C3
#define C3(K, i) ROTATE(Cx.q[K.c[(i) * 8 + 3]], 24)
#define C3(K, i) (Cx.q[3 + 8 * K.c[(i) * 8 + 3]])
#define C3(K, i) (((u64_a1 *)(Cx.c + 5))[2 * K.c[(i) * 8 + 3]])
#define C3 40 /* 40-59 */