AESE
AES single round encryption.
The AESE instruction reads a 16-byte state array from each 128-bit segment of the first source vector together with a round key from the corresponding 128-bit segment of the second source vector. Each state array undergoes a single round of the AddRoundKey(), SubBytes() and ShiftRows() transformations in accordance with the AES standard. Each updated state array is destructively placed in the corresponding segment of the first source vector. This instruction is unpredicated.
ID_AA64ZFR0_EL1.AES indicates whether this instruction is implemented.
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | Zm | Zdn |
if !HaveSVE2AES() then UNDEFINED; integer m = UInt(Zm); integer dn = UInt(Zdn);
Assembler Symbols
<Zdn> |
Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field. |
<Zm> |
Is the name of the second source scalable vector register, encoded in the "Zm" field. |
Operation
CheckSVEEnabled(); integer segments = VL DIV 128; bits(VL) operand1 = Z[dn]; bits(VL) operand2 = Z[m]; bits(VL) result; result = operand1 EOR operand2; for s = 0 to segments-1 Elem[result, s, 128] = AESSubBytes(AESShiftRows(Elem[result, s, 128])); Z[dn] = result;
Operational information
If PSTATE.DIT is 1:
- The execution time of this instruction is independent of:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.
- The response of this instruction to asynchronous exceptions does not vary based on:
- The values of the data supplied in any of its registers.
- The values of the NZCV flags.