hot to enable CMPXCHG16B instruction

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hot to enable CMPXCHG16B instruction

Postby grumble » 27. Jul 2012, 07:44

Hi all, I don't now how enable CMPXCHG16B cpu instruction. Pls help me.
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Re: hot to enable CMPXCHG16B instruction

Postby BillG » 27. Jul 2012, 09:00

You can't. Google is your friend.

http://en.wikipedia.org/wiki/X86-64

Scroll down to the section on "Older Implementations".
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Re: hot to enable CMPXCHG16B instruction

Postby grumble » 27. Jul 2012, 09:51

in vmware player 4 this instruction is enabled
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Re: hot to enable CMPXCHG16B instruction

Postby ShaXbee » 25. Apr 2013, 11:29

It is possible to enable support for this instruction:
Code: Select all   Expand viewCollapse view
VBoxManage setextradata [vmname] VBoxInternal/CPUM/CMPXCHG16B 1


I gave more detailed description and information about source of bug on TRAC in ticket #10792.
Last edited by mpack on 25. Apr 2013, 11:36, edited 1 time in total.
Reason: Added ticket URL.
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Re: hot to enable CMPXCHG16B instruction

Postby mpack » 25. Apr 2013, 11:36

Moved to Suggestions.
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