Blaze  3.6
geqlf.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_GEQLF_H_
36 #define _BLAZE_MATH_LAPACK_GEQLF_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <blaze/math/Aliases.h>
53 #include <blaze/util/Assert.h>
54 #include <blaze/util/NumericCast.h>
55 
56 
57 namespace blaze {
58 
59 //=================================================================================================
60 //
61 // LAPACK QL DECOMPOSITION FUNCTIONS (GEQLF)
62 //
63 //=================================================================================================
64 
65 //*************************************************************************************************
68 template< typename MT, bool SO >
69 void geqlf( DenseMatrix<MT,SO>& A, ElementType_t<MT>* tau );
71 //*************************************************************************************************
72 
73 
74 //*************************************************************************************************
117 template< typename MT // Type of the dense matrix
118  , bool SO > // Storage order of the dense matrix
120 {
126 
127  using ET = ElementType_t<MT>;
128 
129  int m ( numeric_cast<int>( SO ? (~A).rows() : (~A).columns() ) );
130  int n ( numeric_cast<int>( SO ? (~A).columns() : (~A).rows() ) );
131  int lda ( numeric_cast<int>( (~A).spacing() ) );
132  int info( 0 );
133 
134  if( m == 0 || n == 0 ) {
135  return;
136  }
137 
138  int lwork( ( SO ? n : m ) * lda );
139  const std::unique_ptr<ET[]> work( new ET[lwork] );
140 
141  if( SO ) {
142  geqlf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
143  }
144  else {
145  gerqf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
146  }
147 
148  BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for QL decomposition" );
149 }
150 //*************************************************************************************************
151 
152 } // namespace blaze
153 
154 #endif
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
void gerqf(int m, int n, float *A, int lda, float *tau, float *work, int lwork, int *info)
LAPACK kernel for the RQ decomposition of the given dense single precision column-major matrix.
Definition: gerqf.h:147
#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
Constraint on the data type.
Header file for the CLAPACK geqlf wrapper functions.
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.
Constraint on the data type.
Header file for the CLAPACK gerqf wrapper functions.
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
void geqlf(int m, int n, float *A, int lda, float *tau, float *work, int lwork, int *info)
LAPACK kernel for the QL decomposition of the given dense single precision column-major matrix.
Definition: geqlf.h:147
#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