66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/* IEEE floating point support declarations, for GDB, the GNU Debugger.
|
|
Copyright (C) 1991 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program 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 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#if !defined (IEEE_FLOAT_H)
|
|
#define IEEE_FLOAT_H 1
|
|
|
|
#include "ansidecl.h"
|
|
|
|
/* Parameters for extended float format: */
|
|
|
|
struct ext_format {
|
|
unsigned totalsize; /* Total size of extended number */
|
|
unsigned signbyte; /* Byte number of sign bit */
|
|
unsigned char signmask; /* Mask for sign bit */
|
|
unsigned expbyte_h; /* High byte of exponent */
|
|
unsigned expbyte_l; /* Low byte of exponent */
|
|
unsigned manbyte_h; /* High byte of mantissa */
|
|
unsigned manbyte_l; /* Low byte of mantissa */
|
|
};
|
|
|
|
#define TOTALSIZE ext_format->totalsize
|
|
#define SIGNBYTE ext_format->signbyte
|
|
#define SIGNMASK ext_format->signmask
|
|
#define EXPBYTE_H ext_format->expbyte_h
|
|
#define EXPBYTE_L ext_format->expbyte_l
|
|
#define MANBYTE_H ext_format->manbyte_h
|
|
#define MANBYTE_L ext_format->manbyte_l
|
|
|
|
/* Actual ext_format structs for various machines are in the *-tdep.c file
|
|
for each machine. */
|
|
|
|
#define EXT_EXP_NAN 0x7FFF /* Exponent value that indicates NaN */
|
|
#define EXT_EXP_BIAS 0x3FFF /* Amount added to "true" exponent for ext */
|
|
#define DBL_EXP_BIAS 0x3FF /* Ditto, for doubles */
|
|
|
|
/* Convert an IEEE extended float to a double.
|
|
FROM is the address of the extended float.
|
|
Store the double in *TO. */
|
|
|
|
extern void
|
|
ieee_extended_to_double PARAMS ((const struct ext_format *, char *, double *));
|
|
|
|
/* The converse: convert the double *FROM to an extended float
|
|
and store where TO points. */
|
|
|
|
extern void
|
|
double_to_ieee_extended PARAMS ((const struct ext_format *, double *, char *));
|
|
|
|
#endif /* defined (IEEE_FLOAT_H) */
|