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The instruction, Add R1,R2,R3 in RTN is _______

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The instruction, Add R1,R2,R3 in RTN is _______

(a) R3=R1+R2+R3

(b) R3<-[R1]+[R2]+[R3]

(c) R3=[R1]+[R2]

(d) R3<-[R1]+[R2]

I had been asked this question by my college director while I was bunking the class.

My doubt stems from Instructions and Instruction Sequencing topic in division Machine Instructions and Programs of Computer Architecture

1 Answer

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Correct answer is (d) R3<-[R1]+[R2]

For explanation: In RTN the first operand is the destination and the second operand is the source.

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