Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!genrad!panda!talcott!harvard!seismo!hao!noao!arizona!megaron!rogerh
From: rogerh@megaron.UUCP
Newsgroups: net.arch
Subject: Re: Addressing modes (really self-modifying code)
Message-ID: <906@megaron.UUCP>
Date: Wed, 26-Feb-86 21:32:55 EST
Article-I.D.: megaron.906
Posted: Wed Feb 26 21:32:55 1986
Date-Received: Sat, 1-Mar-86 17:25:33 EST
References: <546@tekcrl.UUCP> <426@utastro.UUCP>
Reply-To: rogerh@megaron.UUCP (Roger Hayes)
Distribution: net
Organization: Dept of CS, U of Arizona, Tucson
Lines: 10

(Oh, no -- I've lost my reference for this!
 If anyone knows what goes in the blank ("[]") below,
 send me mail, thanks. -rh)

This (self-modifying code) is the way [] does a bitblt; the
entry code checks for the base cases, otherwise it builds
custom code to do the bitblt and then jumps to it.  Very
clever -- the case to build the code is larger than the 
case within the bitblt would be, but performance is much
higher because the code that's built can be optimal.