AES64DS

AES-64 Decryption Schedule

AES64DS rd, rs1, rs2

Performs one round of AES-128 decryption key schedule generation.

Details

AES64DS performs two phases of the AES block cipher inverse SubBytes and ShiftRows transformation on 64-bit halves of the round state. Used in AES decryption.

Pseudocode Operation

R[rd] = aes_decrypt_schedule(R[rs1], R[rs2]);

Example

AES64DS x10, x11, x12

Encoding

Binary Layout
0011101
31:25
rs2
24:20
rs1
19:15
000
14:12
rd
11:7
0110011
6:0
 
Format R-Type
Opcode 0x33
Extension Zknd

Operands

  • rd
    Destination register (integer)
  • rs1
    Source register 1 (integer)
  • rs2
    Source register 2 (integer)