Novel BCD adders and their reversible logic implementation for IEEE 754r format

Himanshu Thapliyal, Saurabh Kotiyal, M. B. Srinivas

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

58 Scopus citations

Abstract

IEEE 754r is the ongoing revision to the IEEE 754 floating point standard and a major enhancement to the standard is the addition of decimal format. This paper proposes two novel BCD adders called carry skip and carry look-ahead BCD adders respectively. Furthermore, in the recent years, reversible logic has emerged as a promising technology having its applications in low power CMOS, quantum computing, nanotechnology, and optical computing. It is not possible to realize quantum computing without reversible logic. Thus, this paper also paper provides the reversible logic implementation of the conventional BCD adder as the well as the proposed Carry Skip BCD adder using a recently proposed TSG gate. Furthermore, a new reversible gate called TS-3 is also being proposed and it has been shown that the proposed reversible logic implementation of the BCD Adders is much better compared to recently proposed one, in terms of number of reversible gates used and garbage outputs produced. The reversible BCD circuits designed and proposed here form the basis of the decimal ALU of a primitive quantum CPU.

Original languageEnglish
Title of host publicationProceedings - 19th International Conference on VLSI Design held jointly with 5th International Conference on Embedded Systems Design
Pages387-392
Number of pages6
DOIs
StatePublished - 2006
Event19th International Conference on VLSI Design held jointly with 5th International Conference on Embedded Systems Design - Hyderabad, India
Duration: Jan 3 2006Jan 7 2006

Publication series

NameProceedings of the IEEE International Conference on VLSI Design
Volume2006
ISSN (Print)1063-9667

Conference

Conference19th International Conference on VLSI Design held jointly with 5th International Conference on Embedded Systems Design
Country/TerritoryIndia
CityHyderabad
Period1/3/061/7/06

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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