Blaze  3.6
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>
51 #include <blaze/math/Exception.h>
55 #include <blaze/util/Assert.h>
57 #include <blaze/util/NumericCast.h>
58 
59 
60 namespace blaze {
61 
62 //=================================================================================================
63 //
64 // LAPACK FUNCTIONS TO MULTIPLY Q FROM A QL DECOMPOSITION WITH A MATRIX (UNMQL)
65 //
66 //=================================================================================================
67 
68 //*************************************************************************************************
71 template< typename MT1, bool SO, typename MT2 >
72 void unmql( DenseMatrix<MT1,SO>& C, const DenseMatrix<MT2,SO>& A,
73  char side, char trans, const ElementType_t<MT2>* tau );
75 //*************************************************************************************************
76 
77 
78 //*************************************************************************************************
143 template< 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  int m ( numeric_cast<int>( SO ? (~C).rows() : (~C).columns() ) );
176  int n ( numeric_cast<int>( SO ? (~C).columns() : (~C).rows() ) );
177  int k ( numeric_cast<int>( min( (~A).rows(), (~A).columns() ) ) );
178  int lda ( numeric_cast<int>( (~A).spacing() ) );
179  int ldc ( numeric_cast<int>( (~C).spacing() ) );
180  int 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  int 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
#define BLAZE_THROW_INVALID_ARGUMENT(MESSAGE)
Macro for the emission of a std::invalid_argument exception.This macro encapsulates the default way o...
Definition: Exception.h:235
Constraint on the data type.
Header file for the CLAPACK unmrq wrapper functions.
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
#define BLAZE_CONSTRAINT_MUST_HAVE_CONST_DATA_ACCESS(T)
Constraint on the data type.In case the given data type T does not provide low-level data access to c...
Definition: ConstDataAccess.h:61
MT::ElementType * data(DenseMatrix< MT, SO > &dm) noexcept
Low-level data access to the dense matrix elements.
Definition: DenseMatrix.h:170
void unmrq(char side, char trans, int m, int n, int k, const complex< float > *A, int lda, const complex< float > *tau, complex< float > *C, int ldc, complex< float > *work, int lwork, int *info)
LAPACK kernel for the multiplication of the single precision Q from a RQ decomposition with another m...
Definition: unmrq.h:143
#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.
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.
Namespace of the Blaze C++ math library.
Definition: Blaze.h:58
Header file for the CLAPACK unmql wrapper functions.
#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
void unmql(char side, char trans, int m, int n, int k, const complex< float > *A, int lda, const complex< float > *tau, complex< float > *C, int ldc, complex< float > *work, int lwork, int *info)
LAPACK kernel for the multiplication of the single precision Q from a QL decomposition with another m...
Definition: unmql.h:143
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:1162
Header file for the DenseMatrix base class.
Header file for the exception macros of the math module.
Constraint on the data type.
Header file for run time assertion macros.
Constraint on the data type.
#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
decltype(auto) trans(const DenseMatrix< MT, SO > &dm)
Calculation of the transpose of the given dense matrix.
Definition: DMatTransExpr.h:765
#define BLAZE_CONSTRAINT_MUST_BE_COMPLEX_TYPE(T)
Constraint on the data type.This compile time constraint checks that the given data type T is a compl...
Definition: Complex.h:62
#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