LC3 Subroutine. Write a subroutine called MULTIPLY that will return the product of two numbers that...
Homework Answers
Below is the subroutine multiple
MULTIPLY
AND R2, R2, 0 //R2 will store value 0 now
ADD R3, PC, 2 //Store value of PC+2 into R3 which is the value of next instruction with label START
START :- ADD R2, R2, R1 //R2 = R2+R1
ADD R0, R0, -1 //This will reduce the count of R0 by 1
BRz END //Branch to label END if R0 becomes 0
JMP R3 //Jump at label START whose address is stored in R3, if R0 is not zero
END :- RET //Return instruction
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LC3
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