Design of Bit Slice Processor based on Reconfigurable Approximate Carry Look-Ahead Adder
Rangeetha S1, Sharmila devi S2, Adline Jancy Y3
1Rangeetha, Assistant Professor, Ramakrishna college of Engineering college, Coimbatore, India.
2Sharmila devi Assistant Professor, Ramakrishna college of Engineering college, Coimbatore, India.
3Adline Jancy Y Assistant Professor, Ramakrishna college of Engineering college, Coimbatore, India.
Manuscript received on 02 October 2019 | Revised Manuscript received on 13 October 2019 | Manuscript Published on 29 June 2020 | PP: 271-275 | Volume-8 Issue-10S2 August 2019 | Retrieval Number: J104808810S19/2019©BEIESP | DOI: 10.35940/ijitee.J1048.08810S19
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A highly efficient approximate addition plays a vital role in arithmetic operations. A special addition mechanism employed in the proposed work consists of both exact and approximate modes of operation suitable for both error tolerant and exact applications. The proposed adder is more area and power efficient compared with other conventional approximate carry look-ahead adders. It is constructed by splitting the input into two parts namely, approximate part and augmenting part. If both produce carry it will be exact output, while the carry produced by approximate part will be imprecise. Based on this mechanism an efficient reconfigurable carry look-ahead adder is designed and applied to a bit-slice processor. Bit slicing is technique to construct a processor by using n-bit CPU. The error rate is also minimized in the proposed technique by 10% compared to existing designs. Compared with conventional approximate adder, the proposed reconfigurable approximate adder produce better results in terms of area and power.
Keywords: Approximate Multiplier, Reconfigurable Approximate Carry Look-Ahead Adder (RAP-CLA), Bit-Slice Processor, Operating Modes.
Scope of the Article: Reconfigurable Computing