What is a list of all softcores that were designed purely using VHDL?

This page summarizes the projects mentioned and recommended in the original post on /r/FPGA

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  • microwatt

    A tiny Open POWER ISA softcore written in VHDL 2008

    My knee-jerk reaction was "No" since it's IBM POWER. But then I read that the POWER architecture and ISA support bi-endian, and then I also gather from https://github.com/antonblanchard/microwatt/search?p=1&q=endian that the microwatt starts up in little-endian (LE) mode. In addition, the examples are compiled for LE mode: https://github.com/antonblanchard/microwatt/blob/e40e752b9ab602f5ce1eb79be1fe96932558830d/hello_world/Makefile#L12

  • riscv_vhdl

    Portable RISC-V System-on-Chip implementation: RTL, debugger and simulators

  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  • lxp32-cpu

    A lightweight, open source and FPGA-friendly 32-bit CPU core based on an original instruction set

    I used this one https://github.com/lxp32/lxp32-cpu as base for building a RISC-V softcore.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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