June 9, 2019
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Article

Floating-Point Exponentiation Units for Reconfigurable Computing

Publicated to: ACM Transactions on Reconfigurable Technology and Systems. 6 (1): 4- - 2013-05-01 6(1), DOI: 10.1145/2457443.2457447

Authors:

de Dinechin, F; Echeverría, P; López-Vallejo, M; Pasca, B
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Affiliations

Ecole Normale Super Lyon, Lyon, France - Author
Univ Politecn Madrid, E-28040 Madrid, Spain - Author

Abstract

The high performance and capacity of current FPGAs makes them suitable as acceleration co-processors. This article studies the implementation, for such accelerators, of the floating-point power function x(y) as defined by the C99 and IEEE 754-2008 standards, generalized here to arbitrary exponent and mantissa sizes. Last-bit accuracy at the smallest possible cost is obtained thanks to a careful study of the various subcomponents: a floating-point logarithm, a modified floating-point exponential, and a truncated floating-point multiplier. A parameterized architecture generator in the open-source FloPoCo project is presented in details and evaluated.
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Keywords

AlgorithmsDesignDouble-precisionExponentiation unitFloating-pointFpgasHardwareImplementationLogarithmPerformancePower functionReconfigurable computing

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal ACM Transactions on Reconfigurable Technology and Systems due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2013, it was in position , thus managing to position itself as a Q2 (Segundo Cuartil), in the category Computer Science (Miscellaneous). Notably, the journal is positioned en el Cuartil Q4 for the agency WoS (JCR) in the category Computer Science, Hardware & Architecture.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations from Scopus Elsevier, it yields a value for the Field-Weighted Citation Impact from the Scopus agency: 1.23, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 13, 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2026-04-27, the following number of citations:

  • WoS: 11
  • Scopus: 13
  • Google Scholar: 20
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-27:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 7.

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 3.

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/29552/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 455
  • Downloads: 826
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Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: France.

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