Blaze 3.9
syev.h
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1//=================================================================================================
33//=================================================================================================
34
35#ifndef _BLAZE_MATH_LAPACK_SYEV_H_
36#define _BLAZE_MATH_LAPACK_SYEV_H_
37
38
39//*************************************************************************************************
40// Includes
41//*************************************************************************************************
42
43#include <memory>
44#include <blaze/math/Aliases.h>
55#include <blaze/util/Assert.h>
58
59
60namespace blaze {
61
62//=================================================================================================
63//
64// LAPACK SYMMETRIC MATRIX EIGENVALUE FUNCTIONS (SYEV)
65//
66//=================================================================================================
67
68//*************************************************************************************************
71template< typename MT, bool SO, typename VT, bool TF >
72void syev( DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& w, char jobz, char uplo );
74//*************************************************************************************************
75
76
77//*************************************************************************************************
135template< typename MT // Type of the matrix A
136 , bool SO // Storage order of the matrix A
137 , typename VT // Type of the vector w
138 , bool TF > // Transpose flag of the vector w
139inline void syev( DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& w, char jobz, char uplo )
140{
147
153
154 using ET = ElementType_t<MT>;
155
156 if( !isSquare( *A ) ) {
157 BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
158 }
159
160 if( jobz != 'V' && jobz != 'N' ) {
161 BLAZE_THROW_INVALID_ARGUMENT( "Invalid jobz argument provided" );
162 }
163
164 if( uplo != 'L' && uplo != 'U' ) {
165 BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
166 }
167
168 resize( *w, (*A).rows(), false );
169
170 blas_int_t n ( numeric_cast<blas_int_t>( (*A).rows() ) );
171 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
172 blas_int_t info( 0 );
173
174 if( n == 0 ) {
175 return;
176 }
177
178 blas_int_t lwork( 10*n + 2 );
179 const std::unique_ptr<ET[]> work( new ET[lwork] );
180
181 if( IsRowMajorMatrix_v<MT> ) {
182 ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
183 }
184
185 syev( jobz, uplo, n, (*A).data(), lda, (*w).data(), work.get(), lwork, &info );
186
187 BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for eigenvalue computation" );
188
189 if( info > 0 ) {
190 BLAZE_THROW_LAPACK_ERROR( "Eigenvalue computation failed" );
191 }
192}
193//*************************************************************************************************
194
195} // namespace blaze
196
197#endif
Constraint on the data type.
Header file for auxiliary alias declarations.
typename T::ElementType ElementType_t
Alias declaration for nested ElementType type definitions.
Definition: Aliases.h:190
Header file for run time assertion macros.
Constraint on the data type.
Constraint on the data type.
Constraint on the data type.
Header file for the IsRowMajorMatrix type trait.
Constraint on the data type.
Cast operators for numeric types.
Header file for the CLAPACK syev wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Base class for N-dimensional dense vectors.
Definition: DenseVector.h:77
Constraint on the data type.
Header file for the DenseMatrix base class.
Header file for the DenseVector base class.
#define BLAZE_CONSTRAINT_MUST_BE_BUILTIN_TYPE(T)
Constraint on the data type.
Definition: Builtin.h:60
void syev(DenseMatrix< MT, SO > &A, DenseVector< VT, TF > &w, char jobz, char uplo)
LAPACK kernel for computing the eigenvalues of the given dense symmetric matrix.
Definition: syev.h:139
#define BLAZE_CONSTRAINT_MUST_BE_BLAS_COMPATIBLE_TYPE(T)
Constraint on the data type.
Definition: BLASCompatible.h:61
#define BLAZE_CONSTRAINT_MUST_BE_CONTIGUOUS_TYPE(T)
Constraint on the data type.
Definition: Contiguous.h:61
#define BLAZE_CONSTRAINT_MUST_NOT_BE_COMPUTATION_TYPE(T)
Constraint on the data type.
Definition: Computation.h:81
#define BLAZE_CONSTRAINT_MUST_NOT_BE_ADAPTOR_TYPE(T)
Constraint on the data type.
Definition: Adaptor.h:81
#define BLAZE_CONSTRAINT_MUST_HAVE_MUTABLE_DATA_ACCESS(T)
Constraint on the data type.
Definition: MutableDataAccess.h:61
int32_t blas_int_t
Signed integer type used in the BLAS/LAPACK wrapper functions.
Definition: Types.h:64
#define BLAZE_THROW_LAPACK_ERROR(MESSAGE)
Macro for the emission of an exception on detection of a LAPACK error.
Definition: Exception.h:146
void resize(Matrix< MT, SO > &matrix, size_t rows, size_t columns, bool preserve=true)
Changing the size of the matrix.
Definition: Matrix.h:1108
bool isSquare(const Matrix< MT, SO > &matrix) noexcept
Checks if the given matrix is a square matrix.
Definition: Matrix.h:1383
#define BLAZE_INTERNAL_ASSERT(expr, msg)
Run time assertion macro for internal checks.
Definition: Assert.h:101
#define BLAZE_THROW_INVALID_ARGUMENT(MESSAGE)
Macro for the emission of a std::invalid_argument exception.
Definition: Exception.h:235
Header file for the exception macros of the math module.