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TAC++ is a source-to-source translator for C(++) code, i.e. TAC++ accepts C(++) code as input, applies a semantic transformation, and generates C(++) code as output. The generated code can operate in forward or reverse mode (tangent linear or adjoint model). TAC++ can generate code to evaluate Jacobian times vector products or the full Jacobian. Higher order derivative code is generated by applying TAC++ multiple times. TAC++ transfers the well proven design concepts for our AD tool TAF to C(++).

HIGHLIGHTS:

Analyses:

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

Directives:

TAC++ accepts several kinds of directives. Currently these directives are used to support the tool's code analysis. Inclusion of directives that trigger generation of storing/reading schemes for required values is in progress.

Readability:

TAC++ generated code is structured an well readable.

APPLICATIONS:

See an overview and a list of references for some of the first TAC++ applications.

Download example of TAC++ generated code for a Monte Carlo simulation in computational finance (LIBOR market model). Original model code and hand-coded tangent and adjoint by Mike Giles are available here .

AVAILABILITY:

TAC++ is a commercial product. Contact us to obtain a TAC++ licence.

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