two register ops

This wraps up everything that doesn't touch memory or a label.

Small cleanups and refactoring as I start to understand some
things better...

Change-Id: I788fa877cfcab8f87c961df28fe561b51a5c62ff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/222571
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Herb Derby <herb@google.com>
2 files changed