trsv.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_TRSV_H_
36 #define _BLAZE_MATH_LAPACK_TRSV_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <boost/cast.hpp>
44 #include <blaze/math/Aliases.h>
49 #include <blaze/math/Exception.h>
54 #include <blaze/util/Assert.h>
56 
57 
58 namespace blaze {
59 
60 //=================================================================================================
61 //
62 // LAPACK TRIANGULAR LINEAR SYSTEM FUNCTIONS (TRSV)
63 //
64 //=================================================================================================
65 
66 //*************************************************************************************************
69 template< typename MT, bool SO, typename VT, bool TF >
70 inline void trsv( const DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& b,
71  char uplo, char trans, char diag );
73 //*************************************************************************************************
74 
75 
76 //*************************************************************************************************
165 template< typename MT // Type of the system matrix
166  , bool SO // Storage order of the system matrix
167  , typename VT // Type of the right-hand side vector
168  , bool TF > // Transpose flag of the right-hand side vector
169 inline void trsv( const DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& b, char uplo, char trans, char diag )
170 {
171  using boost::numeric_cast;
172 
177 
178  if( !isSquare( ~A ) ) {
179  BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
180  }
181 
182  if( (~b).size() != (~A).rows() ) {
183  BLAZE_THROW_INVALID_ARGUMENT( "Invalid right-hand side vector provided" );
184  }
185 
186  if( uplo != 'L' && uplo != 'U' ) {
187  BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
188  }
189 
190  if( trans != 'N' && trans != 'T' && trans != 'C' ) {
191  BLAZE_THROW_INVALID_ARGUMENT( "Invalid trans argument provided" );
192  }
193 
194  if( diag != 'U' && diag != 'N' ) {
195  BLAZE_THROW_INVALID_ARGUMENT( "Invalid diag argument provided" );
196  }
197 
198  int n ( numeric_cast<int>( (~A).rows() ) );
199  int lda ( numeric_cast<int>( (~A).spacing() ) );
200  int incX( 1 );
201 
202  if( n == 0 ) {
203  return;
204  }
205 
207  ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
208  }
209 
210  trsv( uplo, trans, diag, n, (~A).data(), lda, (~b).data(), incX );
211 }
212 //*************************************************************************************************
213 
214 } // namespace blaze
215 
216 #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.
Data type constraint.
#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
BLAZE_ALWAYS_INLINE size_t size(const Vector< VT, TF > &vector) noexcept
Returns the current size/dimension of the vector.
Definition: Vector.h:261
#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
void trsv(char uplo, char trans, char diag, int n, const float *A, int lda, float *x, int incX)
LAPACK kernel for solving a triangular single precision linear system of equations ( )...
Definition: trsv.h:130
Header file for the DenseVector base class.
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: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
Base class for N-dimensional dense vectors.The DenseVector class is a base class for all arbitrarily ...
Definition: DenseVector.h:70
Header file for the exception macros of the math module.
Header file for the CLAPACK trsv 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: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
BLAZE_ALWAYS_INLINE bool isSquare(const Matrix< MT, SO > &matrix) noexcept
Checks if the given matrix is a square matrix.
Definition: Matrix.h:677