From: broeker AT physik DOT rwth-aachen DOT de
Newsgroups: comp.os.msdos.djgpp
Subject: Re: rep
Date: 27 Mar 2000 14:10:56 GMT
Organization: Aachen University of Technology (RWTH)
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To: djgpp AT delorie DOT com
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GiLbI <GiLbI AT ngi DOT it> wrote:

> movl $153600,%ecx
> movl $0,%eax
> stosl repnz

That's definitely incorrect syntax. I wonder why gas didn't throw you
an error message for this.

> why if i write repxx at the beginning of statement it isn't correct?
> (repnz stosl  -> error)

Because unlike in Intel Syntax, 'rep*' is not a prefix, in AT&T asm;
it's a separate instruction. 

> and why "stosl repnz" repeat 1 times instead 153600?

Because there is no 'rep' applied to the 'stosl'.

> code converted with ta2as is "rep: stosl", but always the iterations are
> only one.

'rep: stosl', or maybe 'repnz: stosl' is the correct code, sort
of. You actually need two opcodes

	repnz
	stosl

The separation by ':' in the line above should do the same, but it may
not work, for some reason.

See the source code for '__dj_movedata()' in 'djlsr203.zip', for
comparison.


-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.