From:	"Bart Alewijnse" <scarfman AT geocities DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	AT&T style asm problem
Date:	17 Jun 1999 22:18:59 GMT
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Okay.. I'm modifying a sprite compiler for use in djgpp, and I dunno how to
do the
following.

I currently have
fprintf(outfile," \"movb 0x%02X, 0x%X(%%%%edi,,)\\n\\t\" \n", byte1,
offset);

that's in my C code. (extended asm, and the four %'s become two in the file
that's
written to.)That resoves to 
	"movb 0x12, 0x11D3(%%edi,,) \n\t"

The idea and the problem is the
immed32(basepointer,indexpointer,indexscale) 
format. I dunno how to use it... (I never have before) edi contains the
base screen
pointer. Offset, which becomes the immed32 integer, is obviously the
offset. What
format do I use now? (I filled in constants for ease of reading)
movb 0x12, 0x11D3(%%edi,$0,$0) ?
movb 0x12, 0x11D3(,,%%edi) ?
movb 0x12, 0x11D3($0,%%edi,$0) ?

Okay the last are a bit out of the blue.. Still, as fas as I know, they
might be right..
I know the last one isn't, I get about 200 'ignoring junk's:) Actually,
none of those
work, I think.

I assumed this, or something like it, would work, because in Intel format,
this is...
Uh... <searches a few directories>   "mov byte ptr [edi+11D3h],12h"

Which I'm pretty sure of works, 'cos this from is code from a what I would
call
respectable coder:)

-Bart

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