sse4.1 sse4.2 extensions?

[sebcactus]

Hi,

Using Ubuntu 12.04 guest in on Snow Leopard, I don't have access to some specific extensions like sse4.1 sse4.2. (supported in desktop parallels)
Does anybody know whether these extensions are/will be supported by VB? In case it is already supported, how to make them visible?

Proc: intel Xeon X5650

Thanks,
Seb