Tomasulo simulator

This is a project for the Advanced Computer Architectures course of Politecnico di Milano. It simulates the Tomasulo algorithm which is used in CPUs to improve throughput while avoiding hazards. It was implemented following the course slides and also this document, but changes were made where appropriate for simplicity.

How to run

This project requires python 3.6+

Virtualenv (optional)

I highly suggest creating a virtualenv in order to keep your system clean. You can do it in many ways, my preferred is using virtualenvwrapper. Follow this guide to install it, then create and activate the virtualenv with

mkvirtualenv tomasulo-simulator
workon tomasulo-simulator

You can exit the virtualenv with deactivate, and delete the virtualenv with rmvirtualenv tomasulo-simulator

Installing required libraries

pip install -r requirements.txt

Running

usage: simulation.py [-h] [--output OUTPUT] [--no-stats] [--interactive]
                     [--step-by-step] [--dump-assembled-instructions]
                     [--quiet]
                     program

Tomasulo algorithm simulator

positional arguments:
  program               the assembly file to execute

optional arguments:
  -h, --help            show this help message and exit
  --output OUTPUT, -o OUTPUT
                        Output statistics to json
  --no-stats, -n        Don't output statistics on STDOUT
  --interactive, -i     Spawn IPython shell during the simulation
  --step-by-step, -s    Execute the simulation step by step
  --dump-assembled-instructions, -d
                        Print the assembled instructions
  --quiet, -q           Don't print the program logo

See the examples directory for examples on how to write assembly for the machine.

TODO

document everything
(maybe) move the execution of instructions to the functional units instead of the reservation stations
- timings should not change, but it would better represent a real CPU
implement reorder buffer
implement speculation (issue-wise and execution-wise)
write tests and a way to run them
implement NOT instruction
finish implementing floating point instructions
indirect jumps (e.g. JMP R1)
allow load/stores like LD R1, [R2]

fcremo/tomasulo-simulator

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