]>
Commit | Line | Data |
---|---|---|
04277e02 | 1 | /* Copyright (C) 2004-2019 Free Software Foundation, Inc. |
554066b8 MS |
2 | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _FENV_H | |
20 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
21 | #endif | |
22 | ||
23 | /* Define bits representing exceptions in the FPSR status word. */ | |
24 | enum | |
25 | { | |
26 | FE_INVALID = | |
27 | #define FE_INVALID 1 | |
28 | FE_INVALID, | |
29 | FE_DIVBYZERO = | |
30 | #define FE_DIVBYZERO 2 | |
31 | FE_DIVBYZERO, | |
32 | FE_OVERFLOW = | |
33 | #define FE_OVERFLOW 4 | |
34 | FE_OVERFLOW, | |
35 | FE_UNDERFLOW = | |
36 | #define FE_UNDERFLOW 8 | |
37 | FE_UNDERFLOW, | |
38 | FE_INEXACT = | |
39 | #define FE_INEXACT 16 | |
40 | FE_INEXACT, | |
41 | }; | |
42 | ||
43 | /* Amount to shift by to convert an exception bit in FPSR to a an | |
44 | exception bit mask in FPCR. */ | |
45 | #define FE_EXCEPT_SHIFT 8 | |
46 | ||
47 | /* All supported exceptions. */ | |
48 | #define FE_ALL_EXCEPT \ | |
49 | (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) | |
50 | ||
51 | /* Define bits representing rounding modes in the FPCR Rmode field. */ | |
52 | #define FE_TONEAREST 0x000000 | |
53 | #define FE_UPWARD 0x400000 | |
54 | #define FE_DOWNWARD 0x800000 | |
55 | #define FE_TOWARDZERO 0xc00000 | |
56 | ||
57 | /* Type representing exception flags. */ | |
58 | typedef unsigned int fexcept_t; | |
59 | ||
60 | /* Type representing floating-point environment. */ | |
61 | typedef struct | |
62 | { | |
63 | unsigned int __fpcr; | |
64 | unsigned int __fpsr; | |
65 | } | |
66 | fenv_t; | |
67 | ||
68 | /* If the default argument is used we use this value. */ | |
69 | #define FE_DFL_ENV ((const fenv_t *) -1l) | |
70 | ||
71 | #ifdef __USE_GNU | |
72 | /* Floating-point environment where none of the exceptions are masked. */ | |
73 | # define FE_NOMASK_ENV ((const fenv_t *) -2) | |
74 | #endif | |
ec94343f JM |
75 | |
76 | #if __GLIBC_USE (IEC_60559_BFP_EXT) | |
77 | /* Type representing floating-point control modes. */ | |
78 | typedef unsigned int femode_t; | |
79 | ||
80 | /* Default floating-point control modes. */ | |
81 | # define FE_DFL_MODE ((const femode_t *) -1L) | |
82 | #endif |