Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!rutgers!ll-xn!mit-eddie!uw-beaver!cornell!rochester!ritcv!cci632!ccicpg!felix!jim
From: jim@felix.UUCP (Jim Gilbert)
Newsgroups: comp.arch
Subject: Am29000 Reg-Reg Move?
Message-ID: <17473@felix.UUCP>
Date: 30 Dec 87 16:29:38 GMT
Sender: daemon@felix.UUCP
Reply-To: jim@fritz.UUCP (Jim Gilbert)
Organization: FileNet Corp., Costa Mesa, Ca.
Lines: 28


From my casual perusal of the Am29000 instruction set I notice no
convenient register-to-register move in one cycle.  I strongly suspect
I have overlooked something.

Upon reflection however, it may be that with 192 registers and three
operand addressing that the need for register to register moves does
not exist.

Would one of you folks from AMD comment on this?  I would be interested in
hearing from Tim Olson or Brian Case (now at Apple) regarding:

	Is there a single instruction, no preconditions, no side-effect,
	register to register move?  (I can contemplate EXTRACTing from
	destination to source, but that requires FC in ALU status word to
	be preset.)

	If not, did your discussions with compiler folks convince you
	that a register to register move was needless?  Is there prior
	research to this effect?

Thank you, in advance, for your time.

Jim Gilbert
FileNet Corporation
3565 Harbor Boulevard
Costa Mesa, CA 92626	

...{ihnp4,decvax,ucbvax}!{trwrb,hplabs}!felix!jim