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You cannot sell a ARM processor that implements custom instructions. Or more properly to sell* ARM processors (or devices with ARM processors) you need a licen
by afiori 4y ago
You cannot sell a ARM processor that implements custom instructions.
Or more properly to sell* ARM processors (or devices with ARM processors) you need a license from ARM where they give you permissions and (unless you are Apple) ARM is not going to give you a license where custom instructions are not forbidden.
RISC-V is open in the sense that you do not need permission from the IP owner to use it.
* I believe that you probably can manufacture custom ARM processors without a if you never plan to sell them.
- klelatti 4y agoI think its possible that you could sell this processor but that you can't sell it as an Arm processor - in the recent Arm / Qualcomm case Arm seemed to rely heavily on trademark infringement rather than Qualcomm infringing their IP wrt the ISA. Happy to be corrected though if I've got this wrong.
- CalChris 4y ago> You cannot sell a ARM processor that implements custom instructions. That was the case if you are an ARM architecture licensee. And of late, that's not even the case anymore. https://www.arm.com/technologies/custom-instructions https://www.arm.com/technologies/custom-instructions