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#define FE_TONEAREST 0
#define FE_TOWARDZERO 1
#define FE_UPWARD 2
#define FE_DOWNWARD 3
#define FE_INEXACT 0x02000000
#define FE_DIVBYZERO 0x04000000
#define FE_UNDERFLOW 0x08000000
#define FE_OVERFLOW 0x10000000
#define FE_INVALID 0x20000000
#define FE_ALL_EXCEPT 0x3e000000
#ifdef _GNU_SOURCE
#define FE_INVALID_SNAN 0x01000000
#define FE_INVALID_ISI 0x00800000
#define FE_INVALID_IDI 0x00400000
#define FE_INVALID_ZDZ 0x00200000
#define FE_INVALID_IMZ 0x00100000
#define FE_INVALID_COMPARE 0x00080000
#define FE_INVALID_SOFTWARE 0x00000400
#define FE_INVALID_SQRT 0x00000200
#define FE_INVALID_INTEGER_CONVERSION 0x00000100
#define FE_ALL_INVALID 0x01f80700
#endif
typedef unsigned fexcept_t;
typedef double fenv_t;
#define FE_DFL_ENV ((const fenv_t *)-1)
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