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Providing support for Alveo boards

Javier Duarte requested to merge github/fork/selwyn96/Alveo_backend_u250 into master

Created by: selwyn96

This PR provides backend support for Alveo boards (U50, U200, U250 and U280) by leveraging the VivadoAccelerator backend. Reference: https://github.com/fastmachinelearning/hls4ml/issues/496.

Changes:

In hls4ml/templates/vivado_accelerator/alveo Added RTL files which act as AXI stream to AXI master adapter for the Alveo boards. The axi-stream tcl scripts for all boards. The python drivers.

In /hls4ml/backends/vivado_accelerator/vivado_accelerator_backend.py Added a make_xclbin function that generates the xclbin container by linking the project and object files.

Tests

Modified the test/hls4ml-keras-test.sh script to test the functionality of the branch. A more comprehensive tutorial for training and deploying on the Alveo boards can be found at https://github.com/selwyn96/Alveo-tutorial

Slides

(https://docs.google.com/presentation/d/1D9tryRyFp6kSb2ytc8kBLJ-El4CB_giDGnOQ2lFuLzs/edit?usp=sharing)

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