Re: Keeping other stuff with addresses (was: What is an N-bit machine?)

Thomas Koenig <tkoenig@netcologne.de> writes:

Anton Ertl <anton@mips.complang.tuwien.ac.at> schrieb:

Michael S <already5chosen@yahoo.com> writes:

On Sat, 30 Nov 2024 16:57:56 GMT
anton@mips.complang.tuwien.ac.at (Anton Ertl) wrote:
>

Thomas Koenig <tkoenig@netcologne.de> writes:

Anton Ertl <anton@mips.complang.tuwien.ac.at> schrieb: 

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. 

...

John Levine said "arythmetic". Not logic, not move, not swizzle, not
load/store. The widest arythmetic on Intel/AMD is 64 bits for inputs and
128 bits for output (integer multiplication).

>
The widest arithmetic registers on AMD64 with AVX-512 are the ZMM
registers with 512 bits each.

>
Can you do a 512-bit addition with it natively?

Whatever that may mean, it would not be relevant to the criterion,
which is "size of arithmetic registers".  However, John Levine has
modified his criterion in the meantime.

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