/** * This file has no copyright assigned and is placed in the Public Domain. * This file is part of the w64 mingw-runtime package. * No warranty is given; refer to the file DISCLAIMER within this package. */#ifndef _FENV_H_#define _FENV_H_ #include <_mingw.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 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 __cplusplusextern "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 */