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Subject: Re: Company politics - intel c++ for computerchess sucks at K7

Author: Bo Persson

Date: 03:04:47 05/12/02

Go up one level in this thread


On May 11, 2002 at 09:44:18, Vincent Diepeveen wrote:

>On May 10, 2002 at 23:20:32, Robert Hyatt wrote:
>
>>On May 09, 2002 at 22:18:18, Vincent Diepeveen wrote:
>>
>>>On May 09, 2002 at 10:21:28, Robert Hyatt wrote:
>>>
>>>>On May 08, 2002 at 23:54:50, Vincent Diepeveen wrote:
>>>>
>>>>>Sometimes i hate company politics. A superb compiler intel c++
>>>>>they weakened it for K7. Where 5.0.1 compiler was pretty fast
>>>>>for the superb K7 processors, the 6.0 compiler is deliberatly
>>>>>doing bad for K7.
>>>>
>>>>
>>>>I doubt it is "deliberate".  Why would Intel worry about optimizing for
>>>>the K7 when they don't build them?
>>>>
>>>>Wouldn't make any sense at all, IMHO...
>>>
>>>because 5.0.1 is faster on k7 than 6.01
>>>
>>
>>
>>So what?  I have occasionally done things to Crafty to make it faster on
>>a pentium, which also makes it slower on _other_ architectures.  But since
>>I do 99% of my testing on Intel, this is the way things work out.  I could
>>see lots of places where optimizing for intel would break AMD processor
>>pipes at times...  The inverse is also true, but since AMD is not writing
>>a compiler for their chip, they don't have something to make them look
>>their best...
>>
>>Which will always hurt them on SPEC of course...
>>
>
>AMD must be busy with their own compiler, otherwise the whole
>Hammer chip is a major joke; only alternative could be visual m$ works
>on a compiler for it.
>

I will give you a clue:

MS has already promised to deliver Windows for the Hammer. Guess what compiler
they will be using!

Bo Perswson
bop2@telia.com



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