set hash subkey and tag SLD $3, R7, R12 MOVD R12, 48(R1) // set total AAD length SLD $3, R5, R12 MOVD R12, 56(R1) // set total plaintext/ciphertext length LMG key+8(FP), R8, R9 // R8=base R9=len MVC $16, (R8), 80(R1) // set key CMPBEQ R9, $16, kma MVC $8, 16(R8), 96(R1) CMPBEQ R9, $24, kma MVC $8, 24(R8), 104(R1) kma: KMA R2, R6, R4 // Cipher Message with Authentication BVS kma MOVD tag+104(FP), R2 MVC $16, 16(R1), 0(R2) // copy tag to output MOVD cnt+112(FP), R8 MVC $4, 12(R1), 12(R8) // update counter...