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19The value of b is stored in r1, c is stored in r2, and a is stored in r0. Which set of ARM instructions will accomplish a = b & c?

Question

19The value of b is stored in r1, c is stored in r2, and a is stored in r0. Which set of ARM instructions will accomplish a = b & c?

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Solution

The ARM instructions to accomplish a = b & c would be:

MOV r0, r1
AND r0, r0, r2

Here's the step by step explanation:

  1. MOV r0, r1: This instruction moves the value of r1 (which is b) into r0 (which is a). So, now a equals b.

  2. AND r0, r0, r2: This instruction performs a bitwise AND operation on the values of r0 (which is now b) and r2 (which is c), and stores the result back into r0 (which is a). So, now a equals b & c.

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