[thirdparty/glibc.git] / sysdeps / ieee754 / dbl-64 / mpa.h

/*
 * IBM Accurate Mathematical Library
 * Written by International Business Machines Corp.
 * Copyright (C) 2001-2013 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, see <http://www.gnu.org/licenses/>.
 */

/************************************************************************/
/*  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;

extern const mp_no mpone;
extern const mp_no mptwo;

#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 *, int);
extern void __c32 (mp_no *, mp_no *, mp_no *, int);
extern int __mpranred (double, mp_no *, int);
Commit	Line	Data
e4d82761 UD	1	/*
e4d82761 UD	2	* IBM Accurate Mathematical Library
c6c6dd48	3	* Written by International Business Machines Corp.
568035b7	4	* Copyright (C) 2001-2013 Free Software Foundation, Inc.
e4d82761 UD	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU Lesser General Public License as published by
cc7375ce	8	* the Free Software Foundation; either version 2.1 of the License, or
e4d82761	9	* (at your option) any later version.
50944bca	10	*
e4d82761 UD	11	* This program 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
c6c6dd48	14	* GNU Lesser General Public License for more details.
e4d82761 UD	15	*
e4d82761 UD	16	* You should have received a copy of the GNU Lesser General Public License
59ba27a6	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
e4d82761	18	*/
c6c6dd48	19
e4d82761 UD	20	/************************************************************************/
	21	/* MODULE_NAME: mpa.h */
	22	/* */
	23	/* FUNCTIONS: */
	24	/* mcr */
	25	/* acr */
	26	/* cr */
	27	/* cpy */
	28	/* cpymn */
	29	/* mp_dbl */
	30	/* dbl_mp */
	31	/* add */
	32	/* sub */
	33	/* mul */
	34	/* inv */
	35	/* dvd */
	36	/* */
	37	/* Arithmetic functions for multiple precision numbers. */
	38	/* Common types and definition */
	39	/************************************************************************/
	40
	41
	42	typedef struct {/* This structure holds the details of a multi-precision */
	43	int e; /* floating point number, x: d[0] holds its sign (-1,0 or 1) */
	44	double d[40]; /* e holds its exponent (...,-2,-1,0,1,2,...) and */
	45	} mp_no; /* d[1]...d[p] hold its mantissa digits. The value of x is, */
af968f62 UD	46	/* x = d[1]r(e-1) + d[2]r*(e-2) + ... + d[p]r*(e-p). /
	47	/* Here r = 2*24, 0 <= d[i] < r and 1 <= p <= 32. /
	48	/* p is a global variable. A multi-precision number is */
	49	/* always normalized. Namely, d[1] > 0. An exception is */
	50	/* a zero which is characterized by d[0] = 0. The terms */
	51	/* d[p+1], d[p+2], ... of a none zero number have no */
	52	/* significance and so are the terms e, d[1],d[2],... */
	53	/* of a zero. */
e4d82761 UD	54
	55	typedef union { int i[2]; double d; } number;
	56
b76eb5f0	57	extern const mp_no mpone;
da08f647	58	extern const mp_no mptwo;
b76eb5f0	59
e4d82761 UD	60	#define X x->d
	61	#define Y y->d
	62	#define Z z->d
	63	#define EX x->e
	64	#define EY y->e
	65	#define EZ z->e
	66
e4d82761 UD	67	#define ABS(x) ((x) < 0 ? -(x) : (x))
e4d82761 UD	68
31d3cc00	69	int __acr(const mp_no , const mp_no , int);
af968f62	70	// int __cr(const mp_no , const mp_no , int);
ca58f1db	71	void __cpy(const mp_no , mp_no , int);
af968f62	72	// void __cpymn(const mp_no , int, mp_no , int);
50944bca	73	void __mp_dbl(const mp_no , double , int);
ca58f1db UD	74	void __dbl_mp(double, mp_no *, int);
	75	void __add(const mp_no , const mp_no , mp_no *, int);
	76	void __sub(const mp_no , const mp_no , mp_no *, int);
	77	void __mul(const mp_no , const mp_no , mp_no *, int);
af968f62	78	// void __inv(const mp_no , mp_no , int);
ca58f1db	79	void __dvd(const mp_no , const mp_no , mp_no *, int);
1d052247 AJ	80
	81	extern void __mpatan (mp_no , mp_no , int);
	82	extern void __mpatan2 (mp_no , mp_no , mp_no *, int);
	83	extern void __mpsqrt (mp_no , mp_no , int);
302913e1	84	extern void __mpexp (mp_no , mp_no , int);
1d052247 AJ	85	extern void __c32 (mp_no , mp_no , mp_no *, int);
1d052247 AJ	86	extern int __mpranred (double, mp_no *, int);