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d16aafd8 | 1 | /* Floating point definitions for GDB. |
f1908289 | 2 | |
61baf725 | 3 | Copyright (C) 1986-2017 Free Software Foundation, Inc. |
d16aafd8 AC |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
d16aafd8 AC |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d16aafd8 AC |
19 | |
20 | #ifndef DOUBLEST_H | |
21 | #define DOUBLEST_H | |
22 | ||
da3331ec | 23 | struct type; |
5ef2d0aa | 24 | struct floatformat; |
da3331ec | 25 | |
d16aafd8 AC |
26 | /* Use `long double' if the host compiler supports it. (Note that this is not |
27 | necessarily any longer than `double'. On SunOS/gcc, it's the same as | |
28 | double.) This is necessary because GDB internally converts all floating | |
29 | point values to the widest type supported by the host. | |
30 | ||
31 | There are problems however, when the target `long double' is longer than the | |
32 | host's `long double'. In general, we'll probably reduce the precision of | |
33 | any such values and print a warning. */ | |
34 | ||
a6205f53 DJ |
35 | #if (defined HAVE_LONG_DOUBLE && defined PRINTF_HAS_LONG_DOUBLE \ |
36 | && defined SCANF_HAS_LONG_DOUBLE) | |
d16aafd8 | 37 | typedef long double DOUBLEST; |
689e4e2d TJB |
38 | # define DOUBLEST_PRINT_FORMAT "Lg" |
39 | # define DOUBLEST_SCAN_FORMAT "Lg" | |
d16aafd8 AC |
40 | #else |
41 | typedef double DOUBLEST; | |
689e4e2d TJB |
42 | # define DOUBLEST_PRINT_FORMAT "g" |
43 | # define DOUBLEST_SCAN_FORMAT "lg" | |
96c1eda2 AO |
44 | /* If we can't scan or print long double, we don't want to use it |
45 | anywhere. */ | |
46 | # undef HAVE_LONG_DOUBLE | |
a6205f53 DJ |
47 | # undef PRINTF_HAS_LONG_DOUBLE |
48 | # undef SCANF_HAS_LONG_DOUBLE | |
d16aafd8 AC |
49 | #endif |
50 | ||
20389057 DJ |
51 | /* Different kinds of floatformat numbers recognized by |
52 | floatformat_classify. To avoid portability issues, we use local | |
53 | values instead of the C99 macros (FP_NAN et cetera). */ | |
54 | enum float_kind { | |
55 | float_nan, | |
56 | float_infinite, | |
57 | float_zero, | |
58 | float_normal, | |
59 | float_subnormal | |
60 | }; | |
61 | ||
d16aafd8 | 62 | extern void floatformat_to_doublest (const struct floatformat *, |
64f6fcad | 63 | const void *in, DOUBLEST *out); |
d16aafd8 | 64 | extern void floatformat_from_doublest (const struct floatformat *, |
64f6fcad | 65 | const DOUBLEST *in, void *out); |
d16aafd8 | 66 | |
108d6ead AC |
67 | extern int floatformat_is_negative (const struct floatformat *, |
68 | const bfd_byte *); | |
20389057 DJ |
69 | extern enum float_kind floatformat_classify (const struct floatformat *, |
70 | const bfd_byte *); | |
108d6ead AC |
71 | extern const char *floatformat_mantissa (const struct floatformat *, |
72 | const bfd_byte *); | |
d16aafd8 | 73 | |
b79497cb PA |
74 | /* Return the floatformat's total size in host bytes. */ |
75 | ||
76 | extern size_t floatformat_totalsize_bytes (const struct floatformat *fmt); | |
77 | ||
96d2f608 AC |
78 | extern DOUBLEST extract_typed_floating (const void *addr, |
79 | const struct type *type); | |
80 | extern void store_typed_floating (void *addr, const struct type *type, | |
81 | DOUBLEST val); | |
43686d64 MK |
82 | extern void convert_typed_floating (const void *from, |
83 | const struct type *from_type, | |
84 | void *to, const struct type *to_type); | |
d16aafd8 AC |
85 | |
86 | #endif |