Nyuzi is a GPGPU processor core implemented in SystemVerilog. It features a modern design, including a vector floating point pipeline, fine grained hardware multithreading, multiprocessor support, and a coherent L1/L2 cache hierarchy. It is fully synthesizable and the core features have been validated on FPGA. This project also includes a C++ toolchain based on LLVM, an emulator, software libraries, and verification tests. It is useful as a platform for microarchitecture experimentation, performance modeling, and parallel software development.

License: GPLv2/LGPLv2.
Documentation: https://github.com/jbush001/NyuziProcessor/wiki
Mailing list: https://groups.google.com/forum/#!forum/nyuzi-processor-dev

This environment allows cycle-accurate simulation of the hardware without an FPGA.

The following software packages are required.

1. GCC 4.8+ or Apple Clang 4.2+
2. Python 2.7
3. Verilator 3.864+.
4. C/C++ cross compiler toolchain targeting this architecture. Download and build from https://github.com/jbush001/NyuziToolchain using instructions in the README file in that repository.
5. libsdl 2.0
6. ImageMagick (to create framebuffer grabs from 3D engine)
7. Optional: Emacs v23.2+, for AUTOWIRE/AUTOINST. (This can be used in batch mode by typing 'make autos' in the rtl/ directory).
8. Optional: Java (J2SE 6+) for visualizer app
9. Optional: GTKWave for analyzing waveform files

On Linux, these can be installed using the built-in package manager (apt-get, yum, etc). Here is the command line for Ubuntu:

sudo apt-get install gcc g++ python emacs openjdk-7-jdk gtkwave imagemagick libsdl2-dev

Some package managers do have verilator, but the version is pretty old. Bug fixes in more recent versions are necessary for this to run correctly, so you may need to build it manually (typing verilator --version will indicate if your version is correct)

MacOS should have python by default. You will need to install XCode from the App Store to get the host compiler. To install the remaining packages, I would recommend a package manager like MacPorts. The command line for that would be:

sudo port install imagemagick libsdl2

I have not tested this on Windows. Many of the libraries are already cross platform, so it should theoretically be possible.

1. Build verilog models, libraries, and tools. From the top directory of this project, type:

    make
   

2. To run verification tests (in Verilog simulation). From the top directory:

    make test
   

3. To render a teapot (output image stored in framebuffer.png)

    cd tests/render/teapot
    make verirun
   

This currently only works under Linux. It uses Terasic's DE2-115 evaluation board.

The following packages must be installed:

1. libusb-1.0
2. Brian Swetland's USB Blaster JTAG tools
3. [Quartus II FPGA design software] (http://www.altera.com/products/software/quartus-ii/web-edition/qts-we-index.html)
4. C/C++ cross compiler toolchain described above https://github.com/jbush001/NyuziToolchain.

1. Build USB blaster command line tools

• Update your PATH environment variable to point the directory where you built the tools.

• Create a file /etc/udev/rules.d/99-custom.rules and add the line (this allows using USB blaster tools without having to be root)

       ATTRS{idVendor}=="09fb" , MODE="0660" , GROUP="plugdev" 
  

2. Build the bitstream (ensure quartus binary directory is in your PATH, by default installed in ~/altera/[version]/quartus/bin/)

    cd rtl/fpga/de2-115
    make
   

3. Make sure the FPGA board is in JTAG mode by setting SW19 to 'RUN'

4. Load the bitstream onto the FPGA (note that this will be lost if the FPGA is powered off).

    make program 
   

5. Load program into memory and execute it using the runit script as below. The script assembles the source and uses the jload command to transfer the program over the USB blaster cable that was used to load the bitstream. jload will automatically reset the processor as a side effect, so the bitstream does not need to be reloaded each time. This test will blink the red LEDs on the dev board in sequence.

   cd ../../../tests/fpga/blinky
   ./runit.sh