C4
# define C4(K,i) ROTATE(Cx.q[K.c[(i)*8+4]],32)
# define C4(K,i) (Cx.q[4+8*K.c[(i)*8+4]])
# define C4(K,i) (((u64*)(Cx.c+4))[2*K.c[(i)*8+4]])
#define C4 C2 C2 C2 C2
#define C4 60 /* 60-80 */