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Wouter Tinus

03/07/06 3:01 AM

#25641 RE: jhalada #25640

Weird. Wasn't the consensus that there were 4? Could it just be a mistake.

I never read any speculation about integer units. Perhaps you are confusing that with issue width and/or instruction decoders?
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wbmw

03/07/06 10:34 AM

#25661 RE: jhalada #25640

Re: Conroe has 3 ALU/integer units

Weird. Wasn't the consensus that there were 4? Could it just be a mistake.


No, the decode issue width is 4. Given that x86 code generally has a load/store instruction for every computational instruction (so integer instructions are 50% of integer code, for example)), I can't imagine you'd need 4 of any single type of execution unit, except in very rare cases.