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CENG3420 Lab 3-3: LC-3b Datapath Wei Li Department of Computer - PowerPoint PPT Presentation

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CENG3420 Lab 3-3: LC-3b Datapath Wei Li Department of Computer Science and Engineering The Chinese University of Hong Kong wli@cse.cuhk.edu.hk Spring 2020 1 / 10 Overview Introduction Lab3-3 Assignment Golden Results 2 / 10 Overview

  1. CENG3420 Lab 3-3: LC-3b Datapath Wei Li Department of Computer Science and Engineering The Chinese University of Hong Kong wli@cse.cuhk.edu.hk Spring 2020 1 / 10

  2. Overview Introduction Lab3-3 Assignment Golden Results 2 / 10

  3. Overview Introduction Lab3-3 Assignment Golden Results 3 / 10

  4. The Slides are self-contained? NO! Do please refer to following document: ◮ LC-3b-datapath.pdf ◮ LC-3b-ISA.pdf 3 / 10

  5. LC-3b Datapath In lab 3-2, we write data into bus. 4 / 10

  6. LC-3b Datapath In this lab, we read data from bus: ◮ NEXT_LATCHES.PC ◮ NEXT_LATCHES.IR ◮ NEXT_LATCHES.MAR ◮ NEXT_LATCHES.N ◮ NEXT_LATCHES.Z ◮ NEXT_LATCHES.P 4 / 10

  7. Overview Introduction Lab3-3 Assignment Golden Results 5 / 10

  8. Lab3-3 Assignment 1 ◮ Paste your previous codes into eval_bus_drivers() & drive_bus() . ◮ Finish the following function. 5 / 10

  9. Lab3-3 Assignment 2: blockPCMUX int blockPCMUX(int lPCMUX, int lPCAdd2, int lBUS, int lAdder) Special treatment again! The PCMUX selection criteria is different based on your SID Orig lPCMUX = 0: lPCAdd2 or1: lBUS ; 2: lAdder ; SID with even ending: lPCMUX = 0: lBUS ; 1: lPCAdd2 ; 2: lAdder ; SID with odd ending: lPCMUX = 0: lAdder ; 1: lBUS ; 2: lPCAdd2 ; 6 / 10

  10. Overview Introduction Lab3-3 Assignment Golden Results 7 / 10

  11. Assignment Package ◮ lc3bsim3-3.c, lc3bsim3.h : codes to work on ◮ libems3-3-(darwin/linux).a : library ◮ ucode3 : FSM ◮ Makefile ◮ bench : folder with benchmarks Run the simulator: 1. make , then binary “lc3bsim3-3” is generated 2. For even ending SID: ./lc3bsim3-3 ucode3-even bench/toupper.cod 3. For odd ending SID: ./lc3bsim3-3 ucode3-odd bench/toupper.cod 7 / 10

  12. Golden Results – case toupper.cod ◮ Please refer to Lab 3-1 slides. 8 / 10

  13. Golden Results – case count10.cod ◮ Please refer to Lab 3-2 slides. 9 / 10

  14. Thanks. For any question: byu@cse.cuhk.edu.hk wli@cse.cuhk.edu.hk 10 / 10

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