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;* AddLong - Adds two double-word (long) integers.
;*
;* Shows:   Instructions - add     adc
;*          Operator - PTR
;*
;* Params:  Long1 - First integer
;*          Long2 - Second integer
;*
;* Return:  Sum as long integer
 
AddLong PROC,
        Long1:SDWORD, Long2:SDWORD
 
        mov     ax, WORD PTR Long1[0]   ; AX = low word, long1
        mov     dx, WORD PTR Long1[2]   ; DX = high word, long1
        add     ax, WORD PTR Long2[0]   ; Add low word, long2
        adc     dx, WORD PTR Long2[2]   ; Add high word, long2
        ret                             ; Result returned as DX:AX
 
AddLong ENDP
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