#define GFC_FPE_INVALID      1
#define GFC_FPE_DENORMAL     2
#define GFC_FPE_ZERO         4
#define GFC_FPE_OVERFLOW     8
#define GFC_FPE_UNDERFLOW   16
#define GFC_FPE_INEXACT     32
#define GFC_FPE_DOWNWARD   1
#define GFC_FPE_TONEAREST  2
#define GFC_FPE_TOWARDZERO 3
#define GFC_FPE_UPWARD     4
#define GFC_FPE_STATE_BUFFER_SIZE 32