Nuvacore unveils 'Core First' CPU design strategy, developing IP before ISA selection

Nuvacore's 'Core First' Strategy

Nuvacore, a CPU startup founded by Gerard Williams, John Bruno, and Ram Srinivasan, has disclosed its 'Core First' development strategy. This approach involves designing a significant portion of its CPU core IP (WarpCore) before committing to a specific instruction set architecture (ISA).

Traditionally, CPU development begins with a chosen ISA, such as Arm, RISC-V, or x86. While modern processors translate instructions into micro-operations, the ISA still influences architectural decisions like instruction decoding and register handling.

Reversing Traditional CPU Design

Nuvacore's method reverses this traditional process by developing foundational CPU IP independently of ISA constraints. The company compares this to building a car around its engine rather than fitting an engine into an existing platform.

This allows engineers to focus on the core's microarchitecture, optimizing it for performance, power efficiency, and sustained workloads. Nuvacore plans to select an ISA later, based on the requirements of the systems it and its partners intend to build.

Implications for Performance and Efficiency

By prioritizing the core design, Nuvacore aims to achieve better optimization for data centers and AI infrastructure, which are its target applications. The company believes this approach can lead to improved performance and power efficiency for these demanding environments.

While some parts of a CPU, like front-end logic, will eventually need to be ISA-specific, substantial components such as execution units, branch-prediction units, data paths, caches, and memory subsystems can be developed and evaluated independently.