Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 ◄Map►                                       ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────────────────────────────────────────────────────────────────
 
;* IdivLong - Divides a signed long integer by a signed short integer.
;* The procedure does not check for overflow or divide-by-zero.
;*
;* Shows:   Instruction - idiv
;*
;* Params:  Long1 - First integer (dividend)
;*          Short2 - Second integer (divisor)
;*          Remn - Pointer to remainder
;*
;* Return:  Quotient as short integer
 
IdivLong PROC USES di,
        Long1:SDWORD, Short2:SWORD, Remn:PSWORD
 
        mov     ax, WORD PTR Long1[0]   ; AX = low word of dividend
        mov     dx, WORD PTR Long1[2]   ; DX = high word of dividend
        idiv    Short2                  ; Divide by short integer
        LoadPtr es, di, Remn            ; ES:DI = remainder
        mov     es:[di], dx             ; Copy remainder
        ret                             ; Return with AX = quotient
 
IdivLong ENDP
                                    -♦-