Radul, Alexey and Pearlmutter, Barak A. and Siskind, Jeffrey Mark
(2013)
AD in Fortran
Part 2: Implementation via Prepreprocessor.
Working Paper.
arXiv.
Abstract
We describe an implementation of the FARFEL FORTRAN AD extensions
(Radul et al., 2012). 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 EXTERNAL arguments, rendering them amenable to existing
AD preprocessors, which are then invoked, possibly repeatedly if the AD is nested.
| Item Type: |
Monograph
(Working Paper)
|
| Additional Information: |
Cite as: arXiv:1203.1450 [cs.PL]. This work was supported, in part, by Science Foundation Ireland grant
09/IN.1/I2637, National Science Foundation grant CCF-0438806, the Naval Research Laboratory
under Contract Number N00173-10-1-G023, and the Army Research Laboratory accomplished
under Cooperative Agreement Number W911NF-10-2-0060. Any views, opinions, findings, conclusions,
or recommendations contained or expressed in this document or material are those of the
author(s) and do not necessarily reflect or represent the views or official policies, either expressed
or implied, of SFI, NSF, NRL, the Office of Naval Research, ARL, or the Irish or U.S. Governments.
The U.S. Government is authorized to reproduce and distribute reprints for Government
purposes, notwithstanding any copyright notation herein. |
| Keywords: |
Nesting; multiple transformation; forward mode; reverse mode; TAPENADE; ADIFOR; programming-language implementation; |
| Academic Unit: |
Faculty of Science and Engineering > Computer Science |
| Item ID: |
6555 |
| Depositing User: |
Barak Pearlmutter
|
| Date Deposited: |
10 Nov 2015 16:42 |
| Publisher: |
arXiv |
| Refereed: |
Yes |
| Funders: |
Science Foundation Ireland (SFI) |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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