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When quoting this document, please refer to the following
DOI: 10.4230/OASIcs.WCET.2006.669
URN: urn:nbn:de:0030-drops-6694
URL: http://drops.dagstuhl.de/opus/volltexte/2006/669/
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Kirner, Raimund ; Grössing, Markus ; Puschner, Peter
Tightening WCET Bounds

Comparing WCET and Resource Demands of Trigonometric Functions Implemented as Iterative Calculations vs. Table-Lookup

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Abstract

Trigonometric functions are often needed in embedded real-time software. To fulfill concrete resource demands, different implementation strategies of trigonometric functions are possible. In this paper we analyze the resource demands of iterative calculations compared to other implementation strategies, using the trigonometric functions as a case study. By analyzing the worst-case execution time (WCET) of the different calculation techniques of trigonometric functions we got the surprising result that the WCET of iterative calculations is quite competitive to alternative calculation techniques, while their economics on memory demand is far superior. Finally, a discussion of the general applicability of the obtained results is given as a design guide for embedded software.

BibTeX - Entry

@InProceedings{kirner_et_al:OASIcs:2006:669,
  author =	{Raimund Kirner and Markus Gr{\"o}ssing and Peter Puschner},
  title =	{{Comparing WCET and Resource Demands of Trigonometric Functions Implemented as Iterative Calculations vs. Table-Lookup}},
  booktitle =	{6th International Workshop on Worst-Case Execution Time Analysis (WCET'06)},
  series =	{OpenAccess Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-03-3},
  ISSN =	{2190-6807},
  year =	{2006},
  volume =	{4},
  editor =	{Frank Mueller},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2006/669},
  URN =		{urn:nbn:de:0030-drops-6694},
  doi =		{http://dx.doi.org/10.4230/OASIcs.WCET.2006.669},
  annote =	{Keywords: Worst-case execution time, WCET analysis, table lookup, iterative computation, Taylor series, resource demands }
}

Keywords: Worst-case execution time, WCET analysis, table lookup, iterative computation, Taylor series, resource demands
Seminar: 6th International Workshop on Worst-Case Execution Time Analysis (WCET'06)
Issue Date: 2006
Date of publication: 23.08.2006


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