ormrq.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_ORMRQ_H_
36 #define _BLAZE_MATH_LAPACK_ORMRQ_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <boost/cast.hpp>
45 #include <blaze/math/Aliases.h>
51 #include <blaze/math/Exception.h>
56 #include <blaze/util/Assert.h>
58 #include <blaze/util/mpl/Xor.h>
59 
60 
61 namespace blaze {
62 
63 //=================================================================================================
64 //
65 // LAPACK FUNCTIONS TO MULTIPLY Q FROM A RQ DECOMPOSITION WITH A MATRIX (ORMRQ)
66 //
67 //=================================================================================================
68 
69 //*************************************************************************************************
72 template< typename MT1, bool SO1, typename MT2, bool SO2 >
73 inline void ormrq( DenseMatrix<MT1,SO1>& C, const DenseMatrix<MT2,SO2>& A,
74  char side, char trans, const ElementType_<MT2>* tau );
76 //*************************************************************************************************
77 
78 
79 //*************************************************************************************************
144 template< typename MT1, bool SO1, typename MT2, bool SO2 >
146  char side, char trans, const ElementType_<MT2>* tau )
147 {
148  using boost::numeric_cast;
149 
155 
161 
162  using ET = ElementType_<MT1>;
163 
164  if( (~A).rows() < (~A).columns() ) {
165  BLAZE_THROW_INVALID_ARGUMENT( "Invalid size of Q matrix" );
166  }
167 
168  if( side != 'L' && side != 'R' ) {
169  BLAZE_THROW_INVALID_ARGUMENT( "Invalid side argument provided" );
170  }
171 
172  if( trans != 'N' && trans != 'T' ) {
173  BLAZE_THROW_INVALID_ARGUMENT( "Invalid trans argument provided" );
174  }
175 
176  int m ( numeric_cast<int>( SO1 ? (~C).rows() : (~C).columns() ) );
177  int n ( numeric_cast<int>( SO1 ? (~C).columns() : (~C).rows() ) );
178  int k ( numeric_cast<int>( min( (~A).rows(), (~A).columns() ) ) );
179  int lda ( numeric_cast<int>( (~A).spacing() ) );
180  int ldc ( numeric_cast<int>( (~C).spacing() ) );
181  int info( 0 );
182 
183  if( m == 0 || n == 0 || k == 0 ) {
184  return;
185  }
186 
188  ( side == 'L' )?( side = 'R' ):( side = 'L' );
189  }
190 
192  ( trans == 'N' )?( trans = 'T' ):( trans = 'N' );
193  }
194 
195  int lwork( k*ldc );
196  const std::unique_ptr<ET[]> work( new ET[lwork] );
197  const size_t offset( (~A).rows() - (~A).columns() );
198 
199  if( SO2 ) {
200  ormrq( side, trans, m, n, k, (~A).data()+offset, lda, tau, (~C).data(), ldc, work.get(), lwork, &info );
201  }
202  else {
203  ormql( side, trans, m, n, k, (~A).data(offset), lda, tau, (~C).data(), ldc, work.get(), lwork, &info );
204  }
205 
206  BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for Q multiplication" );
207 }
208 //*************************************************************************************************
209 
210 } // namespace blaze
211 
212 #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.
BLAZE_ALWAYS_INLINE size_t spacing(const DenseMatrix< MT, SO > &dm) noexcept
Returns the spacing between the beginning of two rows/columns.
Definition: DenseMatrix.h:102
Header file for auxiliary alias declarations.
void ormql(char side, char trans, int m, int n, int k, const float *A, int lda, const float *tau, float *C, int ldc, float *work, int lwork, int *info)
LAPACK kernel for the multiplication of the single precision Q from a QL decomposition with another m...
Definition: ormql.h:126
#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
Header file for the CLAPACK ormrq wrapper functions.
#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
const ElementType_< MT > min(const DenseMatrix< MT, SO > &dm)
Returns the smallest element of the dense matrix.
Definition: DenseMatrix.h:1755
Constraint on the data type.
void ormrq(char side, char trans, int m, int n, int k, const float *A, int lda, const float *tau, float *C, int ldc, float *work, int lwork, int *info)
LAPACK kernel for the multiplication of the single precision Q from a RQ decomposition with another m...
Definition: ormrq.h:126
#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:71
Constraint on the data type.
Namespace of the Blaze C++ math library.
Definition: Blaze.h:57
Compile time check for row-major matrix types.This type trait tests whether or not the given template...
Definition: IsRowMajorMatrix.h:83
Header file for the DenseMatrix base class.
typename T::ElementType ElementType_
Alias declaration for nested ElementType type definitions.The ElementType_ alias declaration provides...
Definition: Aliases.h:163
Header file for the CLAPACK ormql wrapper functions.
BLAZE_ALWAYS_INLINE size_t columns(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of columns of the matrix.
Definition: Matrix.h:336
Header file for the exception macros of the math module.
Constraint on the data type.
Compile time logical xor evaluation.The Xor class template performs at compile time a logical xor eva...
Definition: Xor.h:74
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
#define BLAZE_CONSTRAINT_MUST_BE_BUILTIN_TYPE(T)
Constraint on the data type.In case the given data type T is not a built-in data type, a compilation error is created.
Definition: Builtin.h:60
BLAZE_ALWAYS_INLINE size_t rows(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of rows of the matrix.
Definition: Matrix.h:320
Header file for the IsRowMajorMatrix type trait.
const DMatTransExpr< MT,!SO > trans(const DenseMatrix< MT, SO > &dm)
Calculation of the transpose of the given dense matrix.
Definition: DMatTransExpr.h:733
#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
Constraint on the data type.
Header file for the Xor class template.