35 #ifndef _BLAZE_MATH_EXPRESSIONS_SMATSMATSUBEXPR_H_
36 #define _BLAZE_MATH_EXPRESSIONS_SMATSMATSUBEXPR_H_
84 template<
typename MT1
86 class SMatSMatSubExpr :
public SparseMatrix< SMatSMatSubExpr<MT1,MT2>, false >
87 ,
private MatMatSubExpr
136 enum { smpAssignable = 0 };
184 return lhs_.columns();
194 return lhs_.nonZeros() +
rhs_.nonZeros();
205 return lhs_.nonZeros(i) +
rhs_.nonZeros(i);
235 template<
typename T >
237 return (
lhs_.canAlias( alias ) ||
rhs_.canAlias( alias ) );
247 template<
typename T >
249 return (
lhs_.isAliased( alias ) ||
rhs_.isAliased( alias ) );
271 template<
typename MT
296 for(
size_t i=0UL; i<(~lhs).
rows(); ++i ) {
297 const RightIterator end( B.end(i) );
298 for( RightIterator element=B.begin(i); element!=end; ++element ) {
299 if(
isDefault( (~lhs)(i,element->index()) ) )
300 (~lhs)(i,element->index()) = -element->value();
302 (~lhs)(i,element->index()) -= element->value();
322 template<
typename MT >
344 (~lhs).reserve( A.nonZeros() + B.nonZeros() );
347 for(
size_t i=0UL; i<(~lhs).
rows(); ++i )
349 const LeftIterator lend( A.end(i) );
350 const RightIterator rend( B.end(i) );
352 LeftIterator l( A.begin(i) );
353 RightIterator r( B.begin(i) );
355 while( l != lend && r != rend )
357 if( l->index() < r->index() ) {
358 (~lhs).append( i, l->index(), l->value() );
361 else if( l->index() > r->index() ) {
362 (~lhs).append( i, r->index(), -r->value() );
366 (~lhs).append( i, l->index(), l->value()-r->value() );
373 (~lhs).append( i, l->index(), l->value() );
378 (~lhs).append( i, r->index(), -r->value() );
382 (~lhs).finalize( i );
400 template<
typename MT >
421 const size_t m( rhs.rows() );
422 const size_t n( rhs.columns() );
425 std::vector<size_t> nonzeros( n, 0UL );
426 for(
size_t i=0UL; i<m; ++i )
428 const LeftIterator lend( A.end(i) );
429 const RightIterator rend( B.end(i) );
431 LeftIterator l( A.begin(i) );
432 RightIterator r( B.begin(i) );
434 while( l != lend && r != rend )
436 if( l->index() < r->index() ) {
437 ++nonzeros[l->index()];
440 else if( l->index() > r->index() ) {
441 ++nonzeros[r->index()];
445 ++nonzeros[l->index()];
452 ++nonzeros[l->index()];
457 ++nonzeros[r->index()];
463 for(
size_t j=0UL; j<n; ++j ) {
464 (~lhs).reserve( j, nonzeros[j] );
468 for(
size_t i=0UL; i<m; ++i )
470 const LeftIterator lend( A.end(i) );
471 const RightIterator rend( B.end(i) );
473 LeftIterator l( A.begin(i) );
474 RightIterator r( B.begin(i) );
476 while( l != lend && r != rend )
478 if( l->index() < r->index() ) {
479 (~lhs).append( i, l->index(), l->value() );
482 else if( l->index() > r->index() ) {
483 (~lhs).append( i, r->index(), -r->value() );
487 (~lhs).append( i, l->index(), l->value()-r->value() );
494 (~lhs).append( i, l->index(), l->value() );
499 (~lhs).append( i, r->index(), -r->value() );
519 template<
typename MT
550 template<
typename MT
623 template<
typename T1
625 inline const SMatSMatSubExpr<T1,T2>
631 throw std::invalid_argument(
"Matrix sizes do not match" );
648 template<
typename MT1,
typename MT2,
bool AF >
649 struct SubmatrixExprTrait< SMatSMatSubExpr<MT1,MT2>, AF >
653 typedef typename SubExprTrait< typename SubmatrixExprTrait<const MT1,AF>::Type
654 ,
typename SubmatrixExprTrait<const MT2,AF>::Type >::Type Type;
663 template<
typename MT1,
typename MT2 >
664 struct RowExprTrait< SMatSMatSubExpr<MT1,MT2> >
668 typedef typename SubExprTrait< typename RowExprTrait<const MT1>::Type
669 ,
typename RowExprTrait<const MT2>::Type >::Type Type;
678 template<
typename MT1,
typename MT2 >
679 struct ColumnExprTrait< SMatSMatSubExpr<MT1,MT2> >
683 typedef typename SubExprTrait< typename ColumnExprTrait<const MT1>::Type
684 ,
typename ColumnExprTrait<const MT2>::Type >::Type Type;
MT2::CompositeType CT2
Composite type of the right-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:97
Compile time check whether the given type is a temporary vector or matrix type.This type trait class ...
Definition: IsTemporary.h:87
Header file for the subtraction trait.
size_t nonZeros(size_t i) const
Returns the number of non-zero elements in the specified row.
Definition: SMatSMatSubExpr.h:204
LeftOperand leftOperand() const
Returns the left-hand side sparse matrix operand.
Definition: SMatSMatSubExpr.h:214
void smpSubAssign(DenseMatrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the SMP subtraction assignment of a matrix to dense matrix.
Definition: DenseMatrix.h:151
bool canAlias(const T *alias) const
Returns whether the expression can alias with the given address alias.
Definition: SMatSMatSubExpr.h:236
bool isDefault(const DynamicMatrix< Type, SO > &m)
Returns whether the given dense matrix is in default state.
Definition: DynamicMatrix.h:4622
Efficient implementation of a compressed matrix.The CompressedMatrix class template is the represent...
Definition: CompressedMatrix.h:197
Header file for the ColumnExprTrait class template.
MT2::ReturnType RN2
ReturnType type of the right-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:95
size_t nonZeros() const
Returns the number of non-zero elements in the sparse matrix.
Definition: SMatSMatSubExpr.h:193
SelectType< IsExpression< MT1 >::value, const MT1, const MT1 & >::Type LeftOperand
Composite type of the left-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:128
const This & CompositeType
Data type for composite expression templates.
Definition: CompressedMatrix.h:2384
Type ElementType
Type of the sparse matrix elements.
Definition: CompressedMatrix.h:249
SMatSMatSubExpr< MT1, MT2 > This
Type of this SMatSMatSubExpr instance.
Definition: SMatSMatSubExpr.h:115
const SelectType< returnExpr, ExprReturnType, ElementType >::Type ReturnType
Return type for expression template evaluations.
Definition: SMatSMatSubExpr.h:122
ResultType::OppositeType OppositeType
Result type with opposite storage order for expression template evaluations.
Definition: SMatSMatSubExpr.h:117
ResultType::ElementType ElementType
Resulting element type.
Definition: SMatSMatSubExpr.h:119
Header file for the Computation base class.
Header file for the RequiresEvaluation type trait.
size_t columns() const
Returns the current number of columns of the matrix.
Definition: SMatSMatSubExpr.h:183
const ResultType CompositeType
Data type for composite expression templates.
Definition: SMatSMatSubExpr.h:125
Base class for dense matrices.The DenseMatrix class is a base class for all dense matrix classes...
Definition: DenseMatrix.h:70
Base class for sparse matrices.The SparseMatrix class is a base class for all sparse matrix classes...
Definition: Forward.h:104
MT1::ReturnType RN1
ReturnType type of the left-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:94
Header file for the SparseMatrix base class.
Constraint on the data type.
void smpAddAssign(DenseMatrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the SMP addition assignment of a matrix to a dense matrix.
Definition: DenseMatrix.h:121
RightOperand rightOperand() const
Returns the right-hand side sparse matrix operand.
Definition: SMatSMatSubExpr.h:224
Compile time type selection.The SelectType class template selects one of the two given types T1 and T...
Definition: SelectType.h:59
Header file for the IsTemporary type trait class.
SubTrait< RT1, RT2 >::Type ResultType
Result type for expression template evaluations.
Definition: SMatSMatSubExpr.h:116
ReturnType operator()(size_t i, size_t j) const
2D-access to the matrix elements.
Definition: SMatSMatSubExpr.h:161
const Element * ConstIterator
Iterator over constant elements.
Definition: CompressedMatrix.h:2388
Header file for the dense matrix SMP implementation.
void assign(Matrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the assignment of a matrix to a matrix.
Definition: Matrix.h:179
Header file for the MatMatSubExpr base class.
LeftOperand lhs_
Left-hand side sparse matrix of the subtraction expression.
Definition: SMatSMatSubExpr.h:255
MT1::CompositeType CT1
Composite type of the left-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:96
Constraints on the storage order of matrix types.
Evaluation of the return type of a subtraction expression.Via this type trait it is possible to evalu...
Definition: SubExprTrait.h:103
Header file for the SelectType class template.
Header file for the RowExprTrait class template.
Header file for all forward declarations for expression class templates.
bool isAliased(const T *alias) const
Returns whether the expression is aliased with the given address alias.
Definition: SMatSMatSubExpr.h:248
Compile time check for resizable data types.This type trait tests whether the given data type is a re...
Definition: IsResizable.h:75
Header file for the SubmatrixExprTrait class template.
#define BLAZE_CONSTRAINT_MUST_BE_ROW_MAJOR_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not a row-major dense or sparse matrix t...
Definition: StorageOrder.h:81
const Type & ReturnType
Return type for expression template evaluations.
Definition: CompressedMatrix.h:2383
Removal of reference modifiers.The RemoveCV type trait removes any reference modifiers from the given...
Definition: RemoveReference.h:69
RightOperand rhs_
Right-hand side sparse matrix of the subtraction expression.
Definition: SMatSMatSubExpr.h:256
Header file for run time assertion macros.
Expression object for sparse matrix-sparse matrix subtractions.The SMatSMatSubExpr class represents t...
Definition: Forward.h:95
void addAssign(Matrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the addition assignment of a matrix to a matrix.
Definition: Matrix.h:209
const DenseIterator< Type > operator-(const DenseIterator< Type > &it, ptrdiff_t inc)
Subtraction between a DenseIterator and an integral value.
Definition: DenseIterator.h:585
SubExprTrait< RN1, RN2 >::Type ExprReturnType
Expression return type for the subscript operator.
Definition: SMatSMatSubExpr.h:110
void subAssign(Matrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the subtraction assignment of a matrix to matrix.
Definition: Matrix.h:239
Header file for the isDefault shim.
MT2::ResultType RT2
Result type of the right-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:93
SelectType< IsExpression< MT2 >::value, const MT2, const MT2 & >::Type RightOperand
Composite type of the right-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:131
ResultType::TransposeType TransposeType
Transpose type for expression template evaluations.
Definition: SMatSMatSubExpr.h:118
Header file for the RemoveReference type trait.
Header file for the IsComputation type trait class.
size_t rows() const
Returns the current number of rows of the matrix.
Definition: SMatSMatSubExpr.h:173
#define BLAZE_FUNCTION_TRACE
Function trace macro.This macro can be used to reliably trace function calls. In case function tracin...
Definition: FunctionTrace.h:157
This ResultType
Result type for expression template evaluations.
Definition: CompressedMatrix.h:2379
size_t columns(const Matrix< MT, SO > &m)
Returns the current number of columns of the matrix.
Definition: Matrix.h:154
MT1::ResultType RT1
Result type of the left-hand side sparse matrix expression.
Definition: SMatSMatSubExpr.h:92
Header file for basic type definitions.
Base template for the SubTrait class.
Definition: SubTrait.h:141
Header file for the IsResizable type trait.
Header file for the SubExprTrait class template.
SMatSMatSubExpr(const MT1 &lhs, const MT2 &rhs)
Constructor for the SMatSMatSubExpr class.
Definition: SMatSMatSubExpr.h:145
size_t rows(const Matrix< MT, SO > &m)
Returns the current number of rows of the matrix.
Definition: Matrix.h:138
#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
#define BLAZE_CONSTRAINT_MUST_BE_SPARSE_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not a sparse, N-dimensional matrix type...
Definition: SparseMatrix.h:79
Header file for the IsExpression type trait class.
Header file for the FunctionTrace class.