In a microprogrammed CPU datapath, an ALU operation cannot begin until operands are available at the ALU inputs. Which statement best captures this dependency?

Question

Answer

The decode stage eliminates the need to load operands because it “knows” the value and no other microoperation needs to be executed

Answer

Microoperations that move operands into the ALU input latches/registers must occur before the microoperation that triggers the ALU compute step

Answer

Operand moves are unnecessary if the instruction uses direct addressing

Answer

ALU compute can occur first and operands can be loaded afterward because results are buffered without any impact to the microoperations that need to be computed

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In a microprogrammed CPU datapath, an ALU operation cannot begin until operands ...

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