Coarse-Grained Reconfigurable Architecture: Taxonomy, Challenges, and Applications

This article provides an extensive review of Coarse-Grained Reconfigurable Architectures (CGRAs), which bridge the gap between flexible software and efficient hardware. The authors propose a novel multidimensional taxonomy that categorizes these systems based on their programming, computation, and execution models. By analyzing the evolution of these architectures, the text identifies critical challenges regarding programmability, productivity, and adaptability in modern computing. It specifically addresses the "memory wall" and the difficulties of implementing speculative parallelism within spatial arrays. To overcome these hurdles, the paper suggests a shift toward programming-driven design and virtualization to simplify development. Ultimately, the research explores the future of CGRAs as specialized accelerators for data-intensive domains such as deep learning and security