Question

Interpret the assembly program below: MOV R3,R0;

AND R0,R1;

EOR R1,R3;

ASR R1;

ADD R0,R1; a) In one word, what does the program compute with operands R0 and R1? Be specific. b) Can the operands be signed 2's complement numbers? c) Is there a possibility of corruption due to overflow or underflow?

Answer 1

Step-by-step explanation:

1. With the operands R0, R1, the program would compute AND operation and ADD operation .

2. The operands could truly be signed 2's complement encoded (i.e Yes) .

3. The overflow truly occurs when two numbers that are unsigned were added and the result is larger than the capacity of the register, in that situation, overflow would occur and it could corrupt the data.

When the result of an operation is smaller in magnitude than the smallest value represented by the data type, then arithmetic underflow will occur.