1 #define FE_INVALID 1 2 #define FE_DIVBYZERO 2 3 #define FE_OVERFLOW 4 4 #define FE_UNDERFLOW 8 5 #define FE_INEXACT 16 6 #define FE_ALL_EXCEPT 31 7 #define FE_TONEAREST 0 8 #define FE_DOWNWARD 0x800000 9 #define FE_UPWARD 0x400000 10 #define FE_TOWARDZERO 0xc00000 11 12 typedef unsigned long fexcept_t; 13 typedef unsigned long fenv_t; 14 15 #define FE_DFL_ENV ((const fenv_t *) -1) 16