64-bit CPU

Andrej Marjan amarjan-e+AXbWqSrlAAvxtiuMwx3w at public.gmane.org
Thu Sep 16 20:28:32 UTC 2004


Peter L. Peres wrote:

>
> On Thu, 16 Sep 2004, Andrej Marjan wrote:
>
>> Hmm.. interesting. I had always assumed that MMX allowed you to do 64 
>> bit integer arithmetic directly, but based on a bit of googling, I 
>> can' find any arithmetic support for "quadwords", only for "dwords". 
>> SSE doesn't add this support either. Does SSE2?
>
>
> Afaik dword = 2*32 bits = 64 bits, qword = 4*32 bits = 128 bits, no ?


Not in (W)Intelworld. :) The terminology is straight out of the 
documentation. A word has been fixed at 16 bits.
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