/usr/share/mingw-w64/include/fenv.h is in mingw-w64-common 3.2.0-2.
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 | /**
* 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>
/* FPU status word exception flags */
#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
#ifndef RC_INVOKED
/*
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)
#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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