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- /* 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) */
-