ECE219 — Computer Organization

Coursework repository for ECE219 — Computer Organization at the University of Thessaly. The labs cover MIPS assembly, C/assembly comparisons, Verilog datapath and control logic, and cache/performance experiments in C.

Quick overview

Area	What is included
MIPS assembly	Introductory assembly exercises and low-level programming practice.
C and assembly	C implementations, assembly comparisons, and generated assembly output at different optimization levels.
Verilog CPU labs	ALU/register-file work, single-cycle datapath/control logic, program memory files, and testbenches.
Cache/performance experiments	K-means image clustering and loop/cache experiments for comparing baseline and optimized C code.

Course contents

Recovered lab handouts for Labs 1–9 are collected under docs/handouts/.

Path	Description
Lab1/	Introductory MIPS assembly exercises.
Lab2/	Additional MIPS assembly exercises.
Lab3/	C and assembly implementations for low-level programming exercises.
Lab4/	Verilog ALU and register-file lab with testbench.
Lab5/	Single-cycle CPU datapath/control work with Verilog source, program memory files, and lab report.
Lab6/	Extended CPU implementation with control logic, hazard-related output checks, and report.
Lab7/	Negedge and posedge CPU variants with Verilog source, program memory files, and reports.
Lab8/	K-means image-clustering optimization lab with original and optimized C implementations.
Lab9/	C loop/performance experiments with generated assembly at default and -O3 optimization levels.

Requirements

• MIPS/SPIM/MARS-compatible assembler or simulator for .asm programs
• GCC for the C labs
• Icarus Verilog (iverilog and vvp) for Verilog simulation
• Optional: GTKWave for viewing generated .vcd waveforms
• Optional: Linux perf for the cache/performance measurement scripts

Build and run

Compile the Lab 3 C programs:

gcc -std=c11 -Wall -Wextra Lab3/src/exer1.c -o /tmp/ece219-lab3-exer1
gcc -std=c11 -Wall -Wextra Lab3/src/exer2.c -o /tmp/ece219-lab3-exer2

Compile the Lab 8 original and optimized implementations:

gcc -O3 -Wall -std=c99 Lab8/original/qdbmp.c Lab8/original/kmeans.c -lm -o /tmp/ece219-kmeans-original
gcc -O3 -Wall -std=c99 Lab8/optimized/qdbmp.c Lab8/optimized/kmeans.c -lm -o /tmp/ece219-kmeans-optimized

Compile the Lab 9 loop program:

gcc -Wall -Wextra Lab9/lab9_program.c -o /tmp/ece219-lab9
gcc -O3 -Wall -Wextra Lab9/lab9_program.c -o /tmp/ece219-lab9-o3

Compile representative Verilog labs without writing simulator outputs into the repository:

iverilog -Wall -Winfloop -o /tmp/ece219-lab4 Lab4/src/library.v Lab4/src/testbench.v
iverilog -Wall -Winfloop -I Lab5 -I Lab5/src -o /tmp/ece219-lab5 Lab5/src/library.v Lab5/src/cpu.v Lab5/src/testbench.v

For later labs that use local include files, run from the lab directory:

cd Lab6
iverilog -Wall -Winfloop -o /tmp/ece219-lab6 control.v library.v cpu.v testbench.v