FP_EX_INVALID
#define FP_EX_INVALID IEEE_TRAP_ENABLE_INV
#define FP_EX_INVALID (1 << 20)
#define FP_EX_INVALID (1 << (31 - 2))
#define FP_EX_INVALID (1<<4)
#define FP_EX_INVALID (1 << 4)
#define FP_EX_INVALID (1 << 4)
#define FP_EX_INVALID 0