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hot to enable CMPXCHG16B instruction

PostPosted: 27. Jul 2012, 07:44
by grumble
Hi all, I don't now how enable CMPXCHG16B cpu instruction. Pls help me.

Re: hot to enable CMPXCHG16B instruction

PostPosted: 27. Jul 2012, 09:00
by BillG
You can't. Google is your friend.

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

Scroll down to the section on "Older Implementations".

Re: hot to enable CMPXCHG16B instruction

PostPosted: 27. Jul 2012, 09:51
by grumble
in vmware player 4 this instruction is enabled

Re: hot to enable CMPXCHG16B instruction

PostPosted: 25. Apr 2013, 11:29
by ShaXbee
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.

Re: hot to enable CMPXCHG16B instruction

PostPosted: 25. Apr 2013, 11:36
by mpack
Moved to Suggestions.