Ilya wrote: > > BTW, it's odd, but Geode LX databook [1] says that this processor supports > MMX, and 'sfence' is listed in the list of it's MMX instructions... > > [1] http://www.amd.com/files/connectivitysolutions/geode/geode_lx/ > 33234F_LX_databook.pdf
Actually I'm testing on a VIA C3 but it should be pretty similar since it supports both MMX and 3dNow. Perhaps the Geode does support sfence but my VIA C3 certainly does not and according to: http://en.wikipedia.org/wiki/X86_instruction_listings sfence is an SSE instruction. (There is no "citation needed" so I assume it is accurate.) -Mark.
