1  /* bignum.h-arbitrary precision integers
       2     Copyright (C) 1987-2023 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;