Assembly Language Program to Subtract Values of Registers Using SUB instruction
SUB is keyword used for subtraction for two values. It also needs two operands, destination and source. After subtraction, answer is stored in destination address. It syntax is as follows:
SUB destination, source
Examples are as follows:
- SUB DL, 4
- SUB AL, Var1
An example of assembly program using SUB is written below:
.model small
.stack 100h
.data
.code
main proc
mov bl, 5
mov dl, 3
SUB dl, bl
Add dl, 48
mov ah, 2
INT 21h
mov ah, 4ch
INT 21h
main endp
end main