65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* bignum.h-arbitrary precision integers
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Copyright (C) 1987, 1992 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* $Id$
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*/
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/***********************************************************************\
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* *
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* Arbitrary-precision integer arithmetic. *
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* For speed, we work in groups of bits, even though this *
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* complicates algorithms. *
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* Each group of bits is called a 'littlenum'. *
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* A bunch of littlenums representing a (possibly large) *
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* integer is called a 'bignum'. *
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* Bignums are >= 0. *
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* *
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\***********************************************************************/
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#define LITTLENUM_NUMBER_OF_BITS (16)
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#define LITTLENUM_RADIX (1 << LITTLENUM_NUMBER_OF_BITS)
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#define LITTLENUM_MASK (0xFFFF)
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#define LITTLENUM_SHIFT (1)
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#define CHARS_PER_LITTLENUM (1 << LITTLENUM_SHIFT)
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#ifndef BITS_PER_CHAR
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#define BITS_PER_CHAR (8)
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#endif
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typedef unsigned short LITTLENUM_TYPE;
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/* JF truncated this to get around a problem with GCC */
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#define LOG_TO_BASE_2_OF_10 (3.3219280948873623478703194294893901758651)
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/* WARNING: I haven't checked that the trailing digits are correct! */
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/* lengths are in sizeof(littlenum)s */
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#if __STDC__ == 1
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int bignum_copy(LITTLENUM_TYPE *in, int in_length,
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LITTLENUM_TYPE *out, int out_length);
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#else
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int bignum_copy();
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#endif /* __STDC__ */
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/* end of bignum.h */
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