AES S-Box Verilator Testbench

This directory contains a basic, scratch Verilator testbench targeting functional verification of different S-Box implementations during development.

How to build and run the testbench

From the OpenTitan top level execute

fusesoc --cores-root=. run --setup --build lowrisc:dv_verilator:aes_sbox_tb

to build the testbench and afterwards

./build/lowrisc_dv_verilator_aes_sbox_tb_0/default-verilator/Vaes_sbox_tb \
  --trace

to run it.

Details of the testbench

• rtl/aes_sbox_tb.sv: SystemVerilog testbench, instantiates and drives the different S-Box implementations, compares outputs, signals test end and result (pass/fail) to C++ via output ports.
• cpp/aes_sbox_tb.cc: Contains main function and instantiation of SimCtrl, reads output ports of DUT and signals simulation termination to Verilator.