(if (= index-reg #b100) nil index-reg)
(ash 1 index-scale))))))
((and (= mod #b00) (= r/m #b101))
- (list nil (sb!disassem:read-signed-suffix 32 dstate)) )
+ (list 'rip (sb!disassem:read-signed-suffix 32 dstate)) )
((= mod #b00)
(list full-reg))
((= mod #b01)