This book constitutes the refereed proceedings of the 4th International Workshop on Systems, Architectures, Modeling, and Simulation, SAMOS 2004, held in Samos, Greece on July 2004. Besides the SAMOS 2004 proceedings, the book also presents 19 revised papers from the predecessor workshop SAMOS 2003.

SAMOS III – Reconfigurable Computing.- The Molen Programming Paradigm.- Loading ??-Code: Design Considerations.- RAMPASS: Reconfigurable and Advanced Multi-processing Architecture for Future Silicon Systems.- Basic OS Support for Distributed Reconfigurable Hardware.- A Cost-Efficient RISC Processor Platform for Real Time Audio Applications.- Customising Processors: Design-Time and Run-Time Opportunities.- Intermediate Level Components for Reconfigurable Platforms.- Performance Estimation of Streaming Media Applications for Reconfigurable Platforms.- SAMOS III – Architectures and Implementation.- CoDeL: Automatically Synthesizing Network Interface Controllers.- Performance and Power Evaluation of Clustered VLIW Processors with Wide Functional Units.- An Optimized Flow for Designing High-Speed, Large-Scale CMOS ASIC SoCs.- Register-Based Permutation Networks for Stride Permutations.- A Family of Accelerators for Matrix-Vector Arithmetics Based on High-Radix Multiplier Structures.- Metrics for Digital Signal Processing Architectures Characterization: Remanence and Scalability.- Virtual Architecture Mapping: A SystemC Based Methodology for Architectural Exploration of System-on-Chip Designs.- SAMOS III – Compilers, System Modeling, and Simulation.- Comparison of Data Dependence Analysis Tests.- MOUSE: A Shortcut from Matlab Source to SIMD DSP Assembly Code.- High-Level Energy Estimation for ARM-Based SOCs.- IDF Models for Trace Transformations: A Case Study in Computational Refinement.- Systems, Architectures, Modeling, and Simulation 2004 (SAMOS IV).- Programming Extremely Flexible Platforms.- SAMOS IV – Reconfigurable Computing.- The Virtex II ProTM MOLEN Processor.- Reconfigurable Hardware for a Scalable Wavelet Video Decoder and Its Performance Requirements.-Design Space Exploration for Configurable Architectures and the Role of Modeling, High-Level Program Analysis and Learning Techniques.- Modeling Loop Unrolling: Approaches and Open Issues.- Self-loop Pipelining and Reconfigurable Dataflow Arrays.- Architecture Exploration for 3G Telephony Applications Using a Hardware–Software Prototyping Platform.- Embedded Context Aware Hardware Component Generation for Dataflow System Exploration.- On the (Re-)Use of IP-Components in Re-configurable Platforms.- Customising Hardware Designs for Elliptic Curve Cryptography.- Dynamic Hardware Reconfigurations: Performance Impact for MPEG2.- Compiler and System Techniques for soc Distributed Reconfigurable Accelerators.- SAMOS IV – Architectures and Implementation.- Design Space Exploration with Automatic Selection of SW and HW for Embedded Applications.- On Enhancing SIMD-Controlled DSPs for Performing Recursive Filtering.- Memory Bandwidth Requirements of Tile-Based Rendering.- Using CoDeL to Rapidly Prototype Network Processsor Extensions.- Synchronous Transfer Architecture (STA).- Generated DSP Cores for Implementation of an OFDM Communication System.- A Novel Data-Path for Accelerating DSP Kernels.- Scalable FFT Processors and Pipelined Butterfly Units.- Scalable Instruction-Level Parallelism.- A Low-Power Multithreaded Processor for Baseband Communication Systems.- Initial Evaluation of Multimedia Extensions on VLIW Architectures.- HIBI v.2 Communication Network for System-on-Chip.- SAMOS IV – System Modeling, and Simulation.- DIF: An Interchange Format for Dataflow-Based Design Tools.- Scalable and Modular Scheduling.- Early ISS Integration into Network-on-Chip Designs.- Cycle Accurate Simulation Model Generation for SoC Prototyping.- Modeling Instruction Semantics in ADLProcessor Descriptions for C Compiler Retargeting.- A Communication-Centric Design Flow for HIBI-Based SoCs.- Performance Analysis of SoC Communication by Application of Deterministic and Stochastic Petri Nets.- Communication Optimization in Compaan Process Networks.- Analysis of Dataflow Programs with Interval-Limited Data-Rates.- High-Speed Event-Driven RTL Compiled Simulation.- A High-Level Programming Paradigm for SystemC.- Power, Performance and Area Exploration for Data Memory Assignment of Multimedia Applications.- Constraints Derivation and Propagation for Large-Scale Embedded Systems Exploration.

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