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1/* Copyright (C) 1997-2019 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 <http://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. */
43typedef unsigned int fexcept_t;
44
45
46/* Type representing floating-point environment. */
47typedef struct
48 {
49 fexcept_t __excepts;
50 /* XXX I don't know what else we should save. */
51 }
52fenv_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)
58/* Type representing floating-point control modes. */
59typedef unsigned int femode_t;
60
61/* Default floating-point control modes. */
62# define FE_DFL_MODE ((const femode_t *) -1L)
63#endif
64

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