unmlq.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_UNMLQ_H_
36 #define _BLAZE_MATH_LAPACK_UNMLQ_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <boost/cast.hpp>
45 #include <blaze/math/Aliases.h>
50 #include <blaze/math/Exception.h>
54 #include <blaze/util/Assert.h>
56 
57 
58 namespace blaze {
59 
60 //=================================================================================================
61 //
62 // LAPACK FUNCTIONS TO MULTIPLY Q FROM A LQ DECOMPOSITION WITH A MATRIX (UNMLQ)
63 //
64 //=================================================================================================
65 
66 //*************************************************************************************************
69 template< typename MT1, bool SO, typename MT2 >
70 inline void unmlq( DenseMatrix<MT1,SO>& C, const DenseMatrix<MT2,SO>& A,
71  char side, char trans, const ElementType_<MT2>* tau );
73 //*************************************************************************************************
74 
75 
76 //*************************************************************************************************
132 template< typename MT1, bool SO, typename MT2 >
134  char side, char trans, const ElementType_<MT2>* tau )
135 {
136  using boost::numeric_cast;
137 
143 
149 
150  typedef ElementType_<MT1> ET;
151 
152  if( (~A).rows() > (~A).columns() ) {
153  BLAZE_THROW_INVALID_ARGUMENT( "Invalid size of Q matrix" );
154  }
155 
156  if( side != 'L' && side != 'R' ) {
157  BLAZE_THROW_INVALID_ARGUMENT( "Invalid side argument provided" );
158  }
159 
160  if( trans != 'N' && trans != 'C' ) {
161  BLAZE_THROW_INVALID_ARGUMENT( "Invalid trans argument provided" );
162  }
163 
164  int m ( numeric_cast<int>( SO ? (~C).rows() : (~C).columns() ) );
165  int n ( numeric_cast<int>( SO ? (~C).columns() : (~C).rows() ) );
166  int k ( numeric_cast<int>( min( (~A).rows(), (~A).columns() ) ) );
167  int lda ( numeric_cast<int>( (~A).spacing() ) );
168  int ldc ( numeric_cast<int>( (~C).spacing() ) );
169  int info( 0 );
170 
171  if( m == 0 || n == 0 || k == 0 ) {
172  return;
173  }
174 
175  if( !SO ) {
176  ( side == 'L' )?( side = 'R' ):( side = 'L' );
177  }
178 
179  int lwork( k*ldc );
180  const std::unique_ptr<ET[]> work( new ET[lwork] );
181 
182  if( SO ) {
183  unmlq( side, trans, m, n, k, (~A).data(), lda, tau, (~C).data(), ldc, work.get(), lwork, &info );
184  }
185  else {
186  unmqr( side, trans, m, n, k, (~A).data(), lda, tau, (~C).data(), ldc, work.get(), lwork, &info );
187  }
188 
189  BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for Q multiplication" );
190 }
191 //*************************************************************************************************
192 
193 } // namespace blaze
194 
195 #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 auxiliary alias declarations.
Log level for high-level information.
Definition: LogLevel.h:80
#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
#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.
const ElementType_< MT > min(const DenseMatrix< MT, SO > &dm)
Returns the smallest element of the dense matrix.
Definition: DenseMatrix.h:1669
Constraint on the data type.
#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:70
constexpr bool spacing
Adding an additional spacing line between two log messages.This setting gives the opportunity to add ...
Definition: Logging.h:70
Header file for the CLAPACK unmqr wrapper functions.
Constraint on the data type.
Namespace of the Blaze C++ math library.
Definition: Blaze.h:57
void unmqr(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 QR decomposition with another m...
Definition: unmqr.h:135
Header file for the DenseMatrix base class.
void unmlq(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 complex Q from a LQ decomposition with a...
Definition: unmlq.h:135
typename T::ElementType ElementType_
Alias declaration for nested ElementType type definitions.The ElementType_ alias declaration provides...
Definition: Aliases.h:163
BLAZE_ALWAYS_INLINE size_t columns(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of columns of the matrix.
Definition: Matrix.h:330
Header file for the exception macros of the math module.
Header file for the CLAPACK unmlq wrapper functions.
Constraint on the data type.
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
BLAZE_ALWAYS_INLINE size_t rows(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of rows of the matrix.
Definition: Matrix.h:314
#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
const DMatTransExpr< MT,!SO > trans(const DenseMatrix< MT, SO > &dm)
Calculation of the transpose of the given dense matrix.
Definition: DMatTransExpr.h:950
#define BLAZE_INTERNAL_ASSERT(expr, msg)
Run time assertion macro for internal checks.In case of an invalid run time expression, the program execution is terminated. The BLAZE_INTERNAL_ASSERT macro can be disabled by setting the BLAZE_USER_ASSERTION flag to zero or by defining NDEBUG during the compilation.
Definition: Assert.h:101