[Info-vax] Intel previews new Itanium "Poulson" processor

[VAXman- at SendSpamHere.ORG]

In article <z8udnfNMgMGZcfvQnZ2dnUVZ_rGdnZ2d at earthlink.com>, "John Reagan" <johnrreagan at earthlink.net> writes:
>
>"John Wallace" <johnwallace4 at yahoo.co.uk> wrote in message 
>news:82372da4-1292-47c1-957a-955669c2cb9b at u6g2000vbh.googlegroups.com...
>On Feb 24, 8:34 pm, JF Mezei <jfmezei.spam... at vaxination.ca> wrote:
>>>
>>> Also, just so I understand correctly. If they have 12 instead of 6
>>> execution units, is it correct to state that a program compiled for
>>> Tukwila, will still use only 6 units on Poulson, leaving the remaining 6
>>> iddle ?
>
>>"a program compiled for Tukwila, will still use only 6 units on
>>Poulson, leaving the remaining 6 iddle ?"
>
>>That was the general EPIC principle. The compiler must see the
>>parallelizable stuff in a given block of code and construct bundles of
>>instructions accordingly. If the execution environment widens, a
>>recompile with the matching new compiler will be needed to make use of
>>the VVLIW capabilities (previously IA64 was a Very Long Instruction
>>Word, now it's a VVLIW). Some reports are quoting Intel as saying that
>>users should not have to recompile to take advantage of the 12-
>>instruction issue, which is a rather strange thing to say about
>>different generations of EPIC machines and compilers.
>
>
>Why do you folks keep repeating the same untruth over and over...  sigh...

Touche'!


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