1 /* Copyright (C) 1997, 1998, 1999 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
25 /* Define bits representing exceptions in the FPU status word. */
29 #define FE_INVALID FE_INVALID
31 #define FE_OVERFLOW FE_OVERFLOW
33 #define FE_UNDERFLOW FE_UNDERFLOW
35 #define FE_INEXACT FE_INEXACT
38 /* Amount to shift by to convert an exception to a mask bit. */
39 #define FE_EXCEPT_SHIFT 5
41 /* All supported exceptions. */
42 #define FE_ALL_EXCEPT \
43 (FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
45 /* IEEE rounding modes. */
49 #define FE_TONEAREST FE_TONEAREST
50 FE_TOWARDZERO = 0x400,
51 #define FE_TOWARDZERO FE_TOWARDZERO
53 #define FE_DOWNWARD FE_DOWNWARD
55 #define FE_UPWARD FE_UPWARD
58 #define FE_ROUND_MASK (FE_UPWARD)
60 #else /* !__MAVERICK__ */
62 /* Define bits representing exceptions in the FPU status word. */
66 #define FE_INVALID FE_INVALID
68 #define FE_DIVBYZERO FE_DIVBYZERO
70 #define FE_OVERFLOW FE_OVERFLOW
72 #define FE_UNDERFLOW FE_UNDERFLOW
75 /* Amount to shift by to convert an exception to a mask bit. */
76 #define FE_EXCEPT_SHIFT 16
78 /* All supported exceptions. */
79 #define FE_ALL_EXCEPT \
80 (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW)
82 /* The ARM FPU basically only supports round-to-nearest. Other rounding
83 modes exist, but you have to encode them in the actual instruction. */
84 #define FE_TONEAREST 0
86 #endif /* __MAVERICK__ */
88 /* Type representing exception flags. */
89 typedef unsigned long int fexcept_t;
91 /* Type representing floating-point environment. */
94 unsigned long int __cw;
98 /* If the default argument is used we use this value. */
99 #define FE_DFL_ENV ((fenv_t *) -1l)