Read your Circuit: Leveraging Word Embedding to Guide Logic Optimization.

To tackle the involved complexity, Electronic Design Automation (EDA) tools are broken in well-defined steps, each operating at different abstraction levels. Higher levels of abstraction shorten the flow run-time while sacrificing correlation with the physical circuit implementation. Bridging this gap between Logic Synthesis tool and Physical Design (PnR) tools is key to improve Quality of Results (QoR), while possibly shorting the time-to-market. To address this problem, in this work, we formalize logic paths as sentences, with the gates being a bag of words. Thus, we show how word embedding can be leveraged to represent generic paths and predict if a given path is likely to be critical post-PnR. We present the effectiveness of our approach, with accuracy over than 90% for our test-cases. Finally, we give a step further and introduce an intelligent and non-intrusive flow that uses this information to guide optimization. Our flow presents up to 15.53% area delay product (ADP) and 18.56% power delay product (PDP), compared to a standard flow.