Keep in mind that apparently Apple's architectural license is better than everyone else's, since it seems only Apple gets to extend the ISA in ways forbidden by

Keep in mind that apparently Apple's architectural license is better than everyone else's, since it seems only Apple gets to extend the ISA in ways forbidden by the architecture spec. AMD do have an architectural license, but they have never used it. All the ARM cores in their products have been licensed from ARM, not in-house designs, so far.