;examples

;---------------------------
; rotate left
mov ax, 0xF000
rol ax, 4

= 0x000F
;---------------------------
;---------------------------
; shift left
mov ax, 0x0050
shl ax, 8

= 0x5000
;---------------------------
; the same but we gained some space
mov ax, 0x0050 << 8

= 0x5000