AD Tool: TAF
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TAF


Summary:
Transformation of Algorithms in Fortran (TAF) is a source-to-source AD-tool for Fortran-95 programs. TAF supports forward and reverse mode of AD and Automatic Sparsity Detection (ASD) for detection of the sparsity structure of Jacobians.

URL: http://fastopt.de/products/taf/taf.shtml

Developers:
Mode: Forward
Reverse
 
Method: Source transformation
 
supported Language: Fortran 77/90
Fortran2003
Fortran2008
Fortran77
Fortran95

Reference:
Ralf Giering, Thomas Kaminski
Recipes for Adjoint Code Construction
Article in ACM Transactions on Mathematical Software, 1998

Ralf Giering, Thomas Kaminski, T. Slawig
Generating Efficient Derivative Code with TAF: Adjoint and Tangent Linear Euler Flow Around an Airfoil
Article in Future Generation Computer Systems, 2005



Features:

Fortran-95 Support:


TAF supports the full Fortran-95 standard.

Fortran-2003 Support:


TAF supports part of the Fortran-2003 standard.

Fortran-2008 Support:


TAF supports some of the Fortran-2008 standard.


Analyses:


TAF normalizes the code and applies a control flow analysis. TAF applies
an intraprocedural data dependence and an interprocedural data flow analysis.
Given the independent and dependent variables of the specified top-level
routine, TAF determines all active routines and variables and produces
derivative code only for those.


Performance:


TAF predicts the computational costs of code fragments for an (sub)optimal
decision between recomputation and storing of intermediate results in reverse
mode.


Directives:


TAF accepts several kinds of directives. Using the reverse mode storing
of variables is controlled by directives.


Multi level checkpointing can be implemented by splitting a loop and
inserting directives.

Black box (library) routines are handled using flow information given
by directives.


AwardsHeinz-Billing-Award 1995 for the advancement of scientific computing

Supported Platforms:
  • Application Server


Licensing: license

References on TAF in our publication database:  66

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