Farfel swMATH ID: 6597 Software Authors: Radul, Alexey; Pearlmutter, Barak A.; Siskind, Jeffrey Mark Description: AD {it in} Fortran: implementation via prepreprocessor We describe an implementation of the {it Farfel Fortran77 AD extensions} [{it A. Radul} et al., “AD in Fortran, Part 1: Design”, url{arXiv:1203.1448}]. These extensions integrate forward and reverse AD directly into the programming model, with attendant benefits to flexibility, modularity, and ease of use. The implementation we describe is a “prepreprocessor” that generates input to existing Fortran-based AD tools. In essence, blocks of code which are targeted for AD by Farfel constructs are put into subprograms which capture their lexical variable context, and these are closure-converted into top-level subprograms and specialized to eliminate { t EXTERNAL} arguments, rendering them amenable to existing AD preprocessors, which are then invoked, possibly repeatedly if the AD is nested. Homepage: http://www.bcl.hamilton.ie/~qobi/fortran/ Keywords: nesting; multiple transformation; forward mode; reverse mode; { t Tapenade}; { t ADIFOR}; programming-language implementation Related Software: TAPENADE; ADIFOR; DiffSharp; Stan Cited in: 2 Publications Standard Articles 1 Publication describing the Software, including 1 Publication in zbMATH Year AD in Fortran: implementation via prepreprocessor. Zbl 1252.65059Radul, Alexey; Pearlmutter, Barak A.; Siskind, Jeffrey Mark 2012 all top 5 Cited by 7 Authors 2 Pearlmutter, Barak A. 1 Geeraert, Sébastien 1 Lehalle, Charles-Albert 1 Pironneau, Olivier 1 Radul, Alexey Andreyevich 1 Reghai, Adil 1 Siskind, Jeffrey Mark Cited in 1 Serial 1 European Series in Applied and Industrial Mathematics (ESAIM): Proceedings and Surveys Cited in 3 Fields 2 Numerical analysis (65-XX) 1 Partial differential equations (35-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Citations by Year