Blaze  3.6
sytri.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_SYTRI_H_
36 #define _BLAZE_MATH_LAPACK_SYTRI_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <blaze/math/Aliases.h>
50 #include <blaze/math/Exception.h>
54 #include <blaze/util/Assert.h>
55 #include <blaze/util/NumericCast.h>
56 
57 
58 namespace blaze {
59 
60 //=================================================================================================
61 //
62 // LAPACK LDLT-BASED INVERSION FUNCTIONS (SYTRI)
63 //
64 //=================================================================================================
65 
66 //*************************************************************************************************
69 template< typename MT, bool SO >
70 void sytri( DenseMatrix<MT,SO>& A, char uplo, const int* ipiv );
72 //*************************************************************************************************
73 
74 
75 //*************************************************************************************************
113 template< typename MT // Type of the dense matrix
114  , bool SO > // Storage order of the dense matrix
115 inline void sytri( DenseMatrix<MT,SO>& A, char uplo, const int* ipiv )
116 {
122 
123  using ET = ElementType_t<MT>;
124 
125  if( !isSquare( ~A ) ) {
126  BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
127  }
128 
129  if( uplo != 'L' && uplo != 'U' ) {
130  BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
131  }
132 
133  int n ( numeric_cast<int>( (~A).columns() ) );
134  int lda ( numeric_cast<int>( (~A).spacing() ) );
135  int info( 0 );
136 
137  if( n == 0 ) {
138  return;
139  }
140 
141  if( IsRowMajorMatrix_v<MT> ) {
142  ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
143  }
144 
145  const std::unique_ptr<ET[]> work( new ET[n] );
146 
147  sytri( uplo, n, (~A).data(), lda, ipiv, work.get(), &info );
148 
149  BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for matrix inversion" );
150 
151  if( info > 0 ) {
152  BLAZE_THROW_LAPACK_ERROR( "Inversion of singular matrix failed" );
153  }
154 }
155 //*************************************************************************************************
156 
157 } // namespace blaze
158 
159 #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:170
Header file for the CLAPACK sytri wrapper functions.
#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
Constraint on the data type.
Constraint on the data type.
Cast operators for numeric types.
constexpr size_t columns(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of columns of the matrix.
Definition: Matrix.h:514
#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:81
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:253
void sytri(char uplo, int n, float *A, int lda, const int *ipiv, float *work, int *info)
LAPACK kernel for the inversion of the given dense symmetric indefinite single precision column-major...
Definition: sytri.h:132
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
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
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,...
Definition: Assert.h:101