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Reactos
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107/** * 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_
/* 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 */