1 /* bignum.h-arbitrary precision integers
2 Copyright 1987, 1992 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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 2, or (at your option)
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.
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /***********************************************************************\
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'. *
30 \***********************************************************************/
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)
38 #define BITS_PER_CHAR (8)
41 typedef unsigned short LITTLENUM_TYPE
;
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! */
47 /* lengths are in sizeof(littlenum)s */
49 int bignum_copy
PARAMS ((LITTLENUM_TYPE
* in
, int in_length
,
50 LITTLENUM_TYPE
* out
, int out_length
));
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