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Re: [BUG] jecxz

On Wed, Oct 30, 2002 at 07:54:01PM -0200, Denis Vlasenko wrote:
> On 30 October 2002 18:59, Denis Vlasenko wrote:
> > bug.s
> > =====
> > .text
> > .align 4
> > .globl csum_ssemmxplus
> >
> > csum_ssemmxplus:
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;
> > jecxz 90f
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> > nop;nop;nop;nop;nop;nop;nop;nop;
> > 90:
> > nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;nop;
> >
> > as silently generates *NEGATIVE* jump address for that jecxz!
> 
> Similar bug just attacked me with loop instruction.
> The worst thing is _silent_ generation of wrong object code.

I got

bug.s: Assembler messages:
bug.s:8: Error: value of 168 too large for field of 1 bytes at 0000000000000015

That is binutils from CVS on 20021029.


H.J.
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