1 /* Floating point definitions for GDB.
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation,
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
29 /* Setup definitions for host and target floating point formats. We need to
30 consider the format for `float', `double', and `long double' for both target
31 and host. We need to do this so that we know what kind of conversions need
32 to be done when converting target numbers to and from the hosts DOUBLEST
35 /* This is used to indicate that we don't know the format of the floating point
36 number. Typically, this is useful for native ports, where the actual format
37 is irrelevant, since no conversions will be taking place. */
39 #include "floatformat.h" /* For struct floatformat */
41 /* Use `long double' if the host compiler supports it. (Note that this is not
42 necessarily any longer than `double'. On SunOS/gcc, it's the same as
43 double.) This is necessary because GDB internally converts all floating
44 point values to the widest type supported by the host.
46 There are problems however, when the target `long double' is longer than the
47 host's `long double'. In general, we'll probably reduce the precision of
48 any such values and print a warning. */
50 #ifdef HAVE_LONG_DOUBLE
51 typedef long double DOUBLEST
;
53 typedef double DOUBLEST
;
56 extern void floatformat_to_doublest (const struct floatformat
*,
57 const void *in
, DOUBLEST
*out
);
58 extern void floatformat_from_doublest (const struct floatformat
*,
59 const DOUBLEST
*in
, void *out
);
61 extern int floatformat_is_negative (const struct floatformat
*, char *);
62 extern int floatformat_is_nan (const struct floatformat
*, char *);
63 extern char *floatformat_mantissa (const struct floatformat
*, char *);
65 /* These functions have been replaced by extract_typed_floating and
68 Most calls are passing in TYPE_LENGTH (TYPE) so can be changed to
69 just pass the TYPE. The remainder pass in the length of a
70 register, those calls should instead pass in the floating point
71 type that corresponds to that length. */
73 extern DOUBLEST
deprecated_extract_floating (const void *addr
, int len
);
74 extern void deprecated_store_floating (void *addr
, int len
, DOUBLEST val
);
76 /* Given TYPE, return its floatformat. TYPE_FLOATFORMAT() may return
77 NULL. type_floatformat() detects that and returns a floatformat
78 based on the type size when FLOATFORMAT is NULL. */
80 const struct floatformat
*floatformat_from_type (const struct type
*type
);
82 extern DOUBLEST
extract_typed_floating (const void *addr
,
83 const struct type
*type
);
84 extern void store_typed_floating (void *addr
, const struct type
*type
,
86 extern void convert_typed_floating (const void *from
,
87 const struct type
*from_type
,
88 void *to
, const struct type
*to_type
);
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