MDX — Molecular Dynamics Accelerator Architecture

MDX is an independently developed, pre-silicon domain-specific accelerator architecture for classical molecular-dynamics workloads. The current MDX-1 baseline explores a multi-tile architecture for nonbonded interaction processing, contribution generation, force accumulation/reduction, and ownership-aware routing and persistence.

The high-level scope of the architecture also encompasses critical aspects of MD computations, including periodic geometry handling, spatial pair selection, Verlet-list reuse and rebuild logic, and explicit lifecycle orchestration.

It is important to emphasize that while MDX is designed for classical MD algorithms, the architecture is intrinsically generalized and is not inherently GROMACS-specific, allowing potential integration with a wide variety of molecular dynamics engines and software ecosystems.

The MDX development methodology relies strictly on a correctness-first paradigm. In hardware accelerator design for scientific computing, silent numerical errors or precision drift can render long-running simulations completely invalid. Therefore, the architecture is being developed with absolute priority on deterministic numerical correctness over speculative performance optimizations.

Each currently modeled correctness domain, from interaction accounting to periodic geometry and lifecycle behavior, is defined through explicit contracts and checked against executable reference models.

The validation strategy uses executable golden/reference models as software correctness oracles for the behaviors defined by each specification. They provide deterministic comparison targets for future implementation work, but they are not timing models or evidence of physical hardware.

Keeping algorithmic correctness contracts separate from future RTL allows later implementations to be checked against explicit reference behavior without implying that RTL or silicon has already been validated.