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This paper presents a reconfigurable functional unit (RFU) for an adaptive dynamic extensible processor. The processor can tune its extended instructions to the target applications, after chip-fabrica...tion. The custom instructions (CIs) are generated deploying the hot basic blocks during the training mode. In the normal mode, CIs are executed on the RFU. A quantitative approach was used for designing the RFU. The RFU is a matrix of functional units with 8 inputs and 6 outputs. Performance is enhanced up to 1.25 using the proposed RFU for 22 applications of Mibench. This processor needs no extra opcodes for CIs, new compiler, source code modification and recompilation.続きを見る
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