LGraph: A Unified Data Model and API for Productive Open-Source Hardware Design

We present LGraph, a unified data model and API for productive open-source hardware design. It is inspired by live incremental synthesis and aims to provide a fast infrastructure for a productive hardware development flow. In this paper, LGraph is described both from the perspective of a hardware designer as well as an EDA software developer. Key features of LGraph include a unified data model and API, a fast memory mapped library design, integration with third-party tools and hierarchical design traversal for third-party tools such as OpenTimer, Mockturtle and ABC.