Feature/101 ibcast

[aminiussi]

[timblechmann]

hmm, this is a good point. it's a little unfortunate that cmpxchg16b does not exist on early AMD processors. though it seems that even the win10 minimum requirements state that it requires this instruction.

though i'm wondering if the 57-bit virtual address space is enabled by simply running on those CPUs, or if it will require OS support to enable