Blaze 3.9
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>
55
56
57namespace blaze {
58
59//=================================================================================================
60//
61// LAPACK QL DECOMPOSITION FUNCTIONS (GEQLF)
62//
63//=================================================================================================
64
65//*************************************************************************************************
68template< typename MT, bool SO >
69void geqlf( DenseMatrix<MT,SO>& A, ElementType_t<MT>* tau );
71//*************************************************************************************************
72
73
74//*************************************************************************************************
117template< 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 blas_int_t m ( numeric_cast<blas_int_t>( SO ? (*A).rows() : (*A).columns() ) );
130 blas_int_t n ( numeric_cast<blas_int_t>( SO ? (*A).columns() : (*A).rows() ) );
131 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
132 blas_int_t info( 0 );
133
134 if( m == 0 || n == 0 ) {
135 return;
136 }
137
138 blas_int_t 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.
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.
Cast operators for numeric types.
Header file for the CLAPACK geqlf wrapper functions.
Header file for the CLAPACK gerqf wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Constraint on the data type.
Header file for the DenseMatrix base class.
void geqlf(DenseMatrix< MT, SO > &A, ElementType_t< MT > *tau)
LAPACK kernel for the QL decomposition of the given dense matrix.
Definition: geqlf.h:119
void gerqf(blas_int_t m, blas_int_t n, float *A, blas_int_t lda, float *tau, float *work, blas_int_t lwork, blas_int_t *info)
LAPACK kernel for the RQ decomposition of the given dense single precision column-major matrix.
Definition: gerqf.h:152
#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_INTERNAL_ASSERT(expr, msg)
Run time assertion macro for internal checks.
Definition: Assert.h:101