ciabatta/inc/fenv.h

62 lines
1.4 KiB
C

#pragma once
typedef unsigned fexcept_t;
typedef unsigned fenv_t;
// These constants correspond to bits in MXCSR register
#define FE_INVALID (1 << 0)
#define FE_DIVBYZERO (1 << 2)
#define FE_OVERFLOW (1 << 3)
#define FE_UNDERFLOW (1 << 4)
#define FE_INEXACT (1 << 5)
#define FE_DENORM (1 << 1)
#define FE_DAZ (1 << 6)
#define FE_ALL_EXCEPT \
( FE_INVALID \
| FE_DIVBYZERO \
| FE_OVERFLOW \
| FE_UNDERFLOW \
| FE_INEXACT \
| FE_DENORM \
| FE_DAZ )
// These constants correspond to the rounding field in MXCSR register
#define FE_TONEAREST 0x00
#define FE_DOWNWARD 0x01
#define FE_UPWARD 0x02
#define FE_TOWARDZERO 0x03
extern fenv_t _fe_dfl_env;
#define FE_DFL_ENV (&_fe_dfl_env)
// Exceptions
int feclearexcept(int excepts);
int fegetexceptflag(fexcept_t *flagp, int excepts);
int feraiseexcept(int excepts);
int fesetexceptflag(const fexcept_t *flagp, int excepts);
int fetestexcept(int excepts);
// Rounding behaviour
int fegetround(void);
int fesetround(int round);
// Environment
int fegetenv(fenv_t *env);
int fesetenv(fenv_t *env);
int feholdexcept(fenv_t *envp);
int feupdateenv(fenv_t const *envp);
// Non-standard functions
int _feenabletraps(int excepts);
int _fedisabletraps(int excepts);
#if defined(_CIABATTA_EXT)
#define feenabletraps _feenabletraps
#define fedisabletraps _fedisabletraps
#endif