RISC-V, accelerator pressure leads to customizable Armv8-M instructions
TechCon Microprocessor designer Arm will allow chipmakers licensing its blueprints to, in certain circumstances, alter the holiest of holy scriptures: its CPU instruction set.
Specifically, the Softbank-owned biz will allow customers to add custom software instructions to Armv8-M CPU cores, free of charge, starting with the Cortex-M33 in early 2020.
These are microcontroller-grade RISC processor cores: think small, low-power brains directing sensors, gizmos, robots, appliances, industrial equipment, and so on.
These aren't the beefy general-purpose Armv8-A CPUs running apps and games on your tablet or smartphone.
"This makes sense for Armv8-M and R profile cores, where the software is intimate with the hardware," Arm senior director Thomas Ensergueix told The Register earlier this month.