extern uint64_t pack754(long double f, unsigned bits, unsigned expbits);
extern long double unpack754(uint64_t i, unsigned bits, unsigned expbits);
#define fio_double_to_uint64(val) pack754((val), 64, 11)
#define fio_uint64_to_double(val) unpack754((val), 64, 11)
extern uint64_t pack754(long double f, unsigned bits, unsigned expbits);
extern long double unpack754(uint64_t i, unsigned bits, unsigned expbits);
#define fio_double_to_uint64(val) pack754((val), 64, 11)
#define fio_uint64_to_double(val) unpack754((val), 64, 11)