Xref:	news2.mv.net comp.os.msdos.djgpp:5738
From:	Jim Schwarz x3-7961 <schwarz AT escmail DOT orl DOT mmc DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Setpixel in AT&T inline asm....
Date:	Mon, 08 Jul 1996 12:21:21 -0400
Organization:	Martin Marietta - Information Systems
Lines:	46
Message-ID:	<31E13581.C31@escmail.orl.mmc.com>
References:	<4rh0g5$m9r AT twain DOT mo DOT net>
NNTP-Posting-Host:	marino.orl.mmc.com
Mime-Version:	1.0
To:	vecna AT Walden DOT mo DOT net
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi,

 Here are a couple comments. You might want to check dj deloies sight
and following the tutorial pointers to the asm tutorial. Thats where
I got info when I started using AT&T syntax.

Jim
[vecna] wrote:
   (Stuff Deleted)
> setpixel(int x, int y, char c)
> {
>   asm("pushl %eax \n\t"
>       "pushl %ebx \n\t"
>       "pushl %edi \n\t"
> 
>       "movzx $_y, %eax \n\t"
>       "imul $320, %eax \n\t"
>       "movzx $_x, %ebx \n\t"
(more stuff deleted)
> The immediate problem being, it can't recognize movzx. I can't think of any

  With AT&T this command is movzsd. Check the tutorial since I seem
to recall there might be a useages difference also. Also there is
some kind of comment on the imul command which I don't recall. You 
can find info on that in machine dependencies section of the info
files.

> other alias this was be listed as... not to mention I'm really guessing here.
> There's probably tons of other flaws in this routine. (I really don't want to
> get into extended ASM just yet). Also, could someone confirm or correct me
> that a char is a byte, an int is 16 bits? (or is it 32?) geez, what I wouldn't
> give for db, dw, and dd right now.... oh well, thanks in advance.. :)
> 
> =============================================================================
> [vecna]                crs: code/music/design/www       boingo/crs/eos/#lunar
> vecna AT mo DOT net           www page: http://mo.net/~vecna     nineinchnails/quake
> moo AT tss DOT survivor DOT org   home of the nin music archive       Eomar on #lunarRPG
> =============================================================================

-- 
James E. Schwarz, Jr. PE

Staff Systems Engineer - Armor Programs
Lockheed Martin Corporation          Information Systems 
12506 Lk Underhill Rd. MP 823        Orlando, Fla 32825          
<schwarz AT escmail DOT orl DOT mmc DOT com>        Voice: (407)826-7961

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