/usr/share/mingw-w64/include/fenv.h is in mingw-w64-common 4.0.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | /**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#ifndef _FENV_H_
#define _FENV_H_
#include <crtdefs.h>
#if defined(_ARM_) || defined(__arm__)
/* FPU status word exception flags */
#define FE_INVALID 0x01
#define FE_DIVBYZERO 0x02
#define FE_OVERFLOW 0x04
#define FE_UNDERFLOW 0x08
#define FE_INEXACT 0x10
#define FE_ALL_EXCEPT (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
/* FPU control word rounding flags */
#define FE_TONEAREST 0x00000000
#define FE_UPWARD 0x00400000
#define FE_DOWNWARD 0x00800000
#define FE_TOWARDZERO 0x00c00000
/* Amount to shift by to convert an exception to a mask bit. */
#define FE_EXCEPT_SHIFT 0x08
#else
#define FE_INVALID 0x01
#define FE_DENORMAL 0x02
#define FE_DIVBYZERO 0x04
#define FE_OVERFLOW 0x08
#define FE_UNDERFLOW 0x10
#define FE_INEXACT 0x20
#define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO \
| FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
/* FPU control word rounding flags */
#define FE_TONEAREST 0x0000
#define FE_DOWNWARD 0x0400
#define FE_UPWARD 0x0800
#define FE_TOWARDZERO 0x0c00
/* The MXCSR exception flags are the same as the
FE flags. */
#define __MXCSR_EXCEPT_FLAG_SHIFT 0
/* How much to shift FE status word exception flags
to get the MXCSR exeptions masks, */
#define __MXCSR_EXCEPT_MASK_SHIFT 7
/* How much to shift FE status word exception flags
to get MXCSR rounding flags, */
#define __MXCSR_ROUND_FLAG_SHIFT 3
#endif /* defined(_ARM_) || defined(__arm__) */
#ifndef RC_INVOKED
#if defined(_ARM_) || defined(__arm__)
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* Type representing floating-point environment. */
typedef struct
{
unsigned int __cw;
} fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1l)
#else
/*
For now, support only for the basic abstraction of flags that are
either set or clear. fexcept_t could be structure that holds more
info about the fp environment.
*/
typedef unsigned short fexcept_t;
/* This 32-byte struct represents the entire floating point
environment as stored by fnstenv or fstenv, augmented by
the contents of the MXCSR register, as stored by stmxcsr
(if CPU supports it). */
typedef struct
{
unsigned short __control_word;
unsigned short __unused0;
unsigned short __status_word;
unsigned short __unused1;
unsigned short __tag_word;
unsigned short __unused2;
unsigned int __ip_offset; /* instruction pointer offset */
unsigned short __ip_selector;
unsigned short __opcode;
unsigned int __data_offset;
unsigned short __data_selector;
unsigned short __unused3;
unsigned int __mxcsr; /* contents of the MXCSR register */
} fenv_t;
/*The C99 standard (7.6.9) allows us to define implementation-specific macros for
different fp environments */
/* The default Intel x87 floating point environment (64-bit mantissa) */
#define FE_PC64_ENV ((const fenv_t *)-1)
/* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */
#define FE_PC53_ENV ((const fenv_t *)-2)
/* The FE_DFL_ENV macro is required by standard.
fesetenv will use the environment set at app startup.*/
#define FE_DFL_ENV ((const fenv_t *) 0)
#endif /* defined(_ARM_) || defined(__arm__) */
#ifdef __cplusplus
extern "C" {
#endif
/*TODO: Some of these could be inlined */
/* 7.6.2 Exception */
extern int __cdecl feclearexcept (int);
extern int __cdecl fegetexceptflag (fexcept_t * flagp, int excepts);
extern int __cdecl feraiseexcept (int excepts );
extern int __cdecl fesetexceptflag (const fexcept_t *, int);
extern int __cdecl fetestexcept (int excepts);
/* 7.6.3 Rounding */
extern int __cdecl fegetround (void);
extern int __cdecl fesetround (int mode);
/* 7.6.4 Environment */
extern int __cdecl fegetenv(fenv_t * envp);
extern int __cdecl fesetenv(const fenv_t * );
extern int __cdecl feupdateenv(const fenv_t *);
extern int __cdecl feholdexcept(fenv_t *);
#ifdef __cplusplus
}
#endif
#endif /* Not RC_INVOKED */
#endif /* ndef _FENV_H */
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