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MOV CR/DR instructions ignore the mod field (in the ModR/M byte). As the SDM states: "The 2 bits in the mod field are ignored". Accordingly, the second operand of these instructions is always a general purpose register. The current emulator implementation does not do so. If the mod bits do not equal 3, it expects the second operand to be in memory. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>