RosaicLabs, Atom RTL, and 32-Tile AMX: Trying to Piece Together a x86 Puzzle

Hello you fine Internet folks,

Today we are talking about one of the stranger x86 stories I have seen in a while. According to both SemiAccurate and Reuters, Intel is giving a new startup called RosaicLabs access to the register transfer language code for its Atom CPU technology. That is already a massive departure for a company that has historically guarded both its x86 license and CPU-core RTL very closely.

Two days before Reuters published its story, however, Phoronix spotted a very weird post on the Linux kernel mailing list. The post describes working x86 implementations with 16 and 32 Advanced Matrix Extension (AMX) tile registers, compared with eight tiles on Intel’s shipping AMX implementations. It was written by the same developer who said in October 2025 that a “corporate entity…