1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
19 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
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)*/
28 FE_INEXACT = 1UL << 5,
29 #define FE_INEXACT FE_INEXACT
31 FE_UNDERFLOW = 1UL << 4,
32 #define FE_UNDERFLOW FE_UNDERFLOW
34 FE_OVERFLOW = 1UL << 3,
35 #define FE_OVERFLOW FE_OVERFLOW
37 FE_DIVBYZERO = 1UL << 2,
38 #define FE_DIVBYZERO FE_DIVBYZERO
40 FE_UNNORMAL = 1UL << 1,
41 #define FE_UNNORMAL FE_UNNORMAL
43 FE_INVALID = 1UL << 0,
44 #define FE_INVALID FE_INVALID
47 (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID)
48 #define FE_ALL_EXCEPT FE_ALL_EXCEPT
55 #define FE_TOWARDZERO FE_TOWARDZERO
58 #define FE_UPWARD FE_UPWARD
61 #define FE_DOWNWARD FE_DOWNWARD
64 #define FE_TONEAREST FE_TONEAREST
68 /* Type representing exception flags. */
69 typedef unsigned long int fexcept_t;
71 /* Type representing floating-point environment. */
72 typedef unsigned long int fenv_t;
74 /* If the default argument is used we use this value. */
75 #define FE_DFL_ENV ((const fenv_t *) 0xc009804c0270033fUL)
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)
82 /* Floating-point environment with (processor-dependent) non-IEEE
83 floating point. In this case, turning on flush-to-zero mode for
85 # define FE_NONIEEE_ENV ((const fenv_t *) 0xc009a04d0270037fUL)