potrf.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_POTRF_H_
36 #define _BLAZE_MATH_LAPACK_POTRF_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <blaze/math/Aliases.h>
49 #include <blaze/math/Exception.h>
53 #include <blaze/util/Assert.h>
54 #include <blaze/util/NumericCast.h>
55 
56 
57 namespace blaze {
58 
59 //=================================================================================================
60 //
61 // LAPACK LLH (CHOLESKY) DECOMPOSITION FUNCTIONS (POTRF)
62 //
63 //=================================================================================================
64 
65 //*************************************************************************************************
68 template< typename MT, bool SO >
69 inline void potrf( DenseMatrix<MT,SO>& A, char uplo );
71 //*************************************************************************************************
72 
73 
74 //*************************************************************************************************
116 template< typename MT // Type of the dense matrix
117  , bool SO > // Storage order of the dense matrix
118 inline void potrf( DenseMatrix<MT,SO>& A, char uplo )
119 {
125 
126  if( !isSquare( ~A ) ) {
127  BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
128  }
129 
130  if( uplo != 'L' && uplo != 'U' ) {
131  BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
132  }
133 
134  int n ( numeric_cast<int>( (~A).rows() ) );
135  int lda ( numeric_cast<int>( (~A).spacing() ) );
136  int info( 0 );
137 
138  if( n == 0 ) {
139  return;
140  }
141 
142  if( IsRowMajorMatrix_v<MT> ) {
143  ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
144  }
145 
146  potrf( uplo, n, (~A).data(), lda, &info );
147 
148  BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for Cholesky decomposition" );
149 
150  if( info > 0 ) {
151  BLAZE_THROW_LAPACK_ERROR( "Decomposition of non-positive-definite matrix failed" );
152  }
153 }
154 //*************************************************************************************************
155 
156 } // namespace blaze
157 
158 #endif
#define BLAZE_THROW_INVALID_ARGUMENT(MESSAGE)
Macro for the emission of a std::invalid_argument exception.This macro encapsulates the default way o...
Definition: Exception.h:235
Constraint on the data type.
Header file for auxiliary alias declarations.
#define BLAZE_CONSTRAINT_MUST_HAVE_MUTABLE_DATA_ACCESS(T)
Constraint on the data type.In case the given data type T does not provide low-level data access to m...
Definition: MutableDataAccess.h:61
MT::ElementType * data(DenseMatrix< MT, SO > &dm) noexcept
Low-level data access to the dense matrix elements.
Definition: DenseMatrix.h:169
#define BLAZE_CONSTRAINT_MUST_NOT_BE_COMPUTATION_TYPE(T)
Constraint on the data type.In case the given data type T is a computational expression (i...
Definition: Computation.h:81
Header file for the CLAPACK potrf wrapper functions.
Constraint on the data type.
Constraint on the data type.
Cast operators for numeric types.
#define BLAZE_CONSTRAINT_MUST_NOT_BE_ADAPTOR_TYPE(T)
Constraint on the data type.In case the given data type T is an adaptor type (as for instance LowerMa...
Definition: Adaptor.h:81
Base class for dense matrices.The DenseMatrix class is a base class for all dense matrix classes...
Definition: DenseMatrix.h:80
typename T::ElementType ElementType_t
Alias declaration for nested ElementType type definitions.The ElementType_t alias declaration provide...
Definition: Aliases.h:170
size_t spacing(const DenseMatrix< MT, SO > &dm) noexcept
Returns the spacing between the beginning of two rows/columns.
Definition: DenseMatrix.h:252
Constraint on the data type.
Namespace of the Blaze C++ math library.
Definition: Blaze.h:58
#define BLAZE_CONSTRAINT_MUST_BE_CONTIGUOUS_TYPE(T)
Constraint on the data type.In case the given data type T is not an array-like data type with contigu...
Definition: Contiguous.h:61
Header file for the DenseMatrix base class.
Header file for the exception macros of the math module.
Constraint on the data type.
Header file for run time assertion macros.
#define BLAZE_CONSTRAINT_MUST_BE_BLAS_COMPATIBLE_TYPE(T)
Constraint on the data type.In case the given data type T is not a BLAS compatible data type (i...
Definition: BLASCompatible.h:61
constexpr size_t rows(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of rows of the matrix.
Definition: Matrix.h:498
Header file for the IsRowMajorMatrix type trait.
#define BLAZE_THROW_LAPACK_ERROR(MESSAGE)
Macro for the emission of an exception on detection of a LAPACK error.This macro encapsulates the def...
Definition: Exception.h:146
void potrf(char uplo, int n, float *A, int lda, int *info)
LAPACK kernel for the Cholesky decomposition of the given dense positive definite single precision co...
Definition: potrf.h:131
bool isSquare(const Matrix< MT, SO > &matrix) noexcept
Checks if the given matrix is a square matrix.
Definition: Matrix.h:951
#define BLAZE_INTERNAL_ASSERT(expr, msg)
Run time assertion macro for internal checks.In case of an invalid run time expression, the program execution is terminated. The BLAZE_INTERNAL_ASSERT macro can be disabled by setting the BLAZE_USER_ASSERTION flag to zero or by defining NDEBUG during the compilation.
Definition: Assert.h:101