C2
#define C2(K, i) ROTATE(Cx.q[K.c[(i) * 8 + 2]], 16)
#define C2(K, i) (Cx.q[2 + 8 * K.c[(i) * 8 + 2]])
#define C2(K, i) (((u64_a1 *)(Cx.c + 6))[2 * K.c[(i) * 8 + 2]])
#define C2 10 /* Extra coefficient */
#define C2 gettynums[15].value
#define C2 20 /* 20-39 */