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From: PJ Naughter on 8 Feb 2007 11:46
On Wed, 07 Feb 2007 09:47:47 +0100, Joerg Wagner
<wagner(a)cs.tu-berlin.de> wrote:

>Hello,
>
>various sources speak of early Opterons missing the cmpxchg16 instruction (in fact, I have one, but it's running Linux).
>Will Win64 emulate that instruction on these systems (trapping the unknown opcode and use a spin lock) ?
>As the documentation of the VC8 compiler tells me, VC++ will emit a direct opcode, whenever I use InterlockedCompareExchange128, so I am in sorrow if my code will still work on these exotic machines ...
>
>Any help appreciated !
>
>Joerg

Would using the function Win32 IsProcessorFeaturePresent be any good
to you?

Regards,
PJ Naughter

Naughter Software
Mail: pjna at naughter.com
Web: www.naughter.com
Hotmail/MSN Messenger: pjnaughter at hotmail.com

It is finally on the shelves... the book from Joseph Gama and I:

http://www.amazon.com/Super-SQL-Server-Systems-Performance/dp/0976157322
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