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/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
/*
$Log: flpttypes.h,v $
* Revision 1.1.1.1 1998/01/17 15:56:02 release
* First version to be checked into rolling release.
*
* Revision 1.2 1995/12/18 13:11:18 wfs
* Put hppatrans uder cvs control. Major Changes made since last release
* include:
* (i) PIC code generation.
* (ii) Profiling.
* (iii) Dynamic Initialization.
* (iv) Debugging of Exception Handling and Diagnostics.
*
* Revision 5.0 1995/08/25 13:42:58 wfs
* Preperation for August 25 Glue release
*
* Revision 3.4 1995/08/25 11:12:16 wfs
* *** empty log message ***
*
* Revision 3.4 1995/08/25 11:12:16 wfs
* *** empty log message ***
*
* Revision 3.1 95/04/10 16:26:24 16:26:24 wfs (William Simmonds)
* Apr95 tape version.
*
* Revision 3.0 95/03/30 11:17:05 11:17:05 wfs (William Simmonds)
* Mar95 tape version with CRCR95_178 bug fix.
*
* Revision 2.0 95/03/15 15:26:51 15:26:51 wfs (William Simmonds)
* spec 3.1 changes implemented, tests outstanding.
*
* Revision 1.1 95/01/11 13:38:04 13:38:04 wfs (William Simmonds)
* Initial revision
*
*/
/*******************************************************************
flpttypes.h
Defines types for the internal floating point representation.
******************************************************************/
#ifndef flpttypekey
#define flpttypekey 1
#include <limits.h>
#include "fbase.h"
#if FBASE == 10
/* FBASE 10 is obsolete */
# define MANT_SIZE 40
#define Fdig unsigned char
# define FNUM_SIZE 65 /* max size required by flt2str */
/* MANT_SIZE + 1(sign) + 1(point) + 2(E+sign) + log(MAX_LONG) + 1(null) */
#define E_MIN (-1000000) /* (LONG_MIN/10) doesnt work on 80386 cc
*/
#define E_MAX (LONG_MAX/10)
/* Function status values: */
# define OKAY 0
# define EXP2BIG (-1)
# define SYNTAX (-2)
# define DIVBY0 (-3)
/* Rounding types: */
# define R2ZERO 0
# define R2PINF 1
# define R2NINF 2
# define R2NEAR 3
typedef struct _flt {
Fdig mant[MANT_SIZE];
/* mantissa digit values [0-9] (NOT '0' to
'9') */
/* point is between 1st and 2nd digits */
int sign; /* -1: negative; +1: positive; 0: value is
zero */
int exp; /* signed exponent; in range E_MIN..E_MAX
*/
} flt; /* floating point representation */
#else
/* all installers should use this definition */
#ifndef MANT_SIZE
#define MANT_SIZE 8
#endif
/* MANT_SIZE is the number of mantissa array elements */
#define Fdig unsigned short
#define FBITS 16
/* FBITS is the number of bits in one array element */
#define E_MIN (-16384)
#define E_MAX (LONG_MAX/FBASE)
/* Function status values: */
# define OKAY 0
# define EXP2BIG (-1)
# define SYNTAX (-2)
# define DIVBY0 (-3)
/* Rounding types: */
# define R2ZERO 3
# define R2PINF 2
# define R2NINF 1
# define R2NEAR 0
typedef struct _flt {
Fdig mant[MANT_SIZE];
/* point is between 1st and 2nd digits */
int sign; /* -1: negative; +1: positive; 0: value is
zero */
int exp; /* signed exponent; in range E_MIN..E_MAX
*/
} flt; /* floating point representation */
/* type for result of conversion of reals to ints */
typedef struct r2l_t {
int i1; /* least significant */
int i2;
int i3;
int i4; /* most significant */
} r2l;
#endif
typedef struct flt64_t {
int big; /* more significant 32 bits */
unsigned int small; /* less significant 32 bits */
} flt64;
/* used to convert flpt number which are integers into a
64 bit representation */
#endif