gas/bignum.h

   1 /* bignum.h-arbitrary precision integers
   2    Copyright (C) 1987 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 1, or (at your option)
   9 any later version.
  10
  11 GAS is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /***********************************************************************\
  21 *                                                                       *
  22 *       Arbitrary-precision integer arithmetic.                         *
  23 *       For speed, we work in groups of bits, even though this          *
  24 *       complicates algorithms.                                         *
  25 *       Each group of bits is called a 'littlenum'.                     *
  26 *       A bunch of littlenums representing a (possibly large)           *
  27 *       integer is called a 'bignum'.                                   *
  28 *       Bignums are >= 0.                                               *
  29 *                                                                       *
  30 \***********************************************************************/
  31
  32 #define LITTLENUM_NUMBER_OF_BITS        (16)
  33 #define LITTLENUM_RADIX                 (1 << LITTLENUM_NUMBER_OF_BITS)
  34 #define LITTLENUM_MASK                  (0xFFFF)
  35 #define LITTLENUM_SHIFT                 (1)
  36 #define CHARS_PER_LITTLENUM             (1 << LITTLENUM_SHIFT)
  37 #ifndef BITS_PER_CHAR
  38 #define BITS_PER_CHAR                   (8)
  39 #endif
  40
  41 typedef unsigned short LITTLENUM_TYPE;
  42
  43 /* JF truncated this to get around a problem with GCC */
  44 #define LOG_TO_BASE_2_OF_10             (3.3219280948873623478703194294893901758651 )
  45                                 /* WARNING: I haven't checked that the trailing digits are correct! */
  46
  47 /* end: bignum.h */