Ok, I found the G2 Core Ref Manual (G2CORERM.pdf). It gives me the name and syntax. Doesn't help if I don't know what it's doing. I'm picturing a document with a page for each instruction, or a least a text description of what it does. F'rinstance:
Mnemonic: addis Name: Add Immediate Shifted Syntax: rD,rA,SIMM (from G2CORERM)
OK (I infer), it adds the immediate value (SIMM) to rA and the result goes in rD. What gets shifted? By how much?
Even if I can't find the doc I expect, it would be a great help if someone can just explain this one instruction.
But c'mon, that document has to exist, right? Thanks.