1 /* Floating point definitions for GDB.
2 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
26 /* Setup definitions for host and target floating point formats. We need to
27 consider the format for `float', `double', and `long double' for both target
28 and host. We need to do this so that we know what kind of conversions need
29 to be done when converting target numbers to and from the hosts DOUBLEST
32 /* This is used to indicate that we don't know the format of the floating point
33 number. Typically, this is useful for native ports, where the actual format
34 is irrelevant, since no conversions will be taking place. */
36 #include "floatformat.h" /* For struct floatformat */
38 extern const struct floatformat floatformat_unknown;
40 /* Use `long double' if the host compiler supports it. (Note that this is not
41 necessarily any longer than `double'. On SunOS/gcc, it's the same as
42 double.) This is necessary because GDB internally converts all floating
43 point values to the widest type supported by the host.
45 There are problems however, when the target `long double' is longer than the
46 host's `long double'. In general, we'll probably reduce the precision of
47 any such values and print a warning. */
49 #ifdef HAVE_LONG_DOUBLE
50 typedef long double DOUBLEST;
52 typedef double DOUBLEST;
55 extern void floatformat_to_doublest (const struct floatformat *,
56 const void *in, DOUBLEST *out);
57 extern void floatformat_from_doublest (const struct floatformat *,
58 const DOUBLEST *in, void *out);
60 extern int floatformat_is_negative (const struct floatformat *, char *);
61 extern int floatformat_is_nan (const struct floatformat *, char *);
62 extern char *floatformat_mantissa (const struct floatformat *, char *);
64 /* These two functions are deprecated in favour of
65 extract_typed_floating and store_typed_floating. See comments in
66 'doublest.c' for details. */
68 extern DOUBLEST extract_floating (const void *addr, int len);
69 extern void store_floating (void *addr, int len, DOUBLEST val);
71 extern DOUBLEST extract_typed_floating (const void *addr,
72 const struct type *type);
73 extern void store_typed_floating (void *addr, const struct type *type,
75 extern void convert_typed_floating (const void *from,
76 const struct type *from_type,
77 void *to, const struct type *to_type);