Given Initial Values:
- R1: 11100111 (8 bits)
- R2: 00111100 (8 bits)
Micro-Operations:
1. Decrement R1:
- Values:
- R1 (After Decrement): 11100110
- Select Inputs: S0 = 0, S1 = 0, S2 = 1 (for Decrement)
- Carry-In: 1 (from Decrement operation)
- Result: 11100110 (8 bits), Carry-Out: 0
2. Add R1 and R2 with Carry:
-Values:
- R1 + R2 + Carry-In: 11100111 + 00111100 + 1 (Carry-In) = 100111100
- Select Inputs: S0 = 0, S1 = 1, S2 = 1 (for Add with Carry)
- Carry-In: 1 (from previous operation)
- Result: 00111100 (8 bits), Carry-Out: 1
3. Exclusive OR of R1 and R2:
- Values:
- R1 ⊕ R2: 11100111 ⊕ 00111100 = 11011011
- Select Inputs: S0 = 1, S1 = 0, S2 = 0 (for Exclusive OR)
- Carry-In: Not applicable for XOR operation
- Result: 11011011 (8 bits), Carry-Out: Not applicable
4. Shift Right R1:
- Values:
- Shift Right R1: 11100111 >> 1 = 11110011
- Select Inputs: S0 = 0, S1 = 0, S2 = 0 (for Shift Right)
- Carry-In: Not applicable for Shift Right operation
- Result: 11110011 (8 bits), Carry-Out: Least Significant Bit (LSB) becomes Carry-Out
These values are obtained based on the given micro-operations and the initial values of registers R1 and R2. The select inputs and carry-in values are set according to the specified micro-operation.
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