Abstract
A multi-mode circuit implements the functionality of a limited number of circuits, called modes, of which at any given time only one needs to be realised. Using run-time reconfiguration of an FPGA, all the modes can be implemented on the same reconfigurable region, requiring only an area that can contain the biggest mode. Typically, conventional run-time reconfiguration techniques generate a configuration for every mode separately. To switch between modes the complete reconfigurable region is rewritten, which often leads to very long reconfiguration times. In this paper we present a novel, fully automated tool flow that exploits similarities between the modes and uses Dynamic Circuit Specialization to drastically reduce reconfiguration time. Experimental results show that the number of bits that is rewritten in the configuration memory reduces with a factor from 4.6× to 5.1× without significant performance penalties. © 2013 EDAA.

Abstract
This chapter describes the CoSy1-based [1, 2] compilers developed in the context of the REFLECT project to support its aspect-oriented design-flow. In particular, these CoSy-based compilers are guided by LARA strategies and are responsible for generating code targeting traditional processors, as well as generating behavioral-RTL VHDL code [3] targeting hardware accelerators. Throughout this chapter, these compilers are referred collectively as reflectc, except when a specific compilation flow (with its specific name) is used. We also describe the compiler development extensions to support the REFLECT approach [4] and the weaving process controlled by LARA strategies [5-7] as described in Chap. 3. © Springer Science+Business Media New York 2013. All rights are reserved.

Abstract

Abstract
This chapter presents the most relevant related work with respect to the compilation and synthesis approach developed in the context of the REFLECT project. We survey current techniques and methodologies for the mapping of computations described in high-level programming languages to reconfigurable architectures. We give particular emphasis to compilation systems that map imperative (C-like) languages to target FPGA-based systems. We also describe previous work on compiler optimizations, automated high-level synthesis, and strategies for back-end synthesis, mapping as well as placement and routing. Finally, we include an overview of EU-funded projects relevant to REFLECT. © Springer Science+Business Media New York 2013. All rights are reserved.

Abstract
Source-to-source weaving is a key mechanism in the REFLECT design-flow since it allows the inclusion of application-specific information in the transformed program. In particular, LARA [1, 2] aspects are used to control the design-flow, and to trigger source-to-source code transformations and compilation/synthesis optimizations on a given application. Hence, user knowledge about an application and/or target architecture can be codified as aspects, allowing the original application code to be automatically extended to satisfy non-functional concerns, such as arithmetic precision and performance. © Springer Science+Business Media New York 2013. All rights are reserved.

Abstract
This book provides techniques to tackle the design challenges raised by the increasing diversity and complexity of emerging, heterogeneous architectures for embedded systems. It describes an approach based on techniques from software engineering called aspect-oriented programming, which allow designers to control today's sophisticated design tool chains, while maintaining a single application source code. Readers are introduced to the basic concepts of an aspect-oriented, domain specific language that enables control of a wide range of compilation and synthesis tools in the partitioning and mapping of an application to a heterogeneous (and possibly multi-core) target architecture. Several examples are presented that illustrate the benefits of the approach developed for applications from avionics and digital signal processing. Using the aspect-oriented programming techniques presented in this book, developers can reuse extensive sections of their designs, while preserving the original application source-code, thus promoting developer productivity as well as architecture and performance portability. Describes an aspect-oriented approach for the compilation and synthesis of applications targeting heterogeneous embedded computing architectures. Includes examples using an integrated tool chain for compilation and synthesis. Provides validation and evaluation for targeted reconfigurable heterogeneous architectures. Enables design portability, given changing target devices. Allows developers to maintain a single application source code when targeting multiple architectures. © Springer Science+Business Media New York 2013. All rights are reserved.