md4_round3
md4_round3(&A, B, C, D, X0, 3);
md4_round3(&D, A, B, C, X8, 9);
md4_round3(&C, D, A, B, X4, 11);
md4_round3(&B, C, D, A, X12, 15);
md4_round3(&A, B, C, D, X2, 3);
md4_round3(&D, A, B, C, X10, 9);
md4_round3(&C, D, A, B, X6, 11);
md4_round3(&B, C, D, A, X14, 15);
md4_round3(&A, B, C, D, X1, 3);
md4_round3(&D, A, B, C, X9, 9);
md4_round3(&C, D, A, B, X5, 11);
md4_round3(&B, C, D, A, X13, 15);
md4_round3(&A, B, C, D, X3, 3);
md4_round3(&D, A, B, C, X11, 9);
md4_round3(&C, D, A, B, X7, 11);
md4_round3(&B, C, D, A, X15, 15);