Me too!!

Did you say you were ordering one of these?

Bill.

2009/3/5 Jason Martin <jason.worth.mar...@gmail.com>:
>
>> I've got a 4.4c/l , Agner Fog's says the thruput on 64 bit mul is 4c/l , but
>> in another section it says you can issue one every cycle , if the latter
>> section means 32bit then , 4c/l could be right ( I say could not would as
>> consider the K8) , I expect I can do a bit better than 4.4c/l , but who
>> knows.A lot of the speed comes from reducing the overhead in mul_basecase.
>>
>> It quite a wide cpu , I would expect the combined functions(like addlsh1) to
>> make a real difference on it.
>
> I've measure it directly to be 4 cycles per mul for sustained 64-bit
> multiplies on core2, which agrees with Agner Fog.  Even though there
> are 3 ALU issue ports on the core2, only one of them can issue the
> 64-bit mul.
>
> By the way, I ended up sitting next to an Intel hardware engineer on a
> recent trans-atlantic flight.  He assured me that the Core i7 can
> perform sustained 64-bit multiplies at 1 cycle each.  Of course, I'll
> need to try this myself to believe it, but I'm pretty excited to get
> my hands on the hardware.
>
> --jason
> - Show quoted text -
> >
>

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