geqlf.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_GEQLF_H_
36 #define _BLAZE_MATH_LAPACK_GEQLF_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <boost/cast.hpp>
45 #include <blaze/math/Aliases.h>
53 #include <blaze/util/Assert.h>
54 
55 
56 namespace blaze {
57 
58 //=================================================================================================
59 //
60 // LAPACK QL DECOMPOSITION FUNCTIONS (GEQLF)
61 //
62 //=================================================================================================
63 
64 //*************************************************************************************************
67 template< typename MT, bool SO >
68 inline void geqlf( DenseMatrix<MT,SO>& A, ElementType_<MT>* tau );
70 //*************************************************************************************************
71 
72 
73 //*************************************************************************************************
115 template< typename MT // Type of the dense matrix
116  , bool SO > // Storage order of the dense matrix
118 {
119  using boost::numeric_cast;
120 
125 
126  typedef ElementType_<MT> ET;
127 
128  int m ( numeric_cast<int>( SO ? (~A).rows() : (~A).columns() ) );
129  int n ( numeric_cast<int>( SO ? (~A).columns() : (~A).rows() ) );
130  int lda ( numeric_cast<int>( (~A).spacing() ) );
131  int info( 0 );
132 
133  if( m == 0 || n == 0 ) {
134  return;
135  }
136 
137  int lwork( n*lda );
138  const std::unique_ptr<ET[]> work( new ET[lwork] );
139 
140  if( SO ) {
141  geqlf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
142  }
143  else {
144  gerqf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
145  }
146 
147  BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for QL decomposition" );
148 }
149 //*************************************************************************************************
150 
151 } // namespace blaze
152 
153 #endif
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
void gerqf(int m, int n, float *A, int lda, float *tau, float *work, int lwork, int *info)
LAPACK kernel for the RQ decomposition of the given dense single precision column-major matrix...
Definition: gerqf.h:144
#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.
#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
Constraint on the data type.
Header file for the CLAPACK geqlf wrapper functions.
Namespace of the Blaze C++ math library.
Definition: Blaze.h:57
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
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
Constraint on the data type.
Header file for the CLAPACK gerqf wrapper functions.
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
void geqlf(int m, int n, float *A, int lda, float *tau, float *work, int lwork, int *info)
LAPACK kernel for the QL decomposition of the given dense single precision column-major matrix...
Definition: geqlf.h:144
#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