hot to enable CMPXCHG16B instruction

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grumble
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Joined: 2. Feb 2009, 11:08

hot to enable CMPXCHG16B instruction

Post by grumble »

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

Post by BillG »

You can't. Google is your friend.

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

Scroll down to the section on "Older Implementations".
Bill
grumble
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Joined: 2. Feb 2009, 11:08

Re: hot to enable CMPXCHG16B instruction

Post by grumble »

in vmware player 4 this instruction is enabled
ShaXbee
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Joined: 25. Apr 2013, 11:26

Re: hot to enable CMPXCHG16B instruction

Post by ShaXbee »

It is possible to enable support for this instruction:

Code: Select all

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.
mpack
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Re: hot to enable CMPXCHG16B instruction

Post by mpack »

Moved to Suggestions.
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