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#define FE_TONEAREST  0
#define FE_TOWARDZERO 1

#define FE_INEXACT    0x04
#define FE_UNDERFLOW  0x08
#define FE_OVERFLOW   0x10
#define FE_DIVBYZERO  0x20
#define FE_INVALID    0x40
#define FE_ALL_EXCEPT 0x7c

typedef unsigned long fexcept_t;

typedef struct {
	unsigned long __cw;
} fenv_t;

#define FE_DFL_ENV    ((const fenv_t *) -1)