From:	Mark Grocki <mgrocki AT umd DOT umich DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Self-modifying Inline Assembly
Date:	Sun, 05 Jan 1997 23:52:41 -0800
Organization:	University of Michigan
Lines:	19
Message-ID:	<32D0AF49.257B@umd.umich.edu>
NNTP-Posting-Host:	pm145-16.dialip.mich.net
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I've been reading through "More Tricks of the Game Programming Gurus",
and one of the chapters uses self-modifying code to speed up its sprite
rotation algorithm.  I'd love to use that technique in DJGPP's inline
ASM, but I don't know the syntax.  I've tried things like

    movl $0,%edx
label:
    movl _stuff,label-4

but the compiler doesn't seem to like it.  I'm sure it will allow me to
do it, with a flat memory model, but I think I'm just doing it wrong.

Help!  I'm running out of registers! :)

  Mark Grocki

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Hirise Software - 3D game and API developer for PCs
http://hirisesoftware.home.ml.org

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