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
23 /* Parameters for extended float format: */
26 unsigned totalsize; /* Total size of extended number */
27 unsigned signbyte; /* Byte number of sign bit */
28 unsigned char signmask; /* Mask for sign bit */
29 unsigned expbyte_h; /* High byte of exponent */
30 unsigned expbyte_l; /* Low byte of exponent */
31 unsigned manbyte_h; /* High byte of mantissa */
32 unsigned manbyte_l; /* Low byte of mantissa */
35 #define TOTALSIZE ext_format->totalsize
36 #define SIGNBYTE ext_format->signbyte
37 #define SIGNMASK ext_format->signmask
38 #define EXPBYTE_H ext_format->expbyte_h
39 #define EXPBYTE_L ext_format->expbyte_l
40 #define MANBYTE_H ext_format->manbyte_h
41 #define MANBYTE_L ext_format->manbyte_l
43 /* Actual ext_format structs for various machines are in the *-tdep.c file
46 #define EXT_EXP_NAN 0x7FFF /* Exponent value that indicates NaN */
47 #define EXT_EXP_BIAS 0x3FFF /* Amount added to "true" exponent for ext */
48 #define DBL_EXP_BIAS 0x3FF /* Ditto, for doubles */
50 /* Convert an IEEE extended float to a double.
51 FROM is the address of the extended float.
52 Store the double in *TO. */
55 ieee_extended_to_double PARAMS ((const struct ext_format *, char *, double *));
57 /* The converse: convert the double *FROM to an extended float
58 and store where TO points. */
61 double_to_ieee_extended PARAMS ((const struct ext_format *, double *, char *));
63 #endif /* defined (IEEE_FLOAT_H) */