Ibex

Small open RISC-V CPU used by OpenTitan.

CPUs and computeSystemVerilogApache-2.0M2 · Simulation-testedupdated 5 days ago

Worth knowing

Warning

Manual review is required.

Facts

From GitHub data, checked October 6, 2026.

Maturity
M2 · Simulation-tested
License
Apache-2.0 · Commercial-friendly
Tests
yes
CI
yes
Formal verification
yes
FuseSoC
yes
Last commit
updated 5 days ago
Stars
2078

The repository contains tests or a testbench. How maturity is assigned

Purpose

Verilator

Boards

No one has confirmed a board run yet.

Add evidence

Sources

How to check it locally
  • Run the upstream simulation/test command from the repository README or CI workflow.
  • Inspect the upstream FuseSoC .core manifest and use it as the integration entrypoint.
  • Try a synthesis smoke run with: Verilator.
Scores and how they are computed

License, tests, CI, formal checks, documentation and activity come from the repository check. Usefulness and learning value are editorial estimates.

Quality84
Verification85
License90
Docs70
Integration55
Usefulness72
Beginner42
Professional85
Confidence40

Similar cores

VexiiRiscv

Checked on GitHub

MIT-licensed RISC-V CPU from SpinalHDL, successor of VexRiscv: RV32/64, optional SV32/SV39 MMU, Linux capable, written in SpinalHDL, generates Verilog.

CPUs and computeSpinalHDL (Scala)MITM2 · Simulation-testedupdated 9 days ago