getri.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_GETRI_H_
36 #define _BLAZE_MATH_LAPACK_GETRI_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <memory>
44 #include <blaze/math/Aliases.h>
49 #include <blaze/math/Exception.h>
52 #include <blaze/util/Assert.h>
53 #include <blaze/util/NumericCast.h>
54 
55 
56 namespace blaze {
57 
58 //=================================================================================================
59 //
60 // LAPACK LU-BASED INVERSION FUNCTIONS (GETRI)
61 //
62 //=================================================================================================
63 
64 //*************************************************************************************************
67 template< typename MT, bool SO >
68 inline void getri( DenseMatrix<MT,SO>& A, const int* ipiv );
70 //*************************************************************************************************
71 
72 
73 //*************************************************************************************************
108 template< typename MT // Type of the dense matrix
109  , bool SO > // Storage order of the dense matrix
110 inline void getri( DenseMatrix<MT,SO>& A, const int* ipiv )
111 {
116 
117  using ET = ElementType_<MT>;
118 
119  if( !isSquare( ~A ) ) {
120  BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
121  }
122 
123  int n ( numeric_cast<int>( (~A).columns() ) );
124  int lda ( numeric_cast<int>( (~A).spacing() ) );
125  int info( 0 );
126 
127  if( n == 0 ) {
128  return;
129  }
130 
131  int lwork( n*lda );
132  const std::unique_ptr<ET[]> work( new ET[lwork] );
133 
134  getri( n, (~A).data(), lda, ipiv, work.get(), lwork, &info );
135 
136  BLAZE_INTERNAL_ASSERT( info >= 0, "Invalid argument for matrix inversion" );
137 
138  if( info > 0 ) {
139  BLAZE_THROW_LAPACK_ERROR( "Inversion of singular matrix failed" );
140  }
141 }
142 //*************************************************************************************************
143 
144 } // namespace blaze
145 
146 #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.
#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_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
Header file for the CLAPACK getri wrapper functions.
Constraint on the data type.
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
Header file for the exception macros of the math module.
Constraint on the data type.
void getri(int n, float *A, int lda, const int *ipiv, float *work, int lwork, int *info)
LAPACK kernel for the inversion of the given dense general single precision column-major square matri...
Definition: getri.h:131
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
#define BLAZE_THROW_LAPACK_ERROR(MESSAGE)
Macro for the emission of an exception on detection of a LAPACK error.This macro encapsulates the def...
Definition: Exception.h:146
BLAZE_ALWAYS_INLINE bool isSquare(const Matrix< MT, SO > &matrix) noexcept
Checks if the given matrix is a square matrix.
Definition: Matrix.h:742
#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