alt Hacker NewsThis. SiFive, for example, is a proprietory core design based on the open source RISC V spec. Hazard3 [0] on the other hand, is an open source core design.
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disdi • last Thursday at 5:26 AM
Another opensource is https://github.com/SpinalHDL/VexRiscv
Another opensource core design is XiangShan https://xiangshan.cc/en/