Can someone please give me a detailed explanation on how to solve this? 3. [10 p

Question

Can someone please give me a detailed explanation on how to solve this?

3. [10 points] The table below shows the content of the N, Z, P condition code bits before and after execution of corresponding instructions in the following sequence of instructions. Instructions all belong to a single program and are not independent. They are executed in order; first inst# 1 then inst#2 and so on. What can you say about content of R2 before program was executed? NZP NZP (after) instruction 0101 010 0101 0001 010 010 000 001 001 100 010

Explanation / Answer

As per instruction 2 the value of R2 changes from positive to negative on adding 2.

This means that R2 is a high positive integer such that on addition of 2 it changes to a negative value due to flipping of sign bit.

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