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1 | /* Copyright (C) 1997-2024 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
16 | <https://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #ifndef _FENV_H | |
19 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
20 | #endif | |
21 | ||
22 | ||
23 | /* Here should be the exception be defined: | |
24 | FE_INVALID | |
25 | FE_DIVBYZERO | |
26 | FE_OVERFLOW | |
27 | FE_UNDERFLOW | |
28 | FE_INEXACT | |
29 | We define no macro which signals no exception is supported. */ | |
30 | ||
31 | #define FE_ALL_EXCEPT 0 | |
32 | ||
33 | ||
34 | /* Here should the rounding modes be defined: | |
35 | FE_TONEAREST | |
36 | FE_DOWNWARD | |
37 | FE_UPWARD | |
38 | FE_TOWARDZERO | |
39 | We define no macro which signals no rounding mode is selectable. */ | |
40 | ||
41 | ||
42 | /* Type representing exception flags. */ | |
43 | typedef unsigned int fexcept_t; | |
44 | ||
45 | ||
46 | /* Type representing floating-point environment. */ | |
47 | typedef struct | |
48 | { | |
49 | fexcept_t __excepts; | |
50 | /* XXX I don't know what else we should save. */ | |
51 | } | |
52 | fenv_t; | |
53 | ||
54 | /* If the default argument is used we use this value. */ | |
55 | #define FE_DFL_ENV ((const fenv_t *) -1l) | |
56 | ||
57 | #if __GLIBC_USE (IEC_60559_BFP_EXT_C23) | |
58 | /* Type representing floating-point control modes. */ | |
59 | typedef unsigned int femode_t; | |
60 | ||
61 | /* Default floating-point control modes. */ | |
62 | # define FE_DFL_MODE ((const femode_t *) -1L) | |
63 | #endif |