Assembly ProgrammingAssembly Programming

Notes for Practical 6Notes for Practical 6

Basic ArithmeticBasic Arithmetic

• AdditionAddition– Add destination, sourceAdd destination, source

• SubtractionSubtraction– Sub destination, sourceSub destination, source

• MultiplicationMultiplication

• DivisionDivision

AdditionAddition

• 10 + 6 = 1610 + 6 = 16

• mov ax, 10mov ax, 10

• add ax, 6 add ax, 6

• Java: ax = 10; ax = ax + 5;Java: ax = 10; ax = ax + 5;

SubtractionSubtraction

• 10 – 6 = 410 – 6 = 4

• mov ax, 10mov ax, 10

• sub ax, 6 sub ax, 6

• Java: ax = 10; ax = ax - 6;Java: ax = 10; ax = ax - 6;

MultiplicationMultiplication

4*5 = 204*5 = 20

•mov ax, 4mov ax, 4

•imul 5imul 5

•Java: ax = 4; ax = ax * 5;Java: ax = 4; ax = ax * 5;

DivisionDivision

• 13 ÷ 5 ( = 2 remainder 3)13 ÷ 5 ( = 2 remainder 3)

• mov ax, 13mov ax, 13

• idiv 5 idiv 5

• ax would have the quotient value ax would have the quotient value

• dx has the remainder value dx has the remainder value