Skip to content
GPGPU processor architecture
C++ C SystemVerilog Python Assembly Makefile Other
Find file
Latest commit e9e10f2 @jbush001 Change floating point tests
Reading test vector files in Verilog simuation was abysmally slow, because
of the virtual SDMMC device. It was taking ~30 seconds per test case. I junked
that implementation and made it compile in the test vectors. Also, abandoned
Berkeley test float for a simpler version that uses a similar technique of
generating constrained random floating point test values.

[ci skip]

Nyuzi Processor

Build Status Chat at

Nyuzi is an experimental multicore GPGPU processor. It supports vector floating point, hardware multithreading, and cache coherence. The SystemVerilog-based hardware implementation is synthesizable and runs on FPGA. This project also includes an LLVM-based C++ toolchain, tests, and other tools. It is useful for microarchitecture experimentation, performance modeling, and parallel software development.

Mailing list:!forum/nyuzi-processor-dev
License: Apache 2.0

Getting Started

The following instructions explain how to set up the Nyuzi development environment. This includes an emulator and cycle-accurate hardware simulator, which allow hardware and software development without an FPGA.

Install Prerequisites

Linux (Ubuntu)

This requires Ubuntu 14 or later to get the proper package versions. It should work for other distributions, but you will probably need to change some package names.

sudo apt-get -y install autoconf cmake make gcc g++ bison flex python \
    perl emacs openjdk-7-jdk swig zlib1g-dev python-dev libxml2-dev \
    libedit-dev ncurses-dev libsdl2-dev gtkwave imagemagick

Emacs is used for verilog-mode AUTO macros. The makefile executes this operation in batch mode


These instructions assume Mavericks or later. If you don't have XCode, install the command line compiler like this:

xcode-select --install

The next command installs the remaining packages, assuming you've installed MacPorts:

sudo port install cmake bison swig swig-python imagemagick libsdl2 curl emacs

You may optionally install GTKWave for analyzing waveform files.


I have not tested this on Windows. Many of the libraries are cross platform, so it should be possible to port it. But the easiest route is probably to run Linux under a virtual machine like VirtualBox.

Build (Linux & MacOS)

The following script will download and install the Nyuzi toolchain and Verilator Verilog simulator. (Although some Linux package managers have Verilator, they have old versions).


Build everything else:


Run tests:

make test

If you are on a Linux distribution that defaults to python3, you may run into build problems with the compiler. In tools/NyuziToolchain/tools/CMakeLists.txt, comment out the following line:


What next?

Sample applications are available in software/apps. You can run these in the emulator by typing 'make run' (some need 3rd party data files, details are in the READMEs in those directories).

For example, this will render a 3D model:

cd software/apps/sceneview
make run

Running on FPGA

See instructions in hardware/fpga/de2-115/

Something went wrong with that request. Please try again.