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Arm's case isn't about the ISA, it's about use of IP developed by Nuvia with help from Arm under Nuvia's Arm license being used in a way that isn't compatible w

Arm's case isn't about the ISA, it's about use of IP developed by Nuvia with help from Arm under Nuvia's Arm license being used in a way that isn't compatible with the terms of Nuvia's license. IANAL but I'd be astonished if they get away with that IP making its way into RISC-V designs, if Arm win. Plus, they won't have anything RISC-V based available in anywhere near the required timescales. They're still arguing about the ISA after all!

hajile 3y ago
ARM's case is that a uarch is necessarily tied to its ISA and that their license isn't transferrable because the contract plainly says so. If Qualcomm can show up and say "here's our uarch running a different ISA", it disproves that point and at most leaves dispute about some patents where Qualcomm can probably get a quick settlement for far less than the royalties would cost them. The whole point of Znew is to transform RISC-V into something so similar to ARM64 that they can swap out the decoder and be good to go.