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arXiv 2008.11591cs.AR
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一种近似进位估计的校正同时加法器

An Approximate Carry Estimating Simultaneous Adder with Rectification

Rajat Bhattacharjya, Vishesh Mishra, Saurabh Singh, Kaustav Goswami, Dip Sankar Banerjee

摘要:

最近,近似计算在降低算术运算的功率、面积和时间要求方面得到了重要的应用。近年来所做的一些工作进一步沿着这些方向的近似计算。在这项工作中,我们提出了一个新的近似加法器,采用进位预测方法。这允许进位的并行传播,从而允许更快的计算。除了基本的加法器设计,我们还提出了一个整流逻辑,这将使更大的计算精度更高。实验结果表明,我们的加法器产生的结果比传统的纹波进位加法器快91.2%。在精度方面,在基本设计中增加整流逻辑,产生的结果比SARA和BCSA等最先进的加法器精度高74%。

英文摘要:

Approximate computing has in recent times found significant applications towards lowering power, area, and time requirements for arithmetic operations. Several works done in recent years have furthered approximate computing along these directions. In this work, we propose a new approximate adder that employs a carry prediction method. This allows parallel propagation of the carry allowing faster calculations. In addition to the basic adder design, we also propose a rectification logic which would enable higher accuracy for larger computations. Experimental results show that our adder produces results 91.2% faster than the conventional ripple-carry adder. In terms of accuracy, the addition of rectification logic to the basic design produces results that are more accurate than state-of-the-art adders like SARA and BCSA by 74%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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