Reconfigurable Multiple Operation Array

Abstract

AbstractIn this paper, we investigate the collapsing of eight multi-operand addition related operations into a single and common (3:2) counter array. We consider for this unit multiplication in integer and fractional representations, the Sum of Absolute Differences (SAD) in unsigned, signed magnitude and two’s complement notation. Furthermore, the unit also incorporates a Multiply-Accumulation unit (MAC) for two’s complement notation. The proposed multiple operation unit was constructed around 10 element arrays that can be reduced using well known counter techniques, which are feed with the necessary data to perform the proposed eight operations. It is estimated that 6/8 of the basic (3:2) counter array is shared by the operations. The obtained results of the presented unit indicates that is capable of processing a 4x4 SAD macro-block in 36.35 ns and takes 30.43 ns to process the rest of the operations using a VIRTEX II PRO xc2vp100-7ff1696 FPGA device.KeywordsMotion EstimationLogic BlockFPGA DeviceCounter ArrayComplement NotationThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.