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d16aafd8 AC |
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. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. */ | |
22 | ||
23 | #ifndef DOUBLEST_H | |
24 | #define DOUBLEST_H | |
25 | ||
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 | |
30 | data type. */ | |
31 | ||
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. */ | |
35 | ||
36 | #include "floatformat.h" /* For struct floatformat */ | |
37 | ||
38 | extern const struct floatformat floatformat_unknown; | |
39 | ||
40 | #if HOST_BYTE_ORDER == BIG_ENDIAN | |
41 | #ifndef HOST_FLOAT_FORMAT | |
42 | #define HOST_FLOAT_FORMAT &floatformat_ieee_single_big | |
43 | #endif | |
44 | #ifndef HOST_DOUBLE_FORMAT | |
45 | #define HOST_DOUBLE_FORMAT &floatformat_ieee_double_big | |
46 | #endif | |
47 | #else /* LITTLE_ENDIAN */ | |
48 | #ifndef HOST_FLOAT_FORMAT | |
49 | #define HOST_FLOAT_FORMAT &floatformat_ieee_single_little | |
50 | #endif | |
51 | #ifndef HOST_DOUBLE_FORMAT | |
52 | #define HOST_DOUBLE_FORMAT &floatformat_ieee_double_little | |
53 | #endif | |
54 | #endif | |
55 | ||
56 | #ifndef HOST_LONG_DOUBLE_FORMAT | |
57 | #define HOST_LONG_DOUBLE_FORMAT &floatformat_unknown | |
58 | #endif | |
59 | ||
60 | /* Use `long double' if the host compiler supports it. (Note that this is not | |
61 | necessarily any longer than `double'. On SunOS/gcc, it's the same as | |
62 | double.) This is necessary because GDB internally converts all floating | |
63 | point values to the widest type supported by the host. | |
64 | ||
65 | There are problems however, when the target `long double' is longer than the | |
66 | host's `long double'. In general, we'll probably reduce the precision of | |
67 | any such values and print a warning. */ | |
68 | ||
69 | #ifdef HAVE_LONG_DOUBLE | |
70 | typedef long double DOUBLEST; | |
71 | #else | |
72 | typedef double DOUBLEST; | |
73 | #endif | |
74 | ||
75 | extern void floatformat_to_doublest (const struct floatformat *, | |
64f6fcad | 76 | const void *in, DOUBLEST *out); |
d16aafd8 | 77 | extern void floatformat_from_doublest (const struct floatformat *, |
64f6fcad | 78 | const DOUBLEST *in, void *out); |
d16aafd8 AC |
79 | |
80 | extern int floatformat_is_negative (const struct floatformat *, char *); | |
81 | extern int floatformat_is_nan (const struct floatformat *, char *); | |
82 | extern char *floatformat_mantissa (const struct floatformat *, char *); | |
83 | ||
64f6fcad | 84 | extern DOUBLEST extract_floating (const void *in, int); |
d16aafd8 AC |
85 | extern void store_floating (void *, int, DOUBLEST); |
86 | ||
87 | #endif |