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Tools and Toolchain
Libero, iCEcube2 and Radiant require a license, free license is available.
It is usually much easier to install the node locked license.
This is the only FPGA tool for Microsemi targets, free silver license can be used
Open source FPGA toolchain supports iCE40, no license needed. Setup maybe complicated as it most likely requires the toolchain to be fully recompiled from sources.
This is free commercial tool, you can get free personal use license (flexlm) keys for 90 days.
RISCV demos are included, running Dhrystone demos out of the box will give
Measured time too small to obtain meaningful results
message - so it seems the out of the box demos are not tested.
Amazing free and open source tool. Easy download, runs out of the box. Support for Microsemi MI-V included.
This is a trick, you can take some known RISCV verilog code, run it through verilator and use the resulting executable as mini Simulator.
Notes:
GCC generates verilog memory files with as bytes, they would most likely load wrong with verilog $readmem, conversion to 32 bit mem file format is possible using python script from picorv32 project hex8tohex32.py