- sha1nexte
- Takes advantage of sha1h if supported
- Does the operation in a vector otherwise
- sha1msg2
- Instead of dumping everything to GPRs, we can do this with vectors
- Mostly matches ARM's sha1su1 instruction, but it is /just/
different enough to be annoying.
- sha256msg1
- Directly matches sha256u0
- Leaves the previous implementation alone