1 /* bignum.h-arbitrary precision integers
2    Copyright (C) 1987-2016 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;
43