Used. AMD64 removed segment limit checking. Base offsets are still applied for %fs and %gs, but not other segment registers. We got them to add a flag to re-

Used. AMD64 removed segment limit checking. Base offsets are still applied for %fs and %gs, but not other segment registers. We got them to add a flag to re-enable it (and SAHF), but Intel never had it. Nowadays it is all Vanderpool/Pacifica, aka VT-x/AMD-V.