Blaze 3.9
sytrf.h
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1//=================================================================================================
33//=================================================================================================
34
35#ifndef _BLAZE_MATH_LAPACK_SYTRF_H_
36#define _BLAZE_MATH_LAPACK_SYTRF_H_
37
38
39//*************************************************************************************************
40// Includes
41//*************************************************************************************************
42
43#include <memory>
44#include <blaze/math/Aliases.h>
54#include <blaze/util/Assert.h>
56
57
58namespace blaze {
59
60//=================================================================================================
61//
62// LAPACK LDLT DECOMPOSITION FUNCTIONS (SYTRF)
63//
64//=================================================================================================
65
66//*************************************************************************************************
69template< typename MT, bool SO >
70void sytrf( DenseMatrix<MT,SO>& A, char uplo, blas_int_t* ipiv );
72//*************************************************************************************************
73
74
75//*************************************************************************************************
119template< typename MT // Type of the dense matrix
120 , bool SO > // Storage order of the dense matrix
121inline void sytrf( DenseMatrix<MT,SO>& A, char uplo, blas_int_t* ipiv )
122{
128
129 using ET = ElementType_t<MT>;
130
131 if( !isSquare( *A ) ) {
132 BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
133 }
134
135 if( uplo != 'L' && uplo != 'U' ) {
136 BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
137 }
138
139 blas_int_t n ( numeric_cast<blas_int_t>( (*A).rows() ) );
140 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
141 blas_int_t info( 0 );
142
143 if( n == 0 ) {
144 return;
145 }
146
147 blas_int_t lwork( n*lda );
148 const std::unique_ptr<ET[]> work( new ET[lwork] );
149
150 if( IsRowMajorMatrix_v<MT> ) {
151 ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
152 }
153
154 sytrf( uplo, n, (*A).data(), lda, ipiv, work.get(), lwork, &info );
155
156 BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for matrix decomposition" );
157}
158//*************************************************************************************************
159
160} // namespace blaze
161
162#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.
Header file for the IsRowMajorMatrix type trait.
Constraint on the data type.
Cast operators for numeric types.
Header file for the CLAPACK sytrf wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Constraint on the data type.
Header file for the DenseMatrix base class.
void sytrf(DenseMatrix< MT, SO > &A, char uplo, blas_int_t *ipiv)
LAPACK kernel for the decomposition of the given dense symmetric indefinite matrix.
Definition: sytrf.h:121
#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
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.