Blaze 3.9
orgql.h
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1//=================================================================================================
33//=================================================================================================
34
35#ifndef _BLAZE_MATH_LAPACK_ORGQL_H_
36#define _BLAZE_MATH_LAPACK_ORGQL_H_
37
38
39//*************************************************************************************************
40// Includes
41//*************************************************************************************************
42
43#include <memory>
44#include <blaze/math/Aliases.h>
53#include <blaze/util/Assert.h>
56
57
58namespace blaze {
59
60//=================================================================================================
61//
62// LAPACK FUNCTIONS TO RECONSTRUCT Q FROM A QL DECOMPOSITION (ORGQL)
63//
64//=================================================================================================
65
66//*************************************************************************************************
69template< typename MT, bool SO >
70void orgql( DenseMatrix<MT,SO>& A, const ElementType_t<MT>* tau );
72//*************************************************************************************************
73
74
75//*************************************************************************************************
118template< typename MT, bool SO >
119inline void orgql( DenseMatrix<MT,SO>& A, const ElementType_t<MT>* tau )
120{
127
128 using ET = ElementType_t<MT>;
129
130 blas_int_t m ( numeric_cast<blas_int_t>( SO ? (*A).rows() : (*A).columns() ) );
131 blas_int_t n ( numeric_cast<blas_int_t>( SO ? (*A).columns() : (*A).rows() ) );
132 blas_int_t k ( min( m, n ) );
133 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
134 blas_int_t info( 0 );
135
136 if( k == 0 ) {
137 return;
138 }
139
140 blas_int_t lwork( k*lda );
141 const std::unique_ptr<ET[]> work( new ET[lwork] );
142
143 if( SO ) {
144 const size_t offset( ( m < n )?( n - m ):( 0UL ) );
145 orgql( m, k, k, (*A).data(offset), lda, tau, work.get(), lwork, &info );
146 }
147 else {
148 const size_t offset( ( m > n )?( m - n ):( 0UL ) );
149 orgrq( k, n, k, (*A).data()+offset, lda, tau, work.get(), lwork, &info );
150 }
151
152 BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for Q reconstruction" );
153}
154//*************************************************************************************************
155
156} // namespace blaze
157
158#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.
Constraint on the data type.
Cast operators for numeric types.
Header file for the CLAPACK orgql wrapper functions.
Header file for the CLAPACK orgrq wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Constraint on the data type.
Header file for the DenseMatrix base class.
#define BLAZE_CONSTRAINT_MUST_BE_BUILTIN_TYPE(T)
Constraint on the data type.
Definition: Builtin.h:60
decltype(auto) min(const DenseMatrix< MT1, SO1 > &lhs, const DenseMatrix< MT2, SO2 > &rhs)
Computes the componentwise minimum of the dense matrices lhs and rhs.
Definition: DMatDMatMapExpr.h:1339
void orgrq(blas_int_t m, blas_int_t n, blas_int_t k, float *A, blas_int_t lda, const float *tau, float *work, blas_int_t lwork, blas_int_t *info)
LAPACK kernel for the reconstruction of the orthogonal matrix Q from a RQ decomposition.
Definition: orgrq.h:125
void orgql(DenseMatrix< MT, SO > &A, const ElementType_t< MT > *tau)
LAPACK kernel for the reconstruction of the orthogonal matrix Q from a QL decomposition.
Definition: orgql.h:119
#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