1/**
2 * This file has no copyright assigned and is placed in the Public Domain.
3 * This file is part of the mingw-w64 runtime package.
4 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
5 */
6#ifndef _FENV_H_
7#define _FENV_H_
8
9#include <float.h>
10
11
12/* FPU status word exception flags */
13#define FE_INEXACT _SW_INEXACT
14#define FE_UNDERFLOW _SW_UNDERFLOW
15#define FE_OVERFLOW _SW_OVERFLOW
16#define FE_DIVBYZERO _SW_ZERODIVIDE
17#define FE_INVALID _SW_INVALID
18#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
19
20/* FPU control word rounding flags */
21#define FE_TONEAREST _RC_NEAR
22#define FE_UPWARD _RC_UP
23#define FE_DOWNWARD _RC_DOWN
24#define FE_TOWARDZERO _RC_CHOP
25
26#if defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)
27
28/* Amount to shift by to convert an exception to a mask bit. */
29#define FE_EXCEPT_SHIFT 0x08
30
31#else
32
33/* The MXCSR exception flags are the same as the
34 FE flags. */
35#define __MXCSR_EXCEPT_FLAG_SHIFT 0
36
37/* How much to shift FE status word exception flags
38 to get the MXCSR exeptions masks, */
39#define __MXCSR_EXCEPT_MASK_SHIFT 7
40
41/* How much to shift FE status word exception flags
42 to get MXCSR rounding flags, */
43#define __MXCSR_ROUND_FLAG_SHIFT 3
44
45#endif /* defined(_ARM_) || defined(__arm__) */
46
47#ifndef RC_INVOKED
48
49typedef struct
50{
51 unsigned long _Fe_ctl;
52 unsigned long _Fe_stat;
53} fenv_t;
54
55/* Type representing exception flags. */
56typedef unsigned long fexcept_t;
57
58#ifdef __cplusplus
59extern "C" {
60#endif
61
62/* The FE_DFL_ENV macro is required by standard.
63 fesetenv will use the environment set at app startup.*/
64extern const fenv_t __mingw_fe_dfl_env;
65#define FE_DFL_ENV (&__mingw_fe_dfl_env)
66
67/* The C99 standard (7.6.9) allows us to define implementation-specific macros for
68 different fp environments */
69#if defined(__i386__) || defined(__x86_64__)
70
71/* The default Intel x87 floating point environment (64-bit mantissa) */
72extern const fenv_t __mingw_fe_pc64_env;
73#define FE_PC64_ENV (&__mingw_fe_pc64_env)
74
75/* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */
76extern const fenv_t __mingw_fe_pc53_env;
77#define FE_PC53_ENV (&__mingw_fe_pc53_env)
78
79#endif
80
81/*TODO: Some of these could be inlined */
82/* 7.6.2 Exception */
83
84extern int __cdecl feclearexcept (int _Flags);
85extern int __cdecl fegetexceptflag (fexcept_t * _Flagp, int _Excepts);
86extern int __cdecl feraiseexcept (int _Excepts);
87extern int __cdecl fesetexceptflag (const fexcept_t * _Flagp, int _Excepts);
88extern int __cdecl fetestexcept (int _Excepts);
89
90/* 7.6.3 Rounding */
91
92extern int __cdecl fegetround (void);
93extern int __cdecl fesetround (int _Mode);
94
95/* 7.6.4 Environment */
96
97extern int __cdecl fegetenv(fenv_t * _Envp);
98extern int __cdecl fesetenv(const fenv_t * _Envp);
99extern int __cdecl feupdateenv(const fenv_t * _Envp);
100extern int __cdecl feholdexcept(fenv_t * _Envp);
101
102#ifdef _GNU_SOURCE
103extern int __cdecl feenableexcept(int _Excepts);
104extern int __cdecl fedisableexcept(int _Excepts);
105extern int __cdecl fegetexcept(void);
106#endif
107
108#ifdef __cplusplus
109}
110#endif
111#endif /* Not RC_INVOKED */
112
113#endif /* ndef _FENV_H */