_MC_IA32_HASFPXSTATE
mcp->mc_flags |= _MC_IA32_HASFPXSTATE;
if (mcp->mc_flags & _MC_IA32_HASFPXSTATE) {
(_MC_IA32_HASSEGS | _MC_IA32_HASBASES | _MC_IA32_HASFPXSTATE)