Blaze 3.9
unmql.h
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1//=================================================================================================
33//=================================================================================================
34
35#ifndef _BLAZE_MATH_LAPACK_UNMQL_H_
36#define _BLAZE_MATH_LAPACK_UNMQL_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 FUNCTIONS TO MULTIPLY Q FROM A QL DECOMPOSITION WITH A MATRIX (UNMQL)
65//
66//=================================================================================================
67
68//*************************************************************************************************
71template< typename MT1, bool SO, typename MT2 >
72void unmql( DenseMatrix<MT1,SO>& C, const DenseMatrix<MT2,SO>& A,
73 char side, char trans, const ElementType_t<MT2>* tau );
75//*************************************************************************************************
76
77
78//*************************************************************************************************
143template< typename MT1, bool SO, typename MT2 >
145 char side, char trans, const ElementType_t<MT2>* tau )
146{
153
160
161 using ET = ElementType_t<MT1>;
162
163 if( (*A).rows() < (*A).columns() ) {
164 BLAZE_THROW_INVALID_ARGUMENT( "Invalid size of Q matrix" );
165 }
166
167 if( side != 'L' && side != 'R' ) {
168 BLAZE_THROW_INVALID_ARGUMENT( "Invalid side argument provided" );
169 }
170
171 if( trans != 'N' && trans != 'C' ) {
172 BLAZE_THROW_INVALID_ARGUMENT( "Invalid trans argument provided" );
173 }
174
175 blas_int_t m ( numeric_cast<blas_int_t>( SO ? (*C).rows() : (*C).columns() ) );
176 blas_int_t n ( numeric_cast<blas_int_t>( SO ? (*C).columns() : (*C).rows() ) );
177 blas_int_t k ( numeric_cast<blas_int_t>( min( (*A).rows(), (*A).columns() ) ) );
178 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
179 blas_int_t ldc ( numeric_cast<blas_int_t>( (*C).spacing() ) );
180 blas_int_t info( 0 );
181
182 if( m == 0 || n == 0 || k == 0 ) {
183 return;
184 }
185
186 if( !SO ) {
187 ( side == 'L' )?( side = 'R' ):( side = 'L' );
188 }
189
190 blas_int_t lwork( k*ldc );
191 const std::unique_ptr<ET[]> work( new ET[lwork] );
192 const size_t offset( (*A).rows() - (*A).columns() );
193
194 if( SO ) {
195 unmql( side, trans, m, n, k, (*A).data()+offset, lda, tau, (*C).data(), ldc, work.get(), lwork, &info );
196 }
197 else {
198 unmrq( side, trans, m, n, k, (*A).data(offset), lda, tau, (*C).data(), ldc, work.get(), lwork, &info );
199 }
200
201 BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for Q multiplication" );
202}
203//*************************************************************************************************
204
205} // namespace blaze
206
207#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 unmql wrapper functions.
Header file for the CLAPACK unmrq wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Constraint on the data type.
Constraint on the data type.
Header file for the DenseMatrix base class.
#define BLAZE_CONSTRAINT_MUST_BE_COMPLEX_TYPE(T)
Constraint on the data type.
Definition: Complex.h:62
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
decltype(auto) trans(const DenseMatrix< MT, SO > &dm)
Calculation of the transpose of the given dense matrix.
Definition: DMatTransExpr.h:766
void unmql(DenseMatrix< MT1, SO > &C, const DenseMatrix< MT2, SO > &A, char side, char trans, const ElementType_t< MT2 > *tau)
LAPACK kernel for the multiplication of the double precision Q from a QL decomposition with another m...
Definition: unmql.h:144
void unmrq(char side, char trans, blas_int_t m, blas_int_t n, blas_int_t k, const complex< float > *A, blas_int_t lda, const complex< float > *tau, complex< float > *C, blas_int_t ldc, complex< float > *work, blas_int_t lwork, blas_int_t *info)
LAPACK kernel for the multiplication of the single precision Q from a RQ decomposition with another m...
Definition: unmrq.h:148
#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
#define BLAZE_CONSTRAINT_MUST_HAVE_CONST_DATA_ACCESS(T)
Constraint on the data type.
Definition: ConstDataAccess.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
#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.