Mask group 8 instruction as BitOp, so we can share the
code for adjust the source operand.
Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>