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CENG3420 Lab 3-2: LC-3b Datapath Bei Yu Department of Computer Science and Engineering The Chinese University of Hong Kong [email protected] Spring 2018 1 / 35

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Page 1: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

CENG3420Lab 3-2: LC-3b Datapath

Bei Yu

Department of Computer Science and EngineeringThe Chinese University of Hong Kong

[email protected]

Spring 2018

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Page 2: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Overview

Introduction

Lab3-2 Assignment

Golden Results

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Page 3: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Overview

Introduction

Lab3-2 Assignment

Golden Results

3 / 35

Page 4: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

The Slides are self-contained? NO!

Do please refer to following document:I LC-3b-datapath.pdfI LC-3b-ISA.pdf

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Page 5: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath

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Page 6: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

ReadAddress Instr[31-0]

InstructionMemory

Add

PC

4

Write Data

Read Addr 1

Read Addr 2

Write Addr

Register

File

ReadData 1

ReadData 2

ALU

ovf

zero

RegWrite

DataMemory

Address

Write Data

Read Data

MemWrite

MemRead

SignExtend16 32

MemtoReg

ALUSrc

Shiftleft 2

Add

PCSrc

RegDst

ALUcontrol

1

1

1

00

0

0

1

ALUOp

Instr[5-0]

Instr[15-0]

Instr[25-21]

Instr[20-16]

Instr[15 -11]

ControlUnit

Instr[31-26]

Branch

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Page 7: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

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Page 8: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath

I Five major drivers: MARMUX, PC, ALU, SHF, MDRI It is the means of data transfer between units

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Page 9: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath

Driver MARMUXI int inputOfGateMARMUX;

I Controlled by MARMUXI from IR[7:0] or adder (defined in

inputOfMARMUXFromAdder)I IR[7:0] is through LSHF1 (left shift 1 bit) & ZEXT

(zero extended)I Implementation of inputOfMARMUXFromAdder

has been provided

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Page 10: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath

Driver PCI int inputOfGatePC;

I Provided from PC

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Page 11: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath Driver ALUI int inputOfGateALU

I SR2MUX is controlled by IR[5:5] (refer to ANDinstruction)

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Page 12: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath Driver SHFI int inputOfGateSHF

I Implementation has been provided

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Page 13: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

LC-3b Datapath

Driver MDRI DATA_SIZE: if 0 then byte base; if 1 then word base.I If byte base, should check MAR[0]

I If 0: MDR[7:0]I If 1: MDR[15:8]

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Page 14: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Help on GateALU

I Input 1: SR1 (please refer to Figure C.6 (b))I Input 2: SR2MUX, select the second source operand (see instructions AND XOR

NOT)

/* input of GateALU */inputOfGateALU = blockALU(

GetALUK(CURRENT_LATCHES.MICROINSTRUCTION),CURRENT_LATCHES.REGS[blockSR1MUX(GetSR1MUX(CURRENT_LATCHES.

MICROINSTRUCTION), CURRENT_LATCHES.IR)],blockSR2MUX(xxx)

);

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Page 15: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Overview

Introduction

Lab3-2 Assignment

Golden Results

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Page 16: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Lab3-2 Assignment

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Page 17: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Overview

Introduction

Lab3-2 Assignment

Golden Results

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Page 18: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Assignment Package

I lc3bsim3-2.c, lc3bsim3-2.h: codes to work onI libems3-2.a: libraryI ucode3: FSMI Makefile

I bench: folder with benchmarks

Run the simulator:

1. make, then binary “lc3bsim3-2” is generated2. ./lc3bsim3-2 ucode3 bench/toupper.cod

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Page 19: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod

1. run 6

Simulating for 6 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 2MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 3MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 4MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0

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Page 20: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod (cont.)

2. rdump

Current register/bus values :-------------------------------------Cycle Count : 6PC : 0x3002IR : 0x0000STATE_NUMBER : 0x0023

BUS : 0x0000MDR : 0xe00fMAR : 0x3000CCs: N = 0 Z = 1 P = 0Registers:0: 0x00001: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 21: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod (cont.)

3. Go on run 1

Simulating for 1 cycles...

MemCycleCnt = 1MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 22: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod (cont.)

4. rdump

Current register/bus values :-------------------------------------Cycle Count : 7PC : 0x3002IR : 0xe00fSTATE_NUMBER : 0x0020

BUS : 0xe00fMDR : 0xe00fMAR : 0x3000CCs: N = 0 Z = 1 P = 0Registers:0: 0x00001: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 23: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod (cont.)

5. Go on run 5

Simulating for 5 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0

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Page 24: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case toupper.cod (cont.)

6. rdump

Current register/bus values :-------------------------------------Cycle Count : 12PC : 0x3004IR : 0xe00fSTATE_NUMBER : 0x0021

BUS : 0x0000MDR : 0x0000MAR : 0x3002CCs: N = 0 Z = 1 P = 0Registers:0: 0x30201: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 25: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod

1. run 7

Simulating for 7 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 2MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 3MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 4MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 26: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

2. rdump

Current register/bus values :-------------------------------------Cycle Count : 7PC : 0x3002IR : 0xe005STATE_NUMBER : 0x0020

BUS : 0xe005MDR : 0xe005MAR : 0x3000CCs: N = 0 Z = 1 P = 0Registers:0: 0x00001: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 27: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

3. Go on run 2

Simulating for 2 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 28: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

4. rdump

Current register/bus values :-------------------------------------Cycle Count : 9PC : 0x3002IR : 0xe005STATE_NUMBER : 0x0012

BUS : 0x300cMDR : 0xe005MAR : 0x3000CCs: N = 0 Z = 1 P = 0Registers:0: 0x300c1: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 29: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

5. Go on run 7

Simulating for 7 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 2MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 3MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 4MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 30: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

6. rdump

Current register/bus values :-------------------------------------Cycle Count : 16PC : 0x3004IR : 0x6200STATE_NUMBER : 0x0020

BUS : 0x6200MDR : 0x6200MAR : 0x3002CCs: N = 0 Z = 1 P = 0Registers:0: 0x300c1: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 31: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

7. Go on run 7

Simulating for 7 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 2MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 3MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 4MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0

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Page 32: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

8. rdump

Current register/bus values :-------------------------------------Cycle Count : 23PC : 0x3004IR : 0x6200STATE_NUMBER : 0x001b

BUS : 0x0000MDR : 0x000aMAR : 0x300cCCs: N = 0 Z = 1 P = 0Registers:0: 0x300c1: 0x00002: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 33: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

9. Go on run 1

Simulating for 1 cycles...

MemCycleCnt = 1MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 34: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

10. rdump

Current register/bus values :-------------------------------------Cycle Count : 24PC : 0x3004IR : 0x6200STATE_NUMBER : 0x0012

BUS : 0x000aMDR : 0x000aMAR : 0x300cCCs: N = 0 Z = 0 P = 1Registers:0: 0x300c1: 0x000a2: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 35: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

11. Go on run 1

Simulating for 1 cycles...

MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 36: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

12. rdump

Current register/bus values :-------------------------------------Cycle Count : 25PC : 0x3006IR : 0x6200STATE_NUMBER : 0x0021

BUS : 0x3004MDR : 0x000aMAR : 0x3004CCs: N = 0 Z = 0 P = 1Registers:0: 0x300c1: 0x000a2: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 37: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

13. Go on run 1

Simulating for 1 cycles...

MemCycleCnt = 0MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0

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Page 38: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

14. rdump

Current register/bus values :-------------------------------------Cycle Count : 26PC : 0x3006IR : 0x6200STATE_NUMBER : 0x0021

BUS : 0x0000MDR : 0x0000MAR : 0x3004CCs: N = 0 Z = 0 P = 1Registers:0: 0x300c1: 0x000a2: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 39: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

15. Go on run 4

Simulating for 4 cycles...

MemCycleCnt = 1MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 2MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 3MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 4MEM_EN = 1, R_W = 0, WE0 = 0, WE1 = 0

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Page 40: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

16. rdump

Current register/bus values :-------------------------------------Cycle Count : 30PC : 0x3006IR : 0x6200STATE_NUMBER : 0x0023

BUS : 0x0000MDR : 0x127fMAR : 0x3004CCs: N = 0 Z = 0 P = 1Registers:0: 0x300c1: 0x000a2: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 41: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

17. Go on run 3

Simulating for 3 cycles...

MemCycleCnt = 1MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0MemCycleCnt = 0MEM_EN = 0, R_W = 0, WE0 = 0, WE1 = 0

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Page 42: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Golden Results – case count10.cod (cont.)

18. rdump

Current register/bus values :-------------------------------------Cycle Count : 33PC : 0x3006IR : 0x127fSTATE_NUMBER : 0x0012

BUS : 0x0009MDR : 0x127fMAR : 0x3004CCs: N = 0 Z = 0 P = 1Registers:0: 0x300c1: 0x00092: 0x00003: 0x00004: 0x00005: 0x00006: 0x00007: 0x0000

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Page 43: CENG3420 Lab3-2:LC-3bDatapathbyu/CENG3420/2019Spring/slides/lab3-2.pdf · CENG3420 Lab3-2:LC-3bDatapath Bei Yu DepartmentofComputerScienceandEngineering TheChineseUniversityofHongKong

Thanks. For any question: [email protected]

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