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Subject: Re: IA-64 vs OOOE (attn Taylor, Hyatt)

Author: Tom Kerrigan

Date: 13:13:29 02/12/03

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On February 12, 2003 at 11:47:21, Robert Hyatt wrote:

>But I don't
>think OOOE is _nearly_ as important for decent architectures as it is for
>architectures
>that have significant design problems like X86.

Fine, it's a 30% benefit to Alpha and MIPS, maybe it's 40% for x86...

>>>The Cray T932 was the last 64 bit machine they built that I used.  And it
>>How many NPS does Crafty get on it?
>about 7M.
>And that was Cray Blitz, not Crafty.  I have not tried to run Crafty on a Cray,

7M per processor? How many processors did those Crays come with? 32? So Crazy
Blitz was searching 224M NPS? I stand corrected, the T932 is several times
faster than any other processor ever made.

>>>I did a branchless FirstOne() in asm a few weeks back here, just to test.
>>>It used a cmov, and it wasn't slower than the one with a branch.  If the
>>On a Pentium III?
>On a pentium IV.
>Although I did test it on my PIII xeon box, so I guess the answer is "yes" to
>the III as
>well...

You "guess"? I never said anything about cmovs being bad for the P4, so why do
you keep talking about the P4?

-Tom



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