The serious problem of emulating x86&#x2F;x86-64 is that it has a strong memory model, while most other platforms (ARM, PowerPC, Itanium, Alpha) have a weak memory model. Only SPARC (SPARC TSO) and zSeries have a similarly strong memory model as x86&#x2F;x86-64.<p>See <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;w&#x2F;index.php?title=Memory_ordering&amp;oldid=672574002#In_symmetric_multiprocessing_.28SMP.29_microprocessor_systems" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;w&#x2F;index.php?title=Memory_ordering&amp;o...</a> for details.