| |
| /* |
| * IBM Accurate Mathematical Library |
| * Written by International Business Machines Corp. |
| * Copyright (C) 2001 Free Software Foundation, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published by |
| * the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /************************************************************************/ |
| /* MODULE_NAME: mpa.h */ |
| /* */ |
| /* FUNCTIONS: */ |
| /* mcr */ |
| /* acr */ |
| /* cr */ |
| /* cpy */ |
| /* cpymn */ |
| /* mp_dbl */ |
| /* dbl_mp */ |
| /* add */ |
| /* sub */ |
| /* mul */ |
| /* inv */ |
| /* dvd */ |
| /* */ |
| /* Arithmetic functions for multiple precision numbers. */ |
| /* Common types and definition */ |
| /************************************************************************/ |
| |
| |
| typedef struct {/* This structure holds the details of a multi-precision */ |
| int e; /* floating point number, x: d[0] holds its sign (-1,0 or 1) */ |
| double d[40]; /* e holds its exponent (...,-2,-1,0,1,2,...) and */ |
| } mp_no; /* d[1]...d[p] hold its mantissa digits. The value of x is, */ |
| /* x = d[1]*r**(e-1) + d[2]*r**(e-2) + ... + d[p]*r**(e-p). */ |
| /* Here r = 2**24, 0 <= d[i] < r and 1 <= p <= 32. */ |
| /* p is a global variable. A multi-precision number is */ |
| /* always normalized. Namely, d[1] > 0. An exception is */ |
| /* a zero which is characterized by d[0] = 0. The terms */ |
| /* d[p+1], d[p+2], ... of a none zero number have no */ |
| /* significance and so are the terms e, d[1],d[2],... */ |
| /* of a zero. */ |
| |
| typedef union { int i[2]; double d; } number; |
| |
| #define X x->d |
| #define Y y->d |
| #define Z z->d |
| #define EX x->e |
| #define EY y->e |
| #define EZ z->e |
| |
| #define ABS(x) ((x) < 0 ? -(x) : (x)) |
| |
| int __acr(const mp_no *, const mp_no *, int); |
| int __cr(const mp_no *, const mp_no *, int); |
| void __cpy(const mp_no *, mp_no *, int); |
| void __cpymn(const mp_no *, int, mp_no *, int); |
| void __mp_dbl(const mp_no *, double *, int); |
| void __dbl_mp(double, mp_no *, int); |
| void __add(const mp_no *, const mp_no *, mp_no *, int); |
| void __sub(const mp_no *, const mp_no *, mp_no *, int); |
| void __mul(const mp_no *, const mp_no *, mp_no *, int); |
| void __inv(const mp_no *, mp_no *, int); |
| void __dvd(const mp_no *, const mp_no *, mp_no *, int); |
| |
| extern void __mpatan (mp_no *, mp_no *, int); |
| extern void __mpatan2 (mp_no *, mp_no *, mp_no *, int); |
| extern void __mpsqrt (mp_no *, mp_no *, int); |
| extern void __mpexp (mp_no *, mp_no *__y, int); |
| extern void __c32 (mp_no *, mp_no *, mp_no *, int); |
| extern int __mpranred (double, mp_no *, int); |