當一個開發平台具有多種處理器，而在系統開設計者就必須花費較多的心思在手動分割程式的工作上，這樣不僅會影響到此嵌入式系統設計的複雜度以及方便性，手動的分割軟體行為，還會因為缺少編譯器的分析，而導致手動分配工作不當而造成效能衰退。當缺少軟體分割工具時，這樣的分割行為工作，就只能交給具備相當的程式開發經驗者，否則整個架構的效能可能會受到極大的影響。
當系統設計有系統合成的工具的分析以及編譯器效能指導注釋程式語言，在一個多核心嵌入式系統的設計上，可以軟體硬體相輔相成，產生更高效能低功率的硬體以及軟體。
我們在應用程式上面加入我們訂立的編譯器效能指導注釋程式語言MDI(Multi-DSPInterface)，除了原本編譯器所分析出來的分析資訊，我們提供了讓系統設計者可以經由MDI得到更多的硬體探索資訊，除了編譯器的最佳化外，也可以得到更效率的硬體設計。

In today’s media-rich environment, the processing of audio/video and multimedia image information becomes essential for any consumer product. Aiming at highperformance, power-efficiency, high-flexibility, and low-cost, many embedded systems employ programmable Digital Signal Processor s (DSPs) as their core components to
construct dataflow-centric, concurrent, and computation-intensive architectures. It’s common to see employing multi-core heterogeneous DSP processors as hardware solutions for embedded and SOC systems with high-throughput streamed-data processing and arithmetic-intensive computing. Traditional DSP compilers usually yield poorquality object codes. Lack of an insight into the DSP architecture and the specific semantics of DSP applications, a compiler would have troubles selecting appropriatly special instructions to exploit advanced hardware features. Those compilers cannot automatically discover the best ways to utilize the specific architecture features and to unleash proper optimized code composed of custom-built instructions for DSP operations without intervening from the programmers. Hence, there is a
demand for effective methods to guide the compilation and optimizations of DSP programs. The issues of software portability and optimization in multi-core SOCs with DSPs are further crucial than ever. MDI, an annotation language as compiler directive extension of standard C/C++, is proposed to incorporate the ideas of DSP specific computing, multi-core deployment, and streamed data parallel programming into the portable C program developments for the optimizations in compilers and
other toolkits. Our approach is to employ DSP-specific semantic descriptions and multi-core deployment indications to be annotated on top of high-level languages by programmers. This information can be picked up by compilers, system designers and other development toolkits to perform processor optimizations. All annotations are categorized into five types;Environment Description, Target Specification, Data Storage Characterization, Operation Intention and Computation-Flow Commentary. We present a complete MDI specification in this thesis.

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