#ifndef _FENV_H
#define _FENV_H
#include <sys/cdefs.h>
__BEGIN_DECLS
#if defined(__i386__)
enum
{
FE_INVALID = 0x01,
#define FE_INVALID FE_INVALID
__FE_DENORM = 0x02,
FE_DIVBYZERO = 0x04,
#define FE_DIVBYZERO FE_DIVBYZERO
FE_OVERFLOW = 0x08,
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = 0x10,
#define FE_UNDERFLOW FE_UNDERFLOW
FE_INEXACT = 0x20
#define FE_INEXACT FE_INEXACT
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_DOWNWARD = 0x400,
#define FE_DOWNWARD FE_DOWNWARD
FE_UPWARD = 0x800,
#define FE_UPWARD FE_UPWARD
FE_TOWARDZERO = 0xc00
#define FE_TOWARDZERO FE_TOWARDZERO
};
#define FE_DFL_ENV ((__const fenv_t *) -1)
/* Type representing exception flags. */
typedef unsigned short int fexcept_t;
/* Type representing floating-point environment. This function corresponds
to the layout of the block written by the `fstenv'. */
typedef struct {
unsigned short int __control_word;
unsigned short int __unused1;
unsigned short int __status_word;
unsigned short int __unused2;
unsigned short int __tags;
unsigned short int __unused3;
unsigned int __eip;
unsigned short int __cs_selector;
unsigned int __opcode:11;
unsigned int __unused4:5;
unsigned int __data_offset;
unsigned short int __data_selector;
unsigned short int __unused5;
} fenv_t;
#elif defined(__ia64__)
enum
{
FE_INEXACT = 1UL << 5,
#define FE_INEXACT FE_INEXACT
FE_UNDERFLOW = 1UL << 4,
#define FE_UNDERFLOW FE_UNDERFLOW
FE_OVERFLOW = 1UL << 3,
#define FE_OVERFLOW FE_OVERFLOW
FE_DIVBYZERO = 1UL << 2,
#define FE_DIVBYZERO FE_DIVBYZERO
FE_UNNORMAL = 1UL << 1,
#define FE_UNNORMAL FE_UNNORMAL
FE_INVALID = 1UL << 0,
#define FE_INVALID FE_INVALID
FE_ALL_EXCEPT =
(FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID)
#define FE_ALL_EXCEPT FE_ALL_EXCEPT
};
enum
{
FE_TOWARDZERO = 3,
#define FE_TOWARDZERO FE_TOWARDZERO
FE_UPWARD = 2,
#define FE_UPWARD FE_UPWARD
FE_DOWNWARD = 1,
#define FE_DOWNWARD FE_DOWNWARD
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
};
#define FE_DFL_ENV ((__const fenv_t *) 0xc009804c0270033fUL)
typedef unsigned long int fexcept_t;
typedef unsigned long int fenv_t;
#elif defined(__powerpc__)
enum
{
FE_INEXACT = 1 << (31 - 6),
#define FE_INEXACT FE_INEXACT
FE_DIVBYZERO = 1 << (31 - 5),
#define FE_DIVBYZERO FE_DIVBYZERO
FE_UNDERFLOW = 1 << (31 - 4),
#define FE_UNDERFLOW FE_UNDERFLOW
FE_OVERFLOW = 1 << (31 - 3),
#define FE_OVERFLOW FE_OVERFLOW
/* ... except for FE_INVALID, for which we use bit 31. FE_INVALID
actually corresponds to bits 7 through 12 and 21 through 23
in the FPSCR, but we can't use that because the current draft
says that it must be a power of 2. Instead we use bit 2 which
is the summary bit for all the FE_INVALID exceptions, which
kind of makes sense. */
FE_INVALID = 1 << (31 - 2),
#define FE_INVALID FE_INVALID
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_TOWARDZERO = 1,
#define FE_TOWARDZERO FE_TOWARDZERO
FE_UPWARD = 2,
#define FE_UPWARD FE_UPWARD
FE_DOWNWARD = 3
#define FE_DOWNWARD FE_DOWNWARD
};
typedef unsigned int fexcept_t;
typedef double fenv_t;
extern const fenv_t __fe_dfl_env;
#define FE_DFL_ENV (&__fe_dfl_env)
#elif defined(__s390__)
enum
{
FE_INVALID = 0x80,
#define FE_INVALID FE_INVALID
FE_DIVBYZERO = 0x40,
#define FE_DIVBYZERO FE_DIVBYZERO
FE_OVERFLOW = 0x20,
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = 0x10,
#define FE_UNDERFLOW FE_UNDERFLOW
FE_INEXACT = 0x08
#define FE_INEXACT FE_INEXACT
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_DOWNWARD = 0x3,
#define FE_DOWNWARD FE_DOWNWARD
FE_UPWARD = 0x2,
#define FE_UPWARD FE_UPWARD
FE_TOWARDZERO = 0x1
#define FE_TOWARDZERO FE_TOWARDZERO
};
#define FE_DFL_ENV ((__const fenv_t *) -1)
typedef unsigned int fexcept_t; /* size of fpc */
typedef struct
{
fexcept_t fpc;
void *ieee_instruction_pointer;
/* failing instruction for ieee exceptions */
} fenv_t;
#elif defined(__sparc__)
enum
{
FE_INVALID = (1 << 9),
#define FE_INVALID FE_INVALID
FE_OVERFLOW = (1 << 8),
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = (1 << 7),
#define FE_UNDERFLOW FE_UNDERFLOW
FE_DIVBYZERO = (1 << 6),
#define FE_DIVBYZERO FE_DIVBYZERO
FE_INEXACT = (1 << 5)
#define FE_INEXACT FE_INEXACT
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
enum
{
FE_TONEAREST = (0U << 30),
#define FE_TONEAREST FE_TONEAREST
FE_TOWARDZERO = (1U << 30),
#define FE_TOWARDZERO FE_TOWARDZERO
FE_UPWARD = (2U << 30),
#define FE_UPWARD FE_UPWARD
FE_DOWNWARD = (3U << 30)
#define FE_DOWNWARD FE_DOWNWARD
};
#define __FE_ROUND_MASK (3U << 30)
#define FE_DFL_ENV ((__const fenv_t *) -1)
typedef unsigned long int fexcept_t;
typedef unsigned long int fenv_t;
#elif defined(__x86_64__)
enum
{
FE_INVALID = 0x01,
#define FE_INVALID FE_INVALID
__FE_DENORM = 0x02,
FE_DIVBYZERO = 0x04,
#define FE_DIVBYZERO FE_DIVBYZERO
FE_OVERFLOW = 0x08,
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = 0x10,
#define FE_UNDERFLOW FE_UNDERFLOW
FE_INEXACT = 0x20
#define FE_INEXACT FE_INEXACT
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_DOWNWARD = 0x400,
#define FE_DOWNWARD FE_DOWNWARD
FE_UPWARD = 0x800,
#define FE_UPWARD FE_UPWARD
FE_TOWARDZERO = 0xc00
#define FE_TOWARDZERO FE_TOWARDZERO
};
#define FE_DFL_ENV ((__const fenv_t *) -1)
typedef unsigned short int fexcept_t;
typedef struct {
unsigned short int __control_word;
unsigned short int __unused1;
unsigned short int __status_word;
unsigned short int __unused2;
unsigned short int __tags;
unsigned short int __unused3;
unsigned int __eip;
unsigned short int __cs_selector;
unsigned int __opcode:11;
unsigned int __unused4:5;
unsigned int __data_offset;
unsigned short int __data_selector;
unsigned short int __unused5;
unsigned int __mxcsr;
} fenv_t;
#else
#error unsupported platform, edit include/fenv.h
#endif
int feclearexcept(int);
int fegetexceptflag(fexcept_t *, int);
int feraiseexcept(int);
int fesetexceptflag(const fexcept_t *, int);
int fetestexcept(int);
int fegetround(void);
int fesetround(int);
int fegetenv(fenv_t *);
int feholdexcept(fenv_t *);
int fesetenv(const fenv_t *);
int feupdateenv(const fenv_t *);
__END_DECLS
#endif
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