What is the critical path for an MIPS AND instruction? Different execution units and blocks of digital

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What is the critical path for an MIPS AND instruction?


Different execution units and blocks of digital logic have different latencies (time needed to do their work). In Figure 4.2 there are seven kinds of major blocks. Latencies of blocks along the critical (longest-latency) path for an instruction determine the minimum latency of that instruction. For the remaining three problems in this exercise, assume the following resource latencies:a. b. I-Mem 200ps 750ps Add 70ps 200ps Mux 20ps 50ps ALU 90ps 250ps Regs 90ps 300ps D-Mem 250ps 500ps Control

Figure 4.2PC MUX Instruction memory  Add Address Instruction Add Data Register # Register # Register # RegWrite

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Computer Organization And Design The Hardware Software Interface

ISBN: 9780123747501

4th Revised Edition

Authors: David A. Patterson, John L. Hennessy

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