blob: 2228861624c4d14fee322c066d2c53838f4fbfe0 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif
/* Define bits representing the exception. We use the bit positions of
the appropriate bits in the FPSR Accrued Exception Byte. */
enum
{
FE_INEXACT =
#define FE_INEXACT (1 << 3)
FE_INEXACT,
FE_DIVBYZERO =
#define FE_DIVBYZERO (1 << 4)
FE_DIVBYZERO,
FE_UNDERFLOW =
#define FE_UNDERFLOW (1 << 5)
FE_UNDERFLOW,
FE_OVERFLOW =
#define FE_OVERFLOW (1 << 6)
FE_OVERFLOW,
FE_INVALID =
#define FE_INVALID (1 << 7)
FE_INVALID
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* The m68k FPU supports all of the four defined rounding modes. We use
the bit positions in the FPCR Mode Control Byte as the values for the
appropriate macros. */
enum
{
FE_TONEAREST =
#define FE_TONEAREST 0
FE_TONEAREST,
FE_TOWARDZERO =
#define FE_TOWARDZERO (1 << 4)
FE_TOWARDZERO,
FE_DOWNWARD =
#define FE_DOWNWARD (2 << 4)
FE_DOWNWARD,
FE_UPWARD =
#define FE_UPWARD (3 << 4)
FE_UPWARD
};
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* Type representing floating-point environment. This structure
corresponds to the layout of the block written by `fmovem'. */
typedef struct
{
unsigned int __control_register;
unsigned int __status_register;
unsigned int __instruction_address;
}
fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
#ifdef __USE_GNU
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
|
