS (16) |
| 34 | #define LITTLENUM_RADIX (1 << LITTLENUM_NUMBER_OF_BITS) |
| 35 | #define LITTLENUM_MASK (0xFFFF) |
| 36 | #define LITTLENUM_SHIFT (1) |
| 37 | #define CHARS_PER_LITTLENUM (1 << LITTLENUM_SHIFT) |
| 38 | #ifndef BITS_PER_CHAR |
| 39 | #define BITS_PER_CHAR (8) |
| 40 | #endif |
| 41 | |
| 42 | typedef unsigned short LITTLENUM_TYPE; |