1 /* Copyright (C) 2004-2016 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."
22 /* Define bits representing exceptions in the FPU status word. */
29 #define FE_DIVBYZERO 2
35 #define FE_UNDERFLOW 8
42 /* Amount to shift by to convert an exception to a mask bit. */
43 #define FE_EXCEPT_SHIFT 8
45 /* All supported exceptions. */
46 #define FE_ALL_EXCEPT \
47 (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
49 /* VFP supports all of the four defined rounding modes. */
53 #define FE_TONEAREST 0
56 #define FE_UPWARD 0x400000
59 #define FE_DOWNWARD 0x800000
62 #define FE_TOWARDZERO 0xc00000
66 /* Type representing exception flags. */
67 typedef unsigned int fexcept_t
;
69 /* Type representing floating-point environment. */
76 /* If the default argument is used we use this value. */
77 #define FE_DFL_ENV ((const fenv_t *) -1l)
80 /* Floating-point environment where none of the exceptions are masked. */
81 # define FE_NOMASK_ENV ((const fenv_t *) -2)