This directory contains several versions of femtorv32, that I'm using for testing different features and influence on timings:
- testdrive_RV32IM: tachyon core (with two execute cycles) with M extension
- testdrive_RV32IM_simF: M extension, F decoder and simulated FPU (works only with Verilator)
- testdrive_RV32IMF: M and F extensions
I recommend using the other cores instead.