Blaze 3.9
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 <blaze/math/Aliases.h>
54#include <blaze/util/Assert.h>
57
58
59namespace blaze {
60
61//=================================================================================================
62//
63// LAPACK TRIANGULAR LINEAR SYSTEM FUNCTIONS (TRSV)
64//
65//=================================================================================================
66
67//*************************************************************************************************
70template< typename MT, bool SO, typename VT, bool TF >
71void trsv( const DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& b, char uplo, char trans, char diag );
73//*************************************************************************************************
74
75
76//*************************************************************************************************
165template< 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
169inline void trsv( const DenseMatrix<MT,SO>& A, DenseVector<VT,TF>& b, char uplo, char trans, char diag )
170{
176
181
182 if( !isSquare( *A ) ) {
183 BLAZE_THROW_INVALID_ARGUMENT( "Invalid non-square matrix provided" );
184 }
185
186 if( (*b).size() != (*A).rows() ) {
187 BLAZE_THROW_INVALID_ARGUMENT( "Invalid right-hand side vector provided" );
188 }
189
190 if( uplo != 'L' && uplo != 'U' ) {
191 BLAZE_THROW_INVALID_ARGUMENT( "Invalid uplo argument provided" );
192 }
193
194 if( trans != 'N' && trans != 'T' && trans != 'C' ) {
195 BLAZE_THROW_INVALID_ARGUMENT( "Invalid trans argument provided" );
196 }
197
198 if( diag != 'U' && diag != 'N' ) {
199 BLAZE_THROW_INVALID_ARGUMENT( "Invalid diag argument provided" );
200 }
201
202 blas_int_t n ( numeric_cast<blas_int_t>( (*A).rows() ) );
203 blas_int_t lda ( numeric_cast<blas_int_t>( (*A).spacing() ) );
204 blas_int_t incX( 1 );
205
206 if( n == 0 ) {
207 return;
208 }
209
210 if( IsRowMajorMatrix_v<MT> ) {
211 ( uplo == 'L' )?( uplo = 'U' ):( uplo = 'L' );
212 }
213
214 trsv( uplo, trans, diag, n, (*A).data(), lda, (*b).data(), incX );
215}
216//*************************************************************************************************
217
218} // namespace blaze
219
220#endif
Constraint on the data type.
Header file for auxiliary alias declarations.
typename T::ElementType ElementType_t
Alias declaration for nested ElementType type definitions.
Definition: Aliases.h:190
Header file for run time assertion macros.
Constraint on the data type.
Constraint on the data type.
Header file for the IsRowMajorMatrix type trait.
Constraint on the data type.
Cast operators for numeric types.
Data type constraint.
Header file for the CLAPACK trsv wrapper functions.
Base class for dense matrices.
Definition: DenseMatrix.h:82
Base class for N-dimensional dense vectors.
Definition: DenseVector.h:77
Constraint on the data type.
Header file for the DenseMatrix base class.
Header file for the DenseVector base class.
#define BLAZE_CONSTRAINT_MUST_BE_SAME_TYPE(A, B)
Data type constraint.
Definition: SameType.h:71
decltype(auto) trans(const DenseMatrix< MT, SO > &dm)
Calculation of the transpose of the given dense matrix.
Definition: DMatTransExpr.h:766
void trsv(const DenseMatrix< MT, SO > &A, DenseVector< VT, TF > &b, char uplo, char trans, char diag)
LAPACK kernel for solving a triangular linear system of equations ( ). ( ).
Definition: trsv.h:169
#define BLAZE_CONSTRAINT_MUST_BE_BLAS_COMPATIBLE_TYPE(T)
Constraint on the data type.
Definition: BLASCompatible.h:61
#define BLAZE_CONSTRAINT_MUST_BE_CONTIGUOUS_TYPE(T)
Constraint on the data type.
Definition: Contiguous.h:61
#define BLAZE_CONSTRAINT_MUST_NOT_BE_COMPUTATION_TYPE(T)
Constraint on the data type.
Definition: Computation.h:81
#define BLAZE_CONSTRAINT_MUST_NOT_BE_ADAPTOR_TYPE(T)
Constraint on the data type.
Definition: Adaptor.h:81
#define BLAZE_CONSTRAINT_MUST_HAVE_MUTABLE_DATA_ACCESS(T)
Constraint on the data type.
Definition: MutableDataAccess.h:61
int32_t blas_int_t
Signed integer type used in the BLAS/LAPACK wrapper functions.
Definition: Types.h:64
bool isSquare(const Matrix< MT, SO > &matrix) noexcept
Checks if the given matrix is a square matrix.
Definition: Matrix.h:1383
#define BLAZE_THROW_INVALID_ARGUMENT(MESSAGE)
Macro for the emission of a std::invalid_argument exception.
Definition: Exception.h:235
Header file for the exception macros of the math module.