Recover primal values from primal values tapes in ExternalFunctionHelper.
Forward AD type for CUDA kernels.
Matrix matrix multiplications can now be handled in an optimal way with CoDiPack.
Tagging tape for detecting errors in the AD workflow.
Bugfix:
Uninitialized values in external function helper.
External function outputs in Jacobian tapes no longer use unused indices.
Other:
Added low level function support to the tapes. Low level functions are between external functions and statements. As they can occur quite often, they reduce the overhead for storing data as mutch as possible.
Added helper structures for creating low level functions.
External functions are now handled via the low level function interface.
v 2.1.0 - 2023-05-10
Features:
Helpers for linear system solvers. See Example 21 for details.
Event system. See Example 22 for details.
Support for shared-memory parallel settings, specifically OpenMP.
OpDiLib bindings.
CMake support.
Bugfix:
Initialization fixes.
Initialization of passive values.
Preaccumulation disables the tape during the algorithm.
Proper assigning of 1st order derivatives to 2nd order derivatives.
Proper reset of reuse index mangers.
Swap of primal value tapes resizes primal value vectors.
Tapes handle small chunk sizes correctly.
Other:
Expression trait for the number of operations.
Forward tape evaluation tests for primal value tapes.
Gcc warning of no return statement is now an error.
Make std::fmin and std::fmax available in namespace.
clangd compatibility with CODI_IDE.
v 2.0.2 - 2022-06-14
Bugfix:
Prevent copy constrution of tapes.
Proper activity tracking for linear index tapes in MeDiPack.
v 2.0.1 - 2021-11-15
Bugfix:
Fixed a stack corruption in the reverse interpretation of tapes with a linear index manager.
Renamed folders aux -> misc for windows compatibility.
PreaccumulationHelper with changing sizes could give a segmentation fault
PreaccumulationHelper with changing zero patterns gave wrong results
Dirty adjoint vector after computeJacobian call in Algorithms with a forward evaluation
v 1.9.2 - 2020-04-28
Core functionality:
Support for remainder and round function.
MeDiPack bindings:
Updated MeDiPack bindings to MeDiPack 1.2 (not backwards compatible).
MSVC compatibility:
Renaming interface -> inter.
v 1.9.1 - 2020-01-13
Bugfix:
Missing declaration of MaxDerivativeOrder in UnaryOp type traits.
v 1.9.0 - 2019-10-30
Helper structures:
EvaluationHelper:
Simplifies the computation of Jacobian and Hessian matrices for functions, function objects and lambda functions. Only the function needs to be provided and the helper will compute all derivatives.
See Tutorial B1, B1.1 and B1.2.
TapeHelper:
Provides a more convenient handling of the tape recording and derivative computation process. All CoDiPack specifics are hidden and the user can compute the full Jacobian or Hessian matrix with a simple function call.
See Tutorial B2
Expression rework:
Binary and unary expressions are now defined via logic objects that provide the derivative and primal evaluation functions.
Users can now change the derivative logic for custom types by the specialization of these logic objects.
Test suite:
The test suite checks now also primal and second order derivatives.
Bugfix:
Overflow check for linear index handlers
v 1.8.0 - 2019-01-07
Interface:
Added function to disable active variables
Feature: On the fly combination of entries for the same argument in Jacobian tapes.
See CODI_EnableCombineJacobianArguments for details
New tutorials:
Tutorial for recording of several different tapes in one application at different times
Internal:
Removed intermediate lambda functions in tape evaluation functions
Tape modules are now implemented as structures and no longer included as super macros
v 1.7.0 - 2018-10-30
Support for forward evaluation of tapes finalized
Support for primal evaluation of tapes
MeDiPack interfaces are now provided with CoDiPack
Removed AdjointMPI interfaces
v 1.6.0 - 2018-03-15
First support for forward evaluation of tapes
Used in the preaccumulation helper for code sections that have more output values than input values.
Default Change: Adjoint values are reset by default
10% to 20% performance improvement possible
Adjoint values in the RealReverse types are now automatically reset during the reverse interpretation. A call to clearAdjoints is no longer necessary, only the input values need to be set manually to zero.
Bugfix: Input values after a computation for RealReverseIndex tapes
If an index for an input value was used before the input value is registered, then the result for the input was zero and other input values received wrong updates.
Bugfix: Memory leak in external function helper.
Generalized function for stack evaluation
Intermediate function are no longer required for the stack evaluation.
v 1.5.0 - 2017-12-18
Support for custom adjoint vectors
User provided adjoint vectors can now be used in the reverse evaluation
Support added for external functions
External function interface addition
Extra parameter which provides a general access to the adjoint vector
Several helper structures:
TapeVectorHelper
Easy API for the new custom adjoint vector features
See Tutorial A4
ExternalFunctionHelper:
Helper structure for handling libraries which can not be differentiated or to optimize the reverse evaluation for larger code parts
See Tutorial A1
PreaccumulationHelper:
Helper structure for the memory optimization of small code parts
If the code part has only few input and output values but is computational expensive, the Jacobian is stored instead of the evaluation trace
See Tutorial A2
StatementPushHelper:
Helper structure for the memory optimization of single statements
If the Jacobian of the statement can be computed efficiently manually this information can be directly provided to CoDiPack
See Tutorial A3
v 1.4.1 - 2017-09-26
Bugfix for index managers
The statement 'a = a;' would deactivate a as a variable
v 1.4.0 - 2017-02-16
Generalized types: RealForwardGen, RealReverseGen, etc.
Removed Float types (Use generalized types)
Higher order derivative helper
Select single derivatives by there order and number
Set all derivatives of a specific order
See tutorials 7, 7.1 and 7.2
Write/read tapes to and from files
Management of multiple tapes
External functions interface changed
User functions have now a pointer to the calling tape.
v 1.3.0 - 2016-09-14
Primal value taping
New chunk types: RealReversePrimal, RealReversePrimalIndex
New unchecked types: RealReversePrimalUnchecked, RealReversePrimalIndexUnchecked
New vector types: RealReversePrimalVec, RealReversePrimalIndexVec
Specialization for numeric_limits
Added erf and erfc
v 1.2.3 - 2016-06-13
Bugfix for higher order derivatives:
The check for zero Jacobians and adjoints was wrong
Added fmin and fmax as expressions
v 1.2.2 - 2016-05-26
Bugfix for prefix increment operator
v 1.2.1 - 2016-04-20
Introduction of the macro CODI_INLINE. This can be used to force the inlining of CoDiPack.
v 1.2 - 2016-04-07
ReferenceActiveReal type for the optimizations of arguments
e.g. w = x*x*x + sin(x);
stores 1 Jacobian instead of 4
Assign optimization index manger (new default one)
1.10.0