Patmos is a time-predictable VLIW processor. Patmos is the processor for the T-CREST project. See also: http://www.t-crest.org/ and http://patmos.compute.dtu.dk/
The Patmos Reference Handbook contains build instructions in Section 5.
For questions and discussions join the Patmos mailing list at: https://groups.yahoo.com/group/patmos-processor/
Several packages need to be installed. The following apt-get lists the packages that need to be installed on a Ubuntu Linux:
sudo apt-get install git default-jdk gitk cmake make g++ texinfo flex bison \
subversion libelf-dev graphviz libboost-dev libboost-program-options-dev ruby-full \
liblpsolve55-dev python zlib1g-dev gtkwave gtkterm scala
On a restricted machine (e.g. Cloud9) the bare minimum is:
sudo apt-get install default-jdk git cmake make g++ texinfo flex bison \
subversion libelf-dev graphviz libboost-dev libboost-program-options-dev ruby-full \
python zlib1g-dev
Install sbt with:
echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 \
--recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823
sudo apt-get update
sudo apt-get install sbt
We assume that the T-CREST project will live in $HOME/t-crest. Before building the compiler, add the path to the compiler executables into your .bashrc or .profile:
export PATH=$PATH:$HOME/t-crest/local/bin
Use an absolute path as LLVM cannot handle a path relative to the home directory (~).
Patmos and the compiler can be checked out from GitHub and are built as follows:
mkdir ~/t-crest
cd ~/t-crest
git clone https://github.com/t-crest/patmos-misc.git misc
./misc/build.sh
For developers with push permission the ssh based clone string is:
git clone git@github.com:t-crest/patmos-misc.git misc
build.sh will checkout several other repositories (the compiler, library, and the Patmos source) and build the compiler and the Patmos simulator. Therefore, take a cup of coffee and find some nice reading (e.g., the Patmos Reference Handbook).
We can start with the standard, harmless looking Hello World:
main() {
printf("Hello Patmos!\n");
}
With the compiler installed it can be compiled to a Patmos executable and run with the simulator as follows:
patmos-clang hello.c
pasim a.out
However, this innocent examples is quiet challenging for an embedded system. For further details and how to build Patmos for an FPGA see Section 6 in the Patmos Reference Handbook.
You can also build the Patmos handbook yourself from the source. You first need to install LaTeX (about 3 GB) with:
sudo apt-get install texlive-full doxygen
The handbook is then built with:
cd patmos/doc
make
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patmos-llvmcurrently does not compile with clang > 3.4 on Ubuntu 15.04. As a workaround, uninstallclang, installclang-3.4and create symlinksclangandclang++toclang-3.4andclang++-3.4.