* assembly/amd: start refactors
* cleanups
* those are global
* methods on ctx
* const cleanup
* range helper
* types and imports
* cleanups
* cleanups
* remove stale name
* fix emu2 types
* more typing
* more mypy
* cleanups
* fxns
* scc cleanup
* cleanups
* cleanups
* simpler parse_pcode
* laneid
* no defaults for pcode
* pcode is not optional
* cleanups
* functions cleanup
* splat
* expr_parser functions
* single tok
* invert global loops
* try_eat
* minor
* run parser on all
* no silent 0
* tests
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