1 /* IEEE floating point support declarations, for GDB, the GNU Debugger.
2 Copyright (C) 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
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
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 #if !defined (IEEE_FLOAT_H)
21 #define IEEE_FLOAT_H 1
25 /* Parameters for extended float format: */
28 unsigned totalsize
; /* Total size of extended number */
29 unsigned signbyte
; /* Byte number of sign bit */
30 unsigned char signmask
; /* Mask for sign bit */
31 unsigned expbyte_h
; /* High byte of exponent */
32 unsigned expbyte_l
; /* Low byte of exponent */
33 unsigned manbyte_h
; /* High byte of mantissa */
34 unsigned manbyte_l
; /* Low byte of mantissa */
37 #define TOTALSIZE ext_format->totalsize
38 #define SIGNBYTE ext_format->signbyte
39 #define SIGNMASK ext_format->signmask
40 #define EXPBYTE_H ext_format->expbyte_h
41 #define EXPBYTE_L ext_format->expbyte_l
42 #define MANBYTE_H ext_format->manbyte_h
43 #define MANBYTE_L ext_format->manbyte_l
45 /* Actual ext_format structs for various machines are in the *-tdep.c file
48 #define EXT_EXP_NAN 0x7FFF /* Exponent value that indicates NaN */
49 #define EXT_EXP_BIAS 0x3FFF /* Amount added to "true" exponent for ext */
50 #define DBL_EXP_BIAS 0x3FF /* Ditto, for doubles */
52 /* Convert an IEEE extended float to a double.
53 FROM is the address of the extended float.
54 Store the double in *TO. */
57 ieee_extended_to_double
PARAMS ((const struct ext_format
*, char *, double *));
59 /* The converse: convert the double *FROM to an extended float
60 and store where TO points. */
63 double_to_ieee_extended
PARAMS ((const struct ext_format
*, double *, char *));
65 #endif /* defined (IEEE_FLOAT_H) */
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