1
2/*
3 * IBM Accurate Mathematical Library
4 * Written by International Business Machines Corp.
5 * Copyright (C) 2001 Free Software Foundation, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published by
9 * the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22/************************************************************************/
23/*  MODULE_NAME: mpa.h                                                  */
24/*                                                                      */
25/*  FUNCTIONS:                                                          */
26/*               mcr                                                    */
27/*               acr                                                    */
28/*               cr                                                     */
29/*               cpy                                                    */
30/*               cpymn                                                  */
31/*               mp_dbl                                                 */
32/*               dbl_mp                                                 */
33/*               add                                                    */
34/*               sub                                                    */
35/*               mul                                                    */
36/*               inv                                                    */
37/*               dvd                                                    */
38/*                                                                      */
39/* Arithmetic functions for multiple precision numbers.                 */
40/* Common types and definition                                          */
41/************************************************************************/
42
43
44typedef struct {/* This structure holds the details of a multi-precision     */
45  int e;        /* floating point number, x: d[0] holds its sign (-1,0 or 1) */
46  double d[40]; /* e holds its exponent (...,-2,-1,0,1,2,...) and            */
47} mp_no;        /* d[1]...d[p] hold its mantissa digits. The value of x is,  */
48                /* x = d[1]*r**(e-1) + d[2]*r**(e-2) + ... + d[p]*r**(e-p).  */
49                /* Here   r = 2**24,   0 <= d[i] < r  and  1 <= p <= 32.     */
50                /* p is a global variable. A multi-precision number is       */
51                /* always normalized. Namely, d[1] > 0. An exception is      */
52                /* a zero which is characterized by d[0] = 0. The terms      */
53                /* d[p+1], d[p+2], ... of a none zero number have no         */
54                /* significance and so are the terms e, d[1],d[2],...        */
55                /* of a zero.                                                */
56
57typedef union { int i[2]; double d; } number;
58
59#define  X   x->d
60#define  Y   y->d
61#define  Z   z->d
62#define  EX  x->e
63#define  EY  y->e
64#define  EZ  z->e
65
66#define MAX(x,y) ((x) < (y) ?  (y) : (x))
67#define MIN(x,y) ((x) < (y) ?  (x) : (y))
68#define ABS(x)   ((x) <  0  ? -(x) : (x))
69
70int __acr(const mp_no *, const mp_no *, int);
71int  __cr(const mp_no *, const mp_no *, int);
72void __cpy(const mp_no *, mp_no *, int);
73void __cpymn(const mp_no *, int, mp_no *, int);
74void __mp_dbl(const mp_no *, double *, int);
75void __dbl_mp(double, mp_no *, int);
76void __add(const mp_no *, const mp_no *, mp_no *, int);
77void __sub(const mp_no *, const mp_no *, mp_no *, int);
78void __mul(const mp_no *, const mp_no *, mp_no *, int);
79void __inv(const mp_no *, mp_no *, int);
80void __dvd(const mp_no *, const mp_no *, mp_no *, int);
81
82extern void __mpatan (mp_no *, mp_no *, int);
83extern void __mpatan2 (mp_no *, mp_no *, mp_no *, int);
84extern void __mpsqrt (mp_no *, mp_no *, int);
85extern void __mpexp (mp_no *, mp_no *__y, int);
86extern void __c32 (mp_no *, mp_no *, mp_no *, int);
87extern int __mpranred (double, mp_no *, int);
88