llvm-dcpu16/llvm-dcpu16 — pull request #174 by Blei (2012-05-16 19:37:49+00:00)
Title: Make the EX register more useful and implement rotation

See the commits.

I tried to make sure the EX register will not be the target register for instructions that
overwrite EX themselves. IIRC there was a clarification from notch what would happen
in that case, but it just sounds confusing and error prone.

Please tell me if I've overlooked something or if this business can be done in a simpler/
more appropriate manner.