v0.3.0

Decisions Taken:

• Settled on the RV64 scalar AES acceleration instruction designs.
• Removed the scalar sha3 indexing instructions from the proposal, since they are not useful.
• Remove the funnel shift instructions from the "shared with Bitmanip" section.
  • These were only tentatively proposed as a faster way of doing 64-bit rotations (for SHA3) on RV32, but ultimately proved unnecessary.

Changes:

• Modified the RV64 scalar AES instructions with Barry's enhanced KeySchedule proposal.
• Numerous miscellaneous typos/spelling/grammar fixes from Alexander Zeh.

Additions:

• Lightweight SM4 proposal based on lwaes_isa
• Lightweight SM3 proposal based on lwsha_isa
• Simple feature discovery mechanism.

Removals:

• All scalar SHA3 (ssha3) instructions.
  • Removed appendix section discussing on the SHA3 instructions.
• Funnel Shift instructions.