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Author Nguyen, Trung Duc ♦ Van Meter, Rodney
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword IEEE-754 specification ♦ Reversible circuit ♦ Floating-point arithmetic ♦ Low-power computing ♦ Nano technology ♦ Quantum computing
Abstract Reversible logic has applications in low-power computing and quantum computing. However, there are few existing designs for reversible floating-point adders and none suitable for quantum computation. In this article, we propose a resource-efficient reversible floating-point adder, suitable for binary quantum computation, improving the design of Nachtigal et al. [2011]. Our work focuses on improving the reversible designs of the alignment unit and the normalization unit, which are the most expensive parts. By changing a few elements of the existing algorithm, including the circuit designs of the RLZC (reversible leading zero counter) and converter, we have reduced the cost by about 68%. We also propose quantum designs adapted to use gates from fault-tolerant libraries. The $\textit{KQ}$ for our fault-tolerant design is almost 60 times as expensive as for a 32-bit fixed-point addition. We note that the floating-point representation makes in-place, truly reversible arithmetic impossible, requiring us to retain both inputs, which limits the sustainability of its use for quantum computation.
ISSN 15504832
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-11-01
Publisher Place New York
e-ISSN 15504840
Journal ACM Journal on Emerging Technologies in Computing Systems (JETC)
Volume Number 11
Issue Number 2
Page Count 18
Starting Page 1
Ending Page 18

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Source: ACM Digital Library