Author: Keith Evans
Date: 21:30:41 06/28/03
Go up one level in this thread
On June 28, 2003 at 23:39:57, Robert Hyatt wrote: >On June 28, 2003 at 14:36:32, Jeremiah Penery wrote: > >>On June 28, 2003 at 14:23:50, Robert Hyatt wrote: >> >>>On June 28, 2003 at 12:12:15, Jay Urbanski wrote: >>> >>>>On June 28, 2003 at 10:33:45, Robert Hyatt wrote: >>>> >>>>>Those are not true 64 bit processors. Supposedly 32 bit stuff runs just >>>>>fine on them, but they have 64 bit extensions. >>>> >>>>How is Opteron not a true 64-bit processor? >>> >>> >>>Because it executes 32 bit instructions _also_. >>> >>>IE it is X86 compatible. >> >>So does the Itanium. That doesn't make it any less of a 64-bit processor. > > >The Itanium is not X86 compatible. In any shape or form. There is an >emulator, of course. But then the Alpha has a vax emulator. The interesting question is what are the implications of the Opteron not being a "true" 64-bit processor? Did you mean to imply that it is inferior to "true" 64-bit processors, or just that it was that much more of a challenge to design? In other words, is there any reason why anybody buying one should care? (I'll consider buying an Opteron if the EDA companies ever support it with 64-bit apps.)
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