Computer System Architecture - Microprogrammed Control

21. For the MIPS32 data path, the total number of micro-operations required to execute the instruction LW R4, 400(R5) will be .....................

  • Option : A
  • Explanation : The micro-operations will be:
    i. IR = Mem [PC]
    ii. NPC = PC + 4
    iii. A = Reg [rs]
    iv. Imm = (IR15)16 ## IR15..0
    v. ALUout= A + Imm
    vi. PC = NPC
    vii. LMD = Mem [ALUOut]
    viii. Reg [rt] = LMD
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