no.of 1's

title: "count no.of 1's"
.model small
.stack 100h
.data
   num1 db 05
   count db dup(0)
.code
   mov ax,@data
       mov ds,ax
       xor ax,ax
   mov al,num1
   mov cx,08
   mov bl,0 
   again: rol al,1
          jnc noadd
          inc bl
   noadd:loop again
         mov count,bl
mov ah,4ch
   int 21h
   end