mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/* bignum.h-arbitrary precision integers
|
|
Copyright 1987, 1992, 2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GAS is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GAS; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/***********************************************************************\
|
|
* *
|
|
* Arbitrary-precision integer arithmetic. *
|
|
* For speed, we work in groups of bits, even though this *
|
|
* complicates algorithms. *
|
|
* Each group of bits is called a 'littlenum'. *
|
|
* A bunch of littlenums representing a (possibly large) *
|
|
* integer is called a 'bignum'. *
|
|
* Bignums are >= 0. *
|
|
* *
|
|
\***********************************************************************/
|
|
|
|
#define LITTLENUM_NUMBER_OF_BITS (16)
|
|
#define LITTLENUM_RADIX (1 << LITTLENUM_NUMBER_OF_BITS)
|
|
#define LITTLENUM_MASK (0xFFFF)
|
|
#define LITTLENUM_SHIFT (1)
|
|
#define CHARS_PER_LITTLENUM (1 << LITTLENUM_SHIFT)
|
|
#ifndef BITS_PER_CHAR
|
|
#define BITS_PER_CHAR (8)
|
|
#endif
|
|
|
|
typedef unsigned short LITTLENUM_TYPE;
|
|
|
|
/* JF truncated this to get around a problem with GCC */
|
|
#define LOG_TO_BASE_2_OF_10 (3.3219280948873623478703194294893901758651)
|
|
/* WARNING: I haven't checked that the trailing digits are correct! */
|
|
|
|
/* lengths are in sizeof(littlenum)s */
|
|
|
|
int bignum_copy (LITTLENUM_TYPE * in, int in_length,
|
|
LITTLENUM_TYPE * out, int out_length);
|
|
|
|
/* end of bignum.h */
|