aese

AES Encrypt (A64)

AESE <Vd>.16B, <Vm>.16B

AES single round encryption (AArch64 NEON).

Details

AES single round encryption on 128-bit state using 128-bit round key. Applies SubBytes, ShiftRows, MixColumns, and AddRoundKey transformations. Used in AES encryption loops (not the final round). Requires Crypto extension. Condition flags are not affected.

Pseudocode Operation

state ← Vd.B[0:15]
key ← Vm.B[0:15]
state ← SubBytes(state)
state ← ShiftRows(state)
state ← MixColumns(state)
state ← state ⊕ key
Vd.B[0:15] ← state

Example

AESE v0.4s.16B, v2.4s.16B

Encoding

Binary Layout
01001110
00
101000010
0
10
Rn
Rd
 
Format Crypto
Opcode 0x4E284800
Extension Crypto

Operands

  • Vd
    State
  • Vm
    Key

Reference (Arm A64 ISA)

Instruction Forms

Encoding Instruction ISA Bit pattern
0x4E284800 AESE <Vd>.16B, <Vn>.16B A64 01001110 | 00 | 101000010 | 0 | 10 | Rn | Rd
0x4522E000 AESE <Zdn>.B, <Zdn>.B, <Zm>.B A64 01000101 | 0 | 0 | 10001 | 0 | 11100 | 0 | Zm | Zdn

Description

AES single round encryption.

Operation

AArch64.CheckFPAdvSIMDEnabled();

bits(128) operand1 = V[d, 128];
bits(128) operand2 = V[n, 128];
bits(128) result;
result = operand1 EOR operand2;
result = AESSubBytes(AESShiftRows(result));

V[d, 128] = result;