OPACT: Optimization of Approximate Compressor Tree for Approximate Multiplier

Folders

Src

All .cpp files of this project;

Header

All .h files of this project;

jsoncpp-1.9.4

Download jsoncpp library (https://github.com/open-source-parsers/jsoncpp)

Verilog

Contains all verilog files (bit_width/OPACT1(2).v, MultiDesignComparison/OPACTDesign1(2,3...).v) synthesized by OPACT in the experimental section of the paper.

Prerequisities

Window or Ubuntu

1. Install the Gurobi 9.5;

2. Download EDA tool yosys (https://yosyshq.net/yosys/download.html) and put the yosys executable file into the same folder of this project's source files;

3. Install Python HDL library MyHDL:

   Download this lib in python

   pip install Myhdl

4. Install the verilog generator:

   Download the source codes of ApproxMult_Myhdl:

   git clone https://github.com/FCHXWH/ApproxMULT_MyHDL.git

5. Install the simulator (option):

   Download the source codes of simulator

   git clone https://github.com/changmg/simulator.git

   Compile

   cd simulator/
   mkdir build
   cd build
   cmake ..
   make -j16
   cd ..

   How to use this simulator (simulation.out -h):
   simulation.out -a exact_multiplier.blif -b approximate_multiplier.blif -f error_report_file_path

Compilation

Include directory

1. your_directory/jsoncpp-1.9.4/include;
2. your_directory/Gurobi/win64/include.

Library directory

1. your_directory/Gurobi/win64/lib;
2. your_directory/jsoncpp-1.9.4/jsonlib.

Linker

1. gurobi_c++mdd2019.lib;
2. gurobi91.lib;
3. jsoncpp.lib.

Configuration in the code

1. Opt_Mode: 0=>AreaOpt; 1=>ErrOpt; 2=>CoOpt;
2. bounds: set the constraint of different metrics under different modes (for example, in AreaOpt mode, set the bound of error);
3. path: set the directory of the downloaded verilog generator.