9. DIV Examples

1. The following fragment performs 8-bit unsigned division (83h/2), producing a quotient of 41h and a remainder of 1:

       mov ax, 83h ; dividend
       mov bl, 2   ; divisor
       div bl      ; quotient AL = 41h, remainder AH = 01h
   

    

2. The following instructions perform 16-bit unsigned division (8003h/100h), producing a quotient of 80h and a remainder of 3.
   Note that DX contains the high part of the dividend, so it must be cleared before the DIV instruction executes:

       mov dx, 0       ; clear high part of the dividend
       mov ax, 8003h   ; set low part of the dividend
       mov cx, 100h    ; set divisor
       div cx          ; quotient AX = 0080h, remainder DX = 0003h
   

    

3. The following fragment performs 32-bit unsigned division using a memory operand as the divisor:

       .data
       dividend QWORD 0000000800300020h
       divisor  DWORD 00000100h
       .code
       mov edx, DWORD PTR [dividend + 4] ; high doub1eword
       mov eax, DWORD PTR [dividend]     ; low doubleword
       div divisor                       ; quotient EAX = 08003000h, remainder EDX = 00000020h