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Demand for mobile video applications is growing today in wireless handheld platforms. Intel® Wireless MMX TM technology has been designed to accelerate mobile multimedia and applications processing in a power efficient manner. Optimizing instruction set architecture is a logical approach towards attaining higher performance in multimedia applications. Wireless MMX technology is a 64-bit Single Instruction Multiple Data, (SIMD), coprocessor for the Intel® XScale® microarchitecture. This paper provides an overview of Wireless MMX technology and the key features of the architecture that specifically enhance the multi-media performance. Tools and techniques for optimization are also described.

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Providing quality mobile video applications in hand-held mobile devices requires increased computational capability. Using Single Instruction Multiple Data (SIMD) techniques to expose and accelerate the data parallelism inherent in video processing increases performance in handheld and wireless systems. The paper introduces a new 64-bit SIMD coprocessor of the Intel R XScale R microarchitecture which is optimized for low-power handheld applications. The architecture blends the SIMD media processing style with the capabilities of the XScale microarchitecture. This paper provides an overview of the architecture, its instruction set, programming model, the pipeline organization and functional units. The paper also describes how key features of architecture improve the performance of video applications as compared to a scalar implementation. The performance and power improvements based upon measured results are analyzed to show how the opportunities of power savings by reducing the frequency and voltage can be realized.