Question

textbook solution does not appear correct. Write a MARIE program using a loop that multiplies two positive numbers by using repeated addition. For example, to multiply 3 × 6, the program would add 3 six times, or 3 + 3 + 3 + 3 + 3 + 3.

Answer 1

Write a MARIE code using a loop that multiplies two positive numbers by using repeated addition:

MARIE code:

ORG Load Store Loop, LoadSum Acde Store Load 200 Counter Counter Const1 Counter Store SkipCond 400 Jump Loopl END1 LoadSum Output Halt Counter, Dec A, B, Sum,Dec Cons Dec 1Xx: IXx:

Description:

ORG Load Store Loop1, Load Add Store Load Subt Store /ORIGIN of the program. Let's assume that program starts at address 200 /Load the second operand value. It will be used as counter 200 Counter Store as Counter /Load the Sum /Add operand value A to the Sum /Store the addition result in the Summ um Counter /Load the Counter Cons /Decrement Counter value by constant 1 Counter Store the counter SkipCond 400 /Skip condition: If counter 0 then discontinue looping Jump LooplIJump to Loopl i.e. if counter is not zero then continue looping END1,Load /Load the Final value of Sum /Print Output /Final value of Sum Contains multiplication result of A and B /Counter is having Initial value 0 /Input the initial value of A. /Input the initial value of B /Sum is having Initial value 0 /Defining constant value l /END of the program. um Output Halt Counter, Dec A, ec ec SumDec Const1, Dec END