1 /* Copyright (C) 2004-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
23 /* Define bits representing exceptions in the FPSR status word. */
30 #define FE_DIVBYZERO 2
36 #define FE_UNDERFLOW 8
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
47 /* All supported exceptions. */
48 #define FE_ALL_EXCEPT \
49 (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
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
57 /* Type representing exception flags. */
58 typedef unsigned int fexcept_t
;
60 /* Type representing floating-point environment. */
68 /* If the default argument is used we use this value. */
69 #define FE_DFL_ENV ((const fenv_t *) -1l)
72 /* Floating-point environment where none of the exceptions are masked. */
73 # define FE_NOMASK_ENV ((const fenv_t *) -2)
76 #if __GLIBC_USE (IEC_60559_BFP_EXT)
77 /* Type representing floating-point control modes. */
78 typedef unsigned int femode_t
;
80 /* Default floating-point control modes. */
81 # define FE_DFL_MODE ((const femode_t *) -1L)