Open-Source RISC-V Architecture IDs ======================================== Every RISC-V hart provides an marchid CSR that encodes its base microarchitecture. Any hart may report an architecture ID of 0, indicating unspecified origin. Commercial implementations (those with nonzero mvendorid) may encode any value in marchid with the most-significant bit set, with the low-order bits formatted in a vendor-specific manner. Open-source implementations (which may or may not have a nonzero mvendorid) have the most-significant bit clear, with a globally unique pattern in the low-order bits. This document contains the canonical list of open-source RISC-V implementations and their architecture IDs. Open-source project maintainers may make pull requests against this repository to request the allocation of an architecture ID. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Project Name | Maintainers | Point of Contact | Architecture ID | Project URL ------------- | ------------------------------- | ----------------------------------------------------------- | ----------------- | --------------------------------------------------- Rocket | SiFive, UC Berkeley | [Andrew Waterman](mailto:andrew@sifive.com), SiFive | 1 | https://github.com/chipsalliance/rocket-chip BOOM | UC Berkeley | [Christopher Celio](mailto:celio@berkeley.edu) | 2 | https://github.com/riscv-boom/riscv-boom CVA6 | OpenHW Group | [Florian Zaruba](mailto:florian@openhwgroup.org), OpenHW Group | 3 | https://github.com/openhwgroup/cva6 CV32E40P | OpenHW Group | [Davide Schiavone](mailto:davide@openhwgroup.org), OpenHW Group | 4 | https://github.com/openhwgroup/cv32e40p Spike | SiFive, UC Berkeley | [Andrew Waterman](mailto:andrew@sifive.com), SiFive | 5 | https://github.com/riscv/riscv-isa-sim E-Class | IIT Madras | [Neel Gala](mailto:neelgala@gmail.com) | 6 | https://gitlab.com/shaktiproject/cores/e-class ORCA | VectorBlox | [Joel Vandergriendt](mailto:joel@vectorblox.com) | 7 | https://github.com/vectorblox/orca SCR1 | Syntacore | [Dmitri Pavlov](mailto:dmitri.pavlov@syntacore.com), Syntacore| 8 | https://github.com/syntacore/scr1 YARVI | Tommy Thorn's Priceless Services| [Tommy Thorn](mailto:tommy-github2@thorn.ws) | 9 | https://github.com/tommythorn/yarvi RVBS | Alexandre Joannou, University of Cambridge| [Alexandre Joannou](mailto:aj443@cl.cam.ac.uk) | 10 | https://github.com/CTSRD-CHERI/RVBS SweRV EH1 | Western Digital Corporation | [Thomas Wicki](mailto:Thomas.Wicki@wdc.com) | 11 | https://github.com/chipsalliance/Cores-SweRV MSCC | Rongcui Dong | [Rongcui Dong](mailto:rongcuid@outlook.com) | 12 | https://github.com/rongcuid/MSCC BlackParrot | The World | [Michael B. Taylor](mailto:prof.taylor@gmail.com), U. Washington | 13 | https://github.com/black-parrot BaseJump Manycore | U. Washington | [Michael B. Taylor](mailto:prof.taylor@gmail.com), U. Washington | 14 | https://github.com/bespoke-silicon-group/bsg_manycore C-Class | IIT Madras | [Neel Gala](mailto:neelgala@gmail.com) | 15 | https://gitlab.com/shaktiproject/cores/c-class SweRV EL2 | Western Digital Corporation | [Thomas Wicki](mailto:Thomas.Wicki@wdc.com) | 16 | https://github.com/chipsalliance/Cores-SweRV-EL2 SweRV EH2 | Western Digital Corporation | [Thomas Wicki](mailto:Thomas.Wicki@wdc.com) | 17 | https://github.com/chipsalliance/Cores-SweRV-EH2 SERV | Olof Kindgren Enterprises | [Olof Kindgren](mailto:olof.kindgren@gmail.com) | 18 | https://github.com/olofk/serv NEORV32 | Stephan Nolting | [Stephan Nolting](mailto:stnolting@gmail.com) | 19 | https://github.com/stnolting/neorv32 CV32E40X | OpenHW Group | [Arjan Bink](mailto:arjan.bink@silabs.com), Silicon Laboratories | 20 | https://github.com/openhwgroup/cv32e40x CV32E40S | OpenHW Group | [Arjan Bink](mailto:arjan.bink@silabs.com), Silicon Laboratories | 21 | https://github.com/openhwgroup/cv32e40s Ibex | lowRISC | [lowRISC Hardware Team](mailto:hardware@lowrisc.org) | 22 | https://github.com/lowRISC/ibex RudolV | Jörg Mische | [Jörg Mische](mailto:bobbl@gmx.de) | 23 | https://github.com/bobbl/rudolv Steel Core | Rafael Calcada | [Rafael Calcada](mailto:rafaelcalcada@gmail.com) | 24 | https://github.com/rafaelcalcada/steel-core XiangShan | ICT, CAS | [XiangShan Team](mailto:xiangshan-all@ict.ac.cn) | 25 | https://github.com/OpenXiangShan/XiangShan Hummingbirdv2 E203 | Nuclei System Technology | [Can Hu](mailto:canhu@nucleisys.com), Nuclei System Technology | 26 | https://github.com/riscv-mcu/e203_hbirdv2 Hazard3 | Luke Wren | [Luke Wren](mailto:wren6991@gmail.com) | 27 | https://github.com/wren6991/hazard3 CV32E41P | OpenHW Group | [Mark Hill](mailto:mark.hill@huawei.com), OpenHW Group | 28 | https://github.com/openhwgroup/cv32e41p Rift | Jianhu Lab, WUT | [Ruige Lee](mailto:295054118@whut.edu.cn) | 29 | [RiftCore](https://github.com/whutddk/RiftCore), [Rift2Core](https://github.com/whutddk/Rift2Core) RISu064 | Wenting Zhang | [Wenting Zhang](mailto:zephray@outlook.com) | 30 | https://github.com/zephray/RISu064 AIRISC | Fraunhofer IMS | [AIRISC Support](mailto:airisc@ims.fraunhofer.de) | 31 | https://github.com/Fraunhofer-IMS/airisc_core_complex Proteus | imec-DistriNet, KU Leuven | [Marton Bognar](mailto:marton.bognar@kuleuven.be) | 32 | https://github.com/proteus-core/proteus VexRiscv | SpinalHDL | [Charles Papon](mailto:charles.papon.90@gmail.com) | 33 | https://github.com/SpinalHDL/VexRiscv