Gas can't handle prefix generated by gcc

H. J. Lu hjl@lucon.org
Fri Jul 23 20:28:00 GMT 2004


On Fri, Jul 23, 2004 at 12:49:48PM -0700, Zack Weinberg wrote:
> Zack Weinberg <zack@codesourcery.com> writes:
> 
> > "H. J. Lu" <hjl@lucon.org> writes:
> >
> >> It seems that gcc uses a prefix syntax which gas doesn't handle. Does
> >> gcc always use " ; " as prefix separator?
> >
> > Yes.  It does that for cs/ds on branch hints, it does that for "rep"
> > on string instructions, it does that for "lock" on atomic updates.
> 
> Correction - it uses either " ; " or \n\t in all the above cases.
> 

It looks like a gcc bug to me. Assembler has a way to define prefixes
for an instruction. Unfortunately, gcc uses something else. I will
close the assembler bug.


H.J.



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