Calyx Posit Evaluation

This repository contains the code for evaluating the Calyx binding of the Chisel HardPosit units.

We created a fork of Dahlia which emits Posit 32 units when floats are used. The following benchmarks from the Machsuite are rewritten in Dahlia.

1. FFT Strided
2. SPMV CRS
3. SPMV ELLPACK
4. Viterbi

Instructions to run the benchmarks

# Build the fork of Dahlia
git clone https://github.com/Mark1626/dahlia.git
pushd dahlia
git checkout float-support
sbt assembly
popd

# Generate the hardposit blocks
# Refer to https://github.com/thoughtworks/hardposit-chisel3/blob/master/lib/README.md
git clone https://github.com/thoughtworks/hardposit-chisel3.git
pushd hardposit-chisel3
sbt run gen P32 full
cd lib
# Generate a single SV file from each module
make
popd

# Add the compiled Posit units within calyx
git clone https://github.com/cucapra/calyx.git
pushd calyx
cp ../hardposit-chisel3/lib/*.sv .
cp ../hardposit-chisel3/lib/*.futil .
fud config --create global.root $PWD
popd

# Clone and run the benchmarks
git clone https://github.com/dic-case-studies/calyx-posit-evaluation
cd calyx-posit-evaluation

# Install the utilities
pushd utilities/python; pip3 install -e .; popd
pushd utilities/cpp; cmake -B ./build/ -S .; make -C build; popd

# Run the benchmarks
make all

Results

1. FFT Strided

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2. SPMV CRS

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3. SPMV ELLPACK

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Acknowledgement

This work was done by

1. M. Nimalan
2. Swethaa. A
3. Addhanki Venkata Sai Veera Manikanta
4. Maneesh Sutar

The benchmarks are from MachSuite. The following paper describes the MachSuite benchmarks:

Brandon Reagen, Robert Adolf, Sophia Yakun Shao, Gu-Yeon Wei, and David Brooks. "MachSuite: Benchmarks for Accelerator Design and Customized Architectures." 2014 IEEE International Symposium on Workload Characterization.