46. 16 & 32 BIT ADDITION IN 8086

16-BIT ADDITION

DATA SEGMENT

NUM DW 1234H, 0F234H

SUM DW 2 DUP(0)

DATA ENDS

CODE SEGMENT

ASSUME CS: CODE, DS:DATA

START: MOV AX,DATA

MOV DS,AX

MOV AX,NUM

MOV BX,0H

ADD AX,NUM+2

JNC DOWN

INC BX

DOWN: MOV SUM,AX

MOV SUM+2,BX

MOV AH,4CH

INT 21H

CODE ENDS

END START

INPUT :     1234H,   F234H

OUTPUT : 10468H

32-BIT ADDITION

DATA SEGMENT

NUM1 DW 0FFFFH,0FFFFH

NUM2 DW 1111H,1111H

SUM DW 4 DUP(0)

dATA ENDS

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START: MOV AX,DATA

MOV DS,AX

MOV AX,NUM1

ADD AX,NUM2

MOV SUM,AX

MOV AX,NUM1+2

ADC AX,NUM2+2

JNC DOWN

MOV SUM+4,01H

DOWN: MOV SUM+2,AX

MOV AH,4CH

INT 21H

CODE ENDS

END START

INPUT:     0FFFFFFFFH,      011111111H

OUTPUT: 0111111110H

32-BIT ADDITION USING DD DIRECTIVE

DATA SEGMENT

NUM1 DW 12345678H

NUM2 DW 12345678H

SUM DW 3 DUP(0)

DATA ENDS

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START:MOV AX,DATA

MOV DS,AX

LEA SI,NUM1

LEA DI,NUM2

MOV AX,[SI]

ADD AX,[DI]

MOV CX,[SI+2]

ADC CX,[DI+2]

JNC DOWN

MOV SUM+4,01H

DOWN:MOV SUM,AX

MOV SUM+2,CX

MOV AH,4CH

INT 21H

CODE ENDS

END START

INOUT:      12345678H,     12345678H

OUTPUT:   2468ACF0H

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