tree b444dcf73293702eea223fc2cad4fa46ca976a8d
parent fed9fb3ef0fd3b0e2928797933df0c8117b276a4
author Elliott Hughes <enh@google.com> 1712012342 +0000
committer Elliott Hughes <enh@google.com> 1712012342 +0000

Add riscv64 optimization placeholder.

Also clean up some of the other architectures and clarify some of
the comments.

Change-Id: I0ab3329ee0b542923a4d5f48147c1145862c4b95