mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-21 07:19:46 +08:00
103 lines
6.2 KiB
Plaintext
103 lines
6.2 KiB
Plaintext
namespace Eigen {
|
|
|
|
/** \page TopicPreprocessorDirectives Preprocessor directives
|
|
|
|
You can control some aspects of %Eigen by defining the preprocessor tokens using \c \#define. These macros
|
|
should be defined before any %Eigen headers are included. Often they are best set in the project options.
|
|
|
|
This page lists the preprocesor tokens recognised by %Eigen.
|
|
|
|
<b>Table of contents</b>
|
|
- \ref TopicPreprocessorDirectivesMajor
|
|
- \ref TopicPreprocessorDirectivesAssertions
|
|
- \ref TopicPreprocessorDirectivesPerformance
|
|
- \ref TopicPreprocessorDirectivesPlugins
|
|
- \ref TopicPreprocessorDirectivesDevelopers
|
|
|
|
|
|
\section TopicPreprocessorDirectivesMajor Macros with major effects
|
|
|
|
- \b EIGEN2_SUPPORT - if defined, enables the Eigen2 compatibility mode. This is meant to ease the transition
|
|
of Eigen2 to Eigen3 (see \ref Eigen2ToEigen3). Not defined by default.
|
|
- \b EIGEN2_SUPPORT_STAGEnn_xxx (for various values of nn and xxx) - staged migration path from Eigen2 to
|
|
Eigen3; see \ref Eigen2SupportModes.
|
|
- \b EIGEN_DEFAULT_TO_ROW_MAJOR - when defined, the default storage order for matrices becomes row-major
|
|
instead of column-major. Not defined by default.
|
|
- \b EIGEN_DEFAULT_DENSE_INDEX_TYPE - the type for column and row indices in matrices, vectors and array
|
|
(DenseBase::Index). Set to \c std::ptrdiff_t by default.
|
|
- \b EIGEN_DEFAULT_IO_FORMAT - the IOFormat to use when printing a matrix if no #IOFormat is specified.
|
|
Defaults to the #IOFormat constructed by the default constructor IOFormat().
|
|
- \b EIGEN_INITIALIZE_MATRICES_BY_ZERO - if defined, all entries of newly constructed matrices and arrays are
|
|
initializes to zero, as are new entries in matrices and arrays after resizing. Not defined by default.
|
|
|
|
|
|
\section TopicPreprocessorDirectivesAssertions Assertions
|
|
|
|
The %Eigen library contains many assertions to guard against programming errors, both at compile time and at
|
|
run time. However, these assertions do cost time and can thus be turned off.
|
|
|
|
- \b EIGEN_NO_DEBUG - disables %Eigen's assertions if defined. Not defined by default, unless the
|
|
\c NDEBUG macro is defined (this is a standard C++ macro which disables all asserts).
|
|
- \b EIGEN_NO_STATIC_ASSERT - if defined, compile-time static assertions are replaced by runtime assertions;
|
|
this saves compilation time. Not defined by default.
|
|
- \b eigen_assert - macro with one argument that is used inside %Eigen for assertions. By default, it is
|
|
basically defined to be \c assert, which aborts the program if the assertion is violated. Redefine this
|
|
macro if you want to do something else, like throwing an exception.
|
|
|
|
|
|
\section TopicPreprocessorDirectivesPerformance Alignment, vectorization and performance tweaking
|
|
|
|
- \b EIGEN_DONT_ALIGN - disables alignment completely. %Eigen will not try to align its objects and does not
|
|
expect that any objects passed to it are aligned. This will turn off vectorization. Not defined by default.
|
|
- \b EIGEN_DONT_ALIGN_STATICALLY - disables alignment of arrays on the stack. Not defined by default, unless
|
|
\c EIGEN_DONT_ALIGN is defined.
|
|
- \b EIGEN_DONT_VECTORIZE - disables explicit vectorization when defined. Not defined by default, unless
|
|
alignment is disabled by %Eigen's platform test or the user defining \c EIGEN_DONT_ALIGN.
|
|
- \b EIGEN_FAST_MATH - enables some optimizations which might affect the accuracy of the result. The only
|
|
optimization this currently includes is single precision sin() and cos() in the present of SSE
|
|
vectorization. Defined by default.
|
|
- \b EIGEN_UNROLLING_LIMIT - defines the size of a loop to enable meta unrolling. Set it to zero to disable
|
|
unrolling. The size of a loop here is expressed in %Eigen's own notion of "number of FLOPS", it does not
|
|
correspond to the number of iterations or the number of instructions. The default is value 100.
|
|
|
|
|
|
\section TopicPreprocessorDirectivesPlugins Plugins
|
|
|
|
It is possible to add new methods to many fundamental classes in %Eigen by writing a plugin. As explained in
|
|
the section \ref ExtendingMatrixBase, the plugin is specified by defining a \c EIGEN_xxx_PLUGIN macro. The
|
|
following macros are supported; none of them are defined by default.
|
|
|
|
- \b EIGEN_ARRAY_PLUGIN - filename of plugin for extending the Array class.
|
|
- \b EIGEN_ARRAYBASE_PLUGIN - filename of plugin for extending the ArrayBase class.
|
|
- \b EIGEN_CWISE_PLUGIN - filename of plugin for extending the Cwise class.
|
|
- \b EIGEN_DENSEBASE_PLUGIN - filename of plugin for extending the DenseBase class.
|
|
- \b EIGEN_DYNAMICSPARSEMATRIX_PLUGIN - filename of plugin for extending the DynamicSparseMatrix class.
|
|
- \b EIGEN_MATRIX_PLUGIN - filename of plugin for extending the Matrix class.
|
|
- \b EIGEN_MATRIXBASE_PLUGIN - filename of plugin for extending the MatrixBase class.
|
|
- \b EIGEN_PLAINOBJECTBASE_PLUGIN - filename of plugin for extending the PlainObjectBase class.
|
|
- \b EIGEN_QUATERNIONBASE_PLUGIN - filename of plugin for extending the QuaternionBase class.
|
|
- \b EIGEN_SPARSEMATRIX_PLUGIN - filename of plugin for extending the SparseMatrix class.
|
|
- \b EIGEN_SPARSEMATRIXBASE_PLUGIN - filename of plugin for extending the SparseMatrixBase class.
|
|
- \b EIGEN_SPARSEVECTOR_PLUGIN - filename of plugin for extending the SparseVector class.
|
|
- \b EIGEN_TRANSFORM_PLUGIN - filename of plugin for extending the Transform class.
|
|
- \b EIGEN_FUNCTORS_PLUGIN - filename of plugin for adding new functors and specializations of functor_traits.
|
|
|
|
|
|
\section TopicPreprocessorDirectivesDevelopers Macros for Eigen developers
|
|
|
|
These macros are mainly meant for people developing %Eigen. However, they can also be useful for power users
|
|
and the curious.
|
|
|
|
- \b EIGEN_INTERNAL_DEBUGGING - if defined, enables assertions in %Eigen's internal routines. This is useful
|
|
for debugging %Eigen itself. Not defined by default.
|
|
- \b EIGEN_NO_MALLOC - if defined, any request from inside the %Eigen to allocate memory from the heap
|
|
results in an assertion failure. This is useful to check that some routine does not allocate memory
|
|
dynamically. Not defined by default.
|
|
- \b EIGEN_RUNTIME_NO_MALLOC - if defined, a new switch is introduced which can be turned on and off by
|
|
calling <tt>set_is_malloc_allowed(bool)</tt>. If malloc is not allowed and %Eigen tries to allocate memory
|
|
dynamically anyway, an assertion failure results. Not defined by default.
|
|
|
|
*/
|
|
|
|
}
|