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/**
* 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 <float.h>
/* FPU status word exception flags */
#define FE_INEXACT _SW_INEXACT
#define FE_UNDERFLOW _SW_UNDERFLOW
#define FE_OVERFLOW _SW_OVERFLOW
#define FE_DIVBYZERO _SW_ZERODIVIDE
#define FE_INVALID _SW_INVALID
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
/* FPU control word rounding flags */
#define FE_TONEAREST _RC_NEAR
#define FE_UPWARD _RC_UP
#define FE_DOWNWARD _RC_DOWN
#define FE_TOWARDZERO _RC_CHOP
#if defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)
/* Amount to shift by to convert an exception to a mask bit. */
#define FE_EXCEPT_SHIFT 0x08
#else
/* 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
typedef struct
{
unsigned long _Fe_ctl;
unsigned long _Fe_stat;
} fenv_t;
/* Type representing exception flags. */
typedef unsigned long fexcept_t;
#ifdef __cplusplus
extern "C" {
#endif
/* The FE_DFL_ENV macro is required by standard.
fesetenv will use the environment set at app startup.*/
extern const fenv_t __mingw_fe_dfl_env;
#define FE_DFL_ENV (&__mingw_fe_dfl_env)
/* The C99 standard (7.6.9) allows us to define implementation-specific macros for
different fp environments */
#if defined(__i386__) || defined(__x86_64__)
/* The default Intel x87 floating point environment (64-bit mantissa) */
extern const fenv_t __mingw_fe_pc64_env;
#define FE_PC64_ENV (&__mingw_fe_pc64_env)
/* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */
extern const fenv_t __mingw_fe_pc53_env;
#define FE_PC53_ENV (&__mingw_fe_pc53_env)
#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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