]>
Commit | Line | Data |
---|---|---|
d5efd131 MF |
1 | /* Copyright (C) 1999, 2000 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 | |
75efb018 MF |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
d5efd131 MF |
17 | |
18 | #ifndef _FENV_H | |
19 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
20 | #endif | |
21 | ||
22 | ||
23 | /* Define bits representing the exception. We use the bit positions of | |
24 | the appropriate bits in the FPSR... (Tahoe EAS 2.4 5-4)*/ | |
25 | ||
26 | enum | |
27 | { | |
28 | FE_INEXACT = 1UL << 5, | |
29 | #define FE_INEXACT FE_INEXACT | |
30 | ||
31 | FE_UNDERFLOW = 1UL << 4, | |
32 | #define FE_UNDERFLOW FE_UNDERFLOW | |
33 | ||
34 | FE_OVERFLOW = 1UL << 3, | |
35 | #define FE_OVERFLOW FE_OVERFLOW | |
36 | ||
37 | FE_DIVBYZERO = 1UL << 2, | |
38 | #define FE_DIVBYZERO FE_DIVBYZERO | |
39 | ||
40 | FE_UNNORMAL = 1UL << 1, | |
41 | #define FE_UNNORMAL FE_UNNORMAL | |
42 | ||
43 | FE_INVALID = 1UL << 0, | |
44 | #define FE_INVALID FE_INVALID | |
45 | ||
46 | FE_ALL_EXCEPT = | |
47 | (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID) | |
48 | #define FE_ALL_EXCEPT FE_ALL_EXCEPT | |
49 | }; | |
50 | ||
51 | ||
52 | enum | |
53 | { | |
54 | FE_TOWARDZERO = 3, | |
55 | #define FE_TOWARDZERO FE_TOWARDZERO | |
56 | ||
57 | FE_UPWARD = 2, | |
58 | #define FE_UPWARD FE_UPWARD | |
59 | ||
60 | FE_DOWNWARD = 1, | |
61 | #define FE_DOWNWARD FE_DOWNWARD | |
62 | ||
63 | FE_TONEAREST = 0, | |
64 | #define FE_TONEAREST FE_TONEAREST | |
65 | }; | |
66 | ||
67 | ||
68 | /* Type representing exception flags. */ | |
69 | typedef unsigned long int fexcept_t; | |
70 | ||
71 | /* Type representing floating-point environment. */ | |
72 | typedef unsigned long int fenv_t; | |
73 | ||
74 | /* If the default argument is used we use this value. */ | |
75 | #define FE_DFL_ENV ((__const fenv_t *) 0xc009804c0270033fUL) | |
76 | ||
77 | #ifdef __USE_GNU | |
78 | /* Floating-point environment where only FE_UNNORMAL is masked since this | |
79 | exception is not generally supported by glibc. */ | |
80 | # define FE_NOMASK_ENV ((__const fenv_t *) 0xc009804c02700302UL) | |
81 | ||
82 | /* Floating-point environment with (processor-dependent) non-IEEE | |
83 | floating point. In this case, turning on flush-to-zero mode for | |
84 | s0, s2, and s3. */ | |
85 | # define FE_NONIEEE_ENV ((__const fenv_t *) 0xc009a04d0270037fUL) | |
86 | #endif |