1#define FE_TONEAREST	0
 2#define FE_TOWARDZERO	1
 3#define FE_UPWARD	2
 4#define FE_DOWNWARD	3
 5
 6#define FE_INEXACT	0x00080000
 7#define FE_UNDERFLOW	0x00100000
 8#define FE_OVERFLOW	0x00200000
 9#define FE_DIVBYZERO	0x00400000
10#define FE_INVALID	0x00800000
11
12#define FE_ALL_EXCEPT	0x00f80000
13
14typedef unsigned fexcept_t;
15typedef unsigned fenv_t;
16
17#define FE_DFL_ENV ((const fenv_t *)-1)