v0.2.1

Decisions Taken:

• Select Markku's lwaes proposal going forward for RV32 based systems.
• Tentatively agree to have separate AES instructions for scalar RV32 and RV64 systems.

Changes:

• Swapped the order of rs1 and rs2 in the 32-bit AES proposal. Allows rd=rs1 for all usages of the instruction.
• Re-structured the draft specification document to clearly separate between RV32 and RV64 AES proposals.
  • Moved old AES proposals to an appendix for posterity.
• Adopted the saes32.* and saes64.* naming conventions for the scalar AES instructions.
  • Updated the binutils and spike patches accordingly.

Additions:

• A dedicated RV64 only aes proposal. Appears as section 4.4.2 in the draft specification.

Removals:

• Old AES proposal variant code has been removed because of the amount of repository clutter it generated. They can be recovered easily via version control if need be.