GATE Overflow Test Series | Computer Organization and Architecture | Test 1 | Question: 10

Question

Consider the following one address instruction for a hypothetical processor implementing a function:

MOVE x
MUL x
STORE z
MOVE x
MUL A
ADD z
ADD B
STORE y

Which of the following values represents the value of the function if $A = 7, B = 6$ and input value $x={10}_{16}$ (Hexadecimal)?

• A. $347_{10}$
• B. $176_{10}$
• C. $167_{10}$
• D. $374_{10}$

 

Answer 1

We get the equation: $y = x^2 + Ax + B$, and $A = 7$ and $B = 6$ so, the equation become $y = x^2 + 7x + 6$
    
Input value in decimal $= 16 \implies y = 374.$
   
So, Option D

Comments

sir does ‘move’ instruction here loads the values into Accumulator? What if i would have done

Load x

instead of Move x.

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See in question, x seems like one of the registers and not a memory address. So, Move x makes sense. Load x is used if x is a memory address ie., loading from memory to one of the registers or accumulator.

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Where is the value of z added in the equation?

Answer 2

.