- ApproxFlow is a toolbox for the evaluation of approximate multiliers on DNNs.
- Download the code.
- Dependencies: cmake, g++, openmp
- mkdir build
- cd build
- cmake ..
- make
- ./approxflow
- Run different tests by modifying main.cpp and probably Tests/TestQuantArray0.h.
- You can run testMNIST / testFashionMNIST / testCIFAR10AlexNet functions with various look-up tables of approximate multipliers.
- The look-up tables are put in the Utils folder:
| Multiplier | File Name |
|---|---|
| Wallace Tree | accurate.csv |
| HEAM | LUT_ours.txt |
| KMap[1] | approximate.csv |
| AC[2] | LUT_AC.txt |
| CR(C.6)[3] | LUT_CR(C.6).txt |
| CR(C.7) | LUT_CR(C.7).txt |
| OU(L.1)[4] | LUT_OU(L.1).txt |
| OU(L.3) | LUT_OU(L.3).txt |
| SDLC[5] | LUT_SDLC.txt |
[1] P. Kulkarni, P. Gupta, and M. Ercegovac. Trading Accuracy for Power with an Underdesigned Multiplier Architecture. 2011 24th Internatioal Conference on VLSI Design, 2011.
[2] A. Momeni, J. Han, P. Montuschi, and F. Lombardi. Design and Analysis of Approximate Compressors for Multiplication. IEEE Transactions on Computers, 2015.
[3] C. Liu, J. Han, and F. Lombardi. A low-power, high-performance approximate multiplier with configurable partial error recovery. Design, Automation and Test in Europe Conference and Exhibition (DATE), 2014.
[4] C. Chen et al. Optimally Approximated and Unbiased Floating-Point Multiplier with Runtime Configurability. Proceedings of the 39th International Conference on Computer-Aided Desig. 2020.
[5] I. Qiqieh, R. Shafik, G. Tarawneh, D. Sokolov, and A. Yakovlev, "Energy-efficient approximate multiplier design using bit significance-driven logic compression," in Design, Automation and Test in Europe Conference Exhibition (DATE), 2017.