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TM-1000 is an ideal building block for any multimedia application that requires processing of video, audio, ~aphics, and communica- tions datastreams. It is well suited for applications ranng from single-purpose systems such as videophones, to repro~ammable, multipurpose devices such as set-top boxes or web browsers. TM-1000 easily implements popular multimedia standards such as MPEG-1 and MPEG-2, but its orientation around a powerful, pro- grammable general-purpose CPU makes it capable ofa variety of multimedia algorithms, whether open or proprietary. TM-1000 delivers top performance through its elegant implementa- tion of a fine-g'ain parallel architecture known as very-long instruc- tion word, or VLIW. Unique to the TriMedia processor's VLIW implementation, parallelism is optimized at compile time by the TriMedia compilation system. No specialized scheduling hardware is required to parallelize code during execution. Hardware saved by eliminating complex scheduling logic reduces cost and allows the inte~ation of multimedia-specific features. With the capacity to pack multiple operations into one VLIW instruction and 27 functional units in which to process them, TM-1000 can execute up to five operations in parallel with each clock cycle. Such parallel processing is an ideal complement to the inherently parallel nature of multimedia applications. Another key contributor to TM-lOOO's top performance is its use of conditional execution. During program creation, an instruction scheduler adds conditional code to each operation to enable guarded execution - a technique that increases fine-glain parallelism and significantly decreases code branching and execution time.
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