gerqf.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_GERQF_H_
36 #define _BLAZE_MATH_LAPACK_GERQF_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <blaze/math/Aliases.h>
52 #include <blaze/util/Assert.h>
53 #include <blaze/util/NumericCast.h>
54 
55 
56 namespace blaze {
57 
58 //=================================================================================================
59 //
60 // LAPACK RQ DECOMPOSITION FUNCTIONS (GERQF)
61 //
62 //=================================================================================================
63 
64 //*************************************************************************************************
67 template< typename MT, bool SO >
68 inline void gerqf( DenseMatrix<MT,SO>& A, ElementType_<MT>* tau );
70 //*************************************************************************************************
71 
72 
73 //*************************************************************************************************
116 template< typename MT // Type of the dense matrix
117  , bool SO > // Storage order of the dense matrix
119 {
124 
125  using ET = ElementType_<MT>;
126 
127  int m ( numeric_cast<int>( SO ? (~A).rows() : (~A).columns() ) );
128  int n ( numeric_cast<int>( SO ? (~A).columns() : (~A).rows() ) );
129  int lda ( numeric_cast<int>( (~A).spacing() ) );
130  int info( 0 );
131 
132  if( m == 0 || n == 0 ) {
133  return;
134  }
135 
136  int lwork( ( SO ? m : n ) * lda );
137  const std::unique_ptr<ET[]> work( new ET[lwork] );
138 
139  if( SO ) {
140  gerqf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
141  }
142  else {
143  geqlf( m, n, (~A).data(), lda, tau, work.get(), lwork, &info );
144  }
145 
146  BLAZE_INTERNAL_ASSERT( info == 0, "Invalid argument for RQ decomposition" );
147 }
148 //*************************************************************************************************
149 
150 } // namespace blaze
151 
152 #endif
Constraint on the data type.
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
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:147
#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.
Cast operators for numeric types.
#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:78
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:110
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:340
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:324
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:147
#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