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From: anton@mips.complang.tuwien.ac.at (Anton Ertl)
Newsgroups: comp.arch
Subject: Re: Keeping other stuff with addresses (was: What is an N-bit machine?)
Date: Sat, 30 Nov 2024 11:35:36 GMT
Organization: Institut fuer Computersprachen, Technische Universitaet Wien
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anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:
>John Levine <johnl@taugh.com> writes:
>>These days I'd say the relevant N is the size of arithmetic registers but a
>>lot of marketers appear to disagree with me.
>
>Which arithmetic registers on an Intel processor?  The 64 bits of a
>GPR?  The 128 bits of an XMM register?  The 256 bits of a YMM
>register?  The 512 bits of a ZMM register?

The Cray-1 is even more interesting in that respect.  Is it a 4096-bit
machine?  I think there are also vector machines where you can
configure N bits into more shorter or fewer longer registers.

- anton
-- 
'Anyone trying for "industrial quality" ISA should avoid undefined behavior.'
  Mitch Alsup, <c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>