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Re: i386/x86_64 segment register issuses

On Tue, Mar 29, 2005 at 04:27:59PM -0500, Ross Ridge wrote:
> > The higher bits are guaranteed to be zero for x86_64 and Pentium Pro
> > or above.
> 
> No, Intel has made no such guarantee for future processors, nor are they
> guaranteed to be zero for other existing processors.  
> 

Given that it is specified for x86_64, it will be very strange that
the future Intel ia32 processors are different from the future Intel
x86_64 processors in this regard. As for non-Intel processors, they
aren't Pentium Pro compatible if they are different.


H.J.
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