_cpu_to_cfi
#define cpu_to_cfi16(map, x) _cpu_to_cfi(16, (map)->swap, (x))
#define cpu_to_cfi32(map, x) _cpu_to_cfi(32, (map)->swap, (x))
#define cpu_to_cfi64(map, x) _cpu_to_cfi(64, (map)->swap, (x))