;;;; bit manipulation
(define-instruction bsf (segment dst src)
+ (:printer ext-reg-reg/mem ((op #b1011110) (width 0)))
(:emitter
(let ((size (matching-operand-size dst src)))
(when (eq size :byte)
(emit-ea segment src (reg-tn-encoding dst)))))
(define-instruction bsr (segment dst src)
+ (:printer ext-reg-reg/mem ((op #b1011110) (width 1)))
(:emitter
(let ((size (matching-operand-size dst src)))
(when (eq size :byte)