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Subject: Re: Crafty results on a 246x2

Author: Robert Hyatt

Date: 17:01:10 09/24/03

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On September 24, 2003 at 18:41:59, Jeremiah Penery wrote:

>On September 24, 2003 at 12:01:01, Robert Hyatt wrote:
>
>>On September 23, 2003 at 18:23:20, Jeremiah Penery wrote:
>>
>>>On September 23, 2003 at 17:27:48, Slater Wold wrote:
>>>
>>>>As soon as they have a 64-bit Opteron compiler (publicly available), I'll let
>>>>you know.  ;)
>>>
>>>GCC already does.
>>
>>
>>You also need a 64 bit operating system,
>
>SuSE Linux has had an x86-64 version for a while.  I guess there are a couple of
>other now too.
>
> or else some assembly hacking.  And
>>then you have to get the compiler to produce a 64 bit code that will run on
>>the 32 bit O/S.
>
>Huh?


The opteron is an odd bird.  If it isn't initialized to 64 bit mode, you can't
get to the extra 64 bit registers.  A user mode program can't do that easily,
although I am sure it is possible with access to kernel mode and some inline
assembly.




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