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Arm enables custom instructions for embedded CPUs

[2019.10.08, Tue 17:05] Arm has enabled custom instructions for embedded centralized processing units to give chip makers more flexibility in a changing world. The new custom instructions will enable partners - who license the Arm architecture and design their own chips - to differentiate their system-on-chip products from other chip makers for embedded and internet of things applications. Arm has architected a way to support intelligent and rapid development of fully integrated custom CPU instructions without software fragmentation, the company said. Arm custom instructions will initially be implemented in Arm Cortex-M33 CPUs starting in the first half of 2020 at no additional cost to new and existing licensees, enabling SoC designers to add their own instructions for specific embedded and IoT. "A world of a trillion secure intelligent devices will be built on a diversity of complex use cases requiring increased synergy between hardware and software design," said Dipti Vachani, senior vice president of the automotive and IoT line of business at Arm, in a statement. Arm custom instructions are part of the evolution of the Armv8-M architecture with secure Arm TrustZone technology. Arm says these instructions treat the CPU as a chassis for Arm silicon partner innovation. Arm custom instructions are enabled by modifications to the CPU that reserve encoding space for designers to easily add custom datapath extensions while maintaining the integrity of the existing software ecosystem.
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