blob: f5f1d8f7e6374da38d5f436eae163caf3185e673 (
plain)
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
|
/*
* Copyright (c) 2021, Mițca Dumitru <dumitru0mitca@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <stdint.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
struct __x87_floating_point_environment {
uint16_t __control_word;
uint16_t __reserved1;
uint16_t __status_word;
uint16_t __reserved2;
uint16_t __tag_word;
uint16_t __reserved3;
uint32_t __fpu_ip_offset;
uint16_t __fpu_ip_selector;
uint16_t __opcode : 11;
uint16_t __reserved4 : 5;
uint32_t __fpu_data_offset;
uint16_t __fpu_data_selector;
uint16_t __reserved5;
};
typedef struct fenv_t {
struct __x87_floating_point_environment __x87_fpu_env;
uint32_t __mxcsr;
} fenv_t;
#define FE_DFL_ENV ((fenv_t const*)-1)
int fegetenv(fenv_t*);
int fesetenv(fenv_t const*);
int feholdexcept(fenv_t*);
int feupdateenv(fenv_t const*);
#define FE_INVALID 1u << 0
#define FE_DIVBYZERO 1u << 2
#define FE_OVERFLOW 1u << 3
#define FE_UNDERFLOW 1u << 4
#define FE_INEXACT 1u << 5
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
typedef uint16_t fexcept_t;
int fegetexceptflag(fexcept_t*, int exceptions);
int fesetexceptflag(fexcept_t const*, int exceptions);
int feclearexcept(int exceptions);
int fetestexcept(int exceptions);
int feraiseexcept(int exceptions);
#define FE_TONEAREST 0
#define FE_DOWNWARD 1
#define FE_UPWARD 2
#define FE_TOWARDZERO 3
int fesetround(int round);
int fegetround(void);
__END_DECLS
|
