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SVecDVecCrossExpr.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_EXPRESSIONS_SVECDVECCROSSEXPR_H_
36 #define _BLAZE_MATH_EXPRESSIONS_SVECDVECCROSSEXPR_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <stdexcept>
58 #include <blaze/util/Assert.h>
61 #include <blaze/util/SelectType.h>
62 #include <blaze/util/Types.h>
63 
64 
65 namespace blaze {
66 
67 //=================================================================================================
68 //
69 // CLASS SVECDVECCROSSEXPR
70 //
71 //=================================================================================================
72 
73 //*************************************************************************************************
80 template< typename VT1 // Type of the left-hand side sparse vector
81  , typename VT2 > // Type of the right-hand side dense vector
82 class SVecDVecCrossExpr : public DenseVector< SVecDVecCrossExpr<VT1,VT2>, false >
83  , private CrossExpr
84  , private Computation
85 {
86  private:
87  //**Type definitions****************************************************************************
88  typedef typename VT1::ResultType RT1;
89  typedef typename VT2::ResultType RT2;
90  typedef typename VT1::ReturnType RN1;
91  typedef typename VT2::ReturnType RN2;
92  typedef typename VT1::CompositeType CT1;
93  typedef typename VT2::CompositeType CT2;
94  typedef typename VT1::ElementType ET1;
95  typedef typename VT2::ElementType ET2;
96  //**********************************************************************************************
97 
98  //**Return type evaluation**********************************************************************
100 
105  enum { returnExpr = !IsTemporary<RN1>::value && !IsTemporary<RN2>::value };
106 
110  //**********************************************************************************************
111 
112  public:
113  //**Type definitions****************************************************************************
118 
121 
123  typedef const ResultType CompositeType;
124 
126  typedef typename SelectType< IsExpression<VT1>::value, const VT1, const VT1& >::Type LeftOperand;
127 
129  typedef typename SelectType< IsExpression<VT2>::value, const VT2, const VT2& >::Type RightOperand;
130 
133 
136  //**********************************************************************************************
137 
138  //**Compilation flags***************************************************************************
140  enum { vectorizable = 0 };
141 
143  enum { smpAssignable = 0 };
144  //**********************************************************************************************
145 
146  //**Constructor*********************************************************************************
152  explicit inline SVecDVecCrossExpr( const VT1& lhs, const VT2& rhs )
153  : lhs_( lhs ) // Left-hand side sparse vector of the cross product expression
154  , rhs_( rhs ) // Right-hand side dense vector of the cross product expression
155  {
156  BLAZE_INTERNAL_ASSERT( lhs.size() == 3UL, "Invalid vector size" );
157  BLAZE_INTERNAL_ASSERT( rhs.size() == 3UL, "Invalid vector size" );
158  }
159  //**********************************************************************************************
160 
161  //**Subscript operator**************************************************************************
167  inline ReturnType operator[]( size_t index ) const {
168  BLAZE_INTERNAL_ASSERT( index < 3UL, "Invalid vector access index" );
169 
170  if( index == 0UL )
171  return lhs_[1UL] * rhs_[2UL] - lhs_[2UL] * rhs_[1UL];
172  else if( index == 1UL )
173  return lhs_[2UL] * rhs_[0UL] - lhs_[0UL] * rhs_[2UL];
174  else
175  return lhs_[0UL] * rhs_[1UL] - lhs_[1UL] * rhs_[0UL];
176  }
177  //**********************************************************************************************
178 
179  //**Size function*******************************************************************************
184  inline size_t size() const {
185  return 3UL;
186  }
187  //**********************************************************************************************
188 
189  //**Left operand access*************************************************************************
194  inline LeftOperand leftOperand() const {
195  return lhs_;
196  }
197  //**********************************************************************************************
198 
199  //**Right operand access************************************************************************
204  inline RightOperand rightOperand() const {
205  return rhs_;
206  }
207  //**********************************************************************************************
208 
209  //**********************************************************************************************
215  template< typename T >
216  inline bool canAlias( const T* alias ) const {
217  return ( lhs_.canAlias( alias ) || rhs_.canAlias( alias ) );
218  }
219  //**********************************************************************************************
220 
221  //**********************************************************************************************
227  template< typename T >
228  inline bool isAliased( const T* alias ) const {
229  return ( lhs_.isAliased( alias ) || rhs_.isAliased( alias ) );
230  }
231  //**********************************************************************************************
232 
233  private:
234  //**Member variables****************************************************************************
237  //**********************************************************************************************
238 
239  //**Assignment to dense vectors*****************************************************************
251  template< typename VT > // Type of the target dense vector
252  friend inline void assign( DenseVector<VT,false>& lhs, const SVecDVecCrossExpr& rhs )
253  {
255 
256  BLAZE_INTERNAL_ASSERT( (~lhs).size() == 3UL, "Invalid vector size" );
257  BLAZE_INTERNAL_ASSERT( (~rhs).size() == 3UL, "Invalid vector size" );
258 
259  LT x( rhs.lhs_ ); // Evaluation of the left-hand side sparse vector operand
260  RT y( rhs.rhs_ ); // Evaluation of the right-hand side dense vector operand
261 
262  (~lhs)[0] = x[1UL]*y[2UL] - x[2UL]*y[1UL];
263  (~lhs)[1] = x[2UL]*y[0UL] - x[0UL]*y[2UL];
264  (~lhs)[2] = x[0UL]*y[1UL] - x[1UL]*y[0UL];
265  }
267  //**********************************************************************************************
268 
269  //**Assignment to sparse vectors****************************************************************
281  template< typename VT > // Type of the target sparse vector
282  friend inline void assign( SparseVector<VT,false>& lhs, const SVecDVecCrossExpr& rhs )
283  {
285 
289 
290  BLAZE_INTERNAL_ASSERT( (~lhs).size() == 3UL, "Invalid vector size" );
291  BLAZE_INTERNAL_ASSERT( (~rhs).size() == 3UL, "Invalid vector size" );
292 
293  const ResultType tmp( rhs );
294  assign( ~lhs, tmp );
295  }
297  //**********************************************************************************************
298 
299  //**Addition assignment to dense vectors********************************************************
311  template< typename VT > // Type of the target dense vector
312  friend inline void addAssign( DenseVector<VT,false>& lhs, const SVecDVecCrossExpr& rhs )
313  {
315 
316  BLAZE_INTERNAL_ASSERT( (~lhs).size() == 3UL, "Invalid vector size" );
317  BLAZE_INTERNAL_ASSERT( (~rhs).size() == 3UL, "Invalid vector size" );
318 
319  LT x( rhs.lhs_ ); // Evaluation of the left-hand side sparse vector operand
320  RT y( rhs.rhs_ ); // Evaluation of the right-hand side dense vector operand
321 
322  (~lhs)[0] += x[1UL]*y[2UL] - x[2UL]*y[1UL];
323  (~lhs)[1] += x[2UL]*y[0UL] - x[0UL]*y[2UL];
324  (~lhs)[2] += x[0UL]*y[1UL] - x[1UL]*y[0UL];
325  }
327  //**********************************************************************************************
328 
329  //**Addition assignment to sparse vectors*******************************************************
330  // No special implementation for the addition assignment to sparse vectors.
331  //**********************************************************************************************
332 
333  //**Subtraction assignment to dense vectors*****************************************************
345  template< typename VT > // Type of the target dense vector
346  friend inline void subAssign( DenseVector<VT,false>& lhs, const SVecDVecCrossExpr& rhs )
347  {
349 
350  BLAZE_INTERNAL_ASSERT( (~lhs).size() == 3UL, "Invalid vector size" );
351  BLAZE_INTERNAL_ASSERT( (~rhs).size() == 3UL, "Invalid vector size" );
352 
353  LT x( rhs.lhs_ ); // Evaluation of the left-hand side sparse vector operand
354  RT y( rhs.rhs_ ); // Evaluation of the right-hand side dense vector operand
355 
356  (~lhs)[0] -= x[1UL]*y[2UL] - x[2UL]*y[1UL];
357  (~lhs)[1] -= x[2UL]*y[0UL] - x[0UL]*y[2UL];
358  (~lhs)[2] -= x[0UL]*y[1UL] - x[1UL]*y[0UL];
359  }
361  //**********************************************************************************************
362 
363  //**Subtraction assignment to sparse vectors****************************************************
364  // No special implementation for the subtraction assignment to sparse vectors.
365  //**********************************************************************************************
366 
367  //**Multiplication assignment to dense vectors**************************************************
379  template< typename VT > // Type of the target dense vector
380  friend inline void multAssign( DenseVector<VT,false>& lhs, const SVecDVecCrossExpr& rhs )
381  {
383 
384  BLAZE_INTERNAL_ASSERT( (~lhs).size() == 3UL, "Invalid vector size" );
385  BLAZE_INTERNAL_ASSERT( (~rhs).size() == 3UL, "Invalid vector size" );
386 
387  LT x( rhs.lhs_ ); // Evaluation of the left-hand side sparse vector operand
388  RT y( rhs.rhs_ ); // Evaluation of the right-hand side dense vector operand
389 
390  (~lhs)[0] *= x[1UL]*y[2UL] - x[2UL]*y[1UL];
391  (~lhs)[1] *= x[2UL]*y[0UL] - x[0UL]*y[2UL];
392  (~lhs)[2] *= x[0UL]*y[1UL] - x[1UL]*y[0UL];
393  }
395  //**********************************************************************************************
396 
397  //**Multiplication assignment to sparse vectors*************************************************
398  // No special implementation for the multiplication assignment to sparse vectors.
399  //**********************************************************************************************
400 
401  //**Compile time checks*************************************************************************
408  //**********************************************************************************************
409 };
410 //*************************************************************************************************
411 
412 
413 
414 
415 //=================================================================================================
416 //
417 // GLOBAL BINARY ARITHMETIC OPERATORS
418 //
419 //=================================================================================================
420 
421 //*************************************************************************************************
448 template< typename T1 // Type of the left-hand side sparse vector
449  , typename T2 > // Type of the right-hand side dense vector
450 inline const SVecDVecCrossExpr<T1,T2>
452 {
454 
455  if( (~lhs).size() != 3UL || (~rhs).size() != 3UL )
456  throw std::invalid_argument( "Invalid vector size for cross product" );
457 
458  return SVecDVecCrossExpr<T1,T2>( ~lhs, ~rhs );
459 }
460 //*************************************************************************************************
461 
462 } // namespace blaze
463 
464 #endif
Compile time check whether the given type is a temporary vector or matrix type.This type trait class ...
Definition: IsTemporary.h:87
SVecDVecCrossExpr(const VT1 &lhs, const VT2 &rhs)
Constructor for the SVecDVecCrossExpr class.
Definition: SVecDVecCrossExpr.h:152
#define BLAZE_CONSTRAINT_MUST_BE_COLUMN_VECTOR_TYPE(T)
Constraint on the data type.In case the given data type T is not a column dense or sparse vector type...
Definition: TransposeFlag.h:159
Efficient implementation of a compressed matrix.The CompressedMatrix class template is the represent...
Definition: CompressedMatrix.h:196
RightOperand rhs_
Right-hand side dense vector of the cross product expression.
Definition: SVecDVecCrossExpr.h:236
VT2::ReturnType RN2
Return type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:91
Expression object for sparse vector-dense vector cross products.The SVecDVecCrossExpr class represent...
Definition: Forward.h:107
const This & CompositeType
Data type for composite expression templates.
Definition: CompressedMatrix.h:2375
Type ElementType
Type of the sparse matrix elements.
Definition: CompressedMatrix.h:248
Header file for the DenseVector base class.
VT1::ReturnType RN1
Return type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:90
Header file for the Computation base class.
SubExprTrait< typename MultExprTrait< RN1, RN2 >::Type, typename MultExprTrait< RN1, RN2 >::Type >::Type ExprReturnType
Expression return type for the subscript operator.
Definition: SVecDVecCrossExpr.h:109
VT1::ResultType RT1
Result type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:88
Constraint on the data type.
Base template for the CrossTrait class.
Definition: CrossTrait.h:110
Efficient implementation of a fixed-sized vector.The StaticVector class template is the representatio...
Definition: Forward.h:51
VT2::CompositeType CT2
Composite type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:93
Header file for the MultExprTrait class template.
VT2::ResultType RT2
Result type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:89
Compile time type selection.The SelectType class template selects one of the two given types T1 and T...
Definition: SelectType.h:59
const StaticVector< ET1, 3UL, false > LT
Composite type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:132
Header file for the IsTemporary type trait class.
VT1::CompositeType CT1
Composite type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:92
bool isAliased(const T *alias) const
Returns whether the expression is aliased with the given address alias.
Definition: SVecDVecCrossExpr.h:228
LeftOperand lhs_
Left-hand side sparse vector of the cross product expression.
Definition: SVecDVecCrossExpr.h:235
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
const DVecDVecCrossExpr< T1, T2 > operator%(const DenseVector< T1, false > &lhs, const DenseVector< T2, false > &rhs)
Operator for the cross product of two dense vectors ( ).
Definition: DVecDVecCrossExpr.h:448
Base class for N-dimensional dense vectors.The DenseVector class is a base class for all arbitrarily ...
Definition: DenseVector.h:70
#define BLAZE_CONSTRAINT_MUST_BE_SPARSE_VECTOR_TYPE(T)
Constraint on the data type.In case the given data type T is not a sparse, N-dimensional vector type...
Definition: SparseVector.h:79
SelectType< IsComputation< VT2 >::value, const StaticVector< ET2, 3UL, false >, CT2 >::Type RT
Composite type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:135
Constraint on the data type.
#define BLAZE_CONSTRAINT_MUST_BE_REFERENCE_TYPE(T)
Constraint on the data type.In case the given data type T is not a reference type, a compilation error is created.
Definition: Reference.h:78
Constraint on the data type.
Evaluation of the return type of a subtraction expression.Via this type trait it is possible to evalu...
Definition: SubExprTrait.h:103
Type ElementType
Type of the sparse matrix elements.
Definition: CompressedMatrix.h:2373
void multAssign(Matrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs)
Default implementation of the multiplication assignment of a matrix to a matrix.
Definition: Matrix.h:269
Header file for the SelectType class template.
Header file for all forward declarations for expression class templates.
Constraint on the data type.
bool canAlias(const T *alias) const
Returns whether the expression can alias with the given address alias.
Definition: SVecDVecCrossExpr.h:216
const ResultType CompositeType
Data type for composite expression templates.
Definition: SVecDVecCrossExpr.h:123
Header file for the CrossExpr base class.
const SelectType< returnExpr, ExprReturnType, ElementType >::Type ReturnType
Return type for expression template evaluations.
Definition: SVecDVecCrossExpr.h:120
ResultType::ElementType ElementType
Resulting element type.
Definition: SVecDVecCrossExpr.h:117
Header file for all forward declarations for dense vectors and matrices.
SelectType< IsExpression< VT1 >::value, const VT1, const VT1 & >::Type LeftOperand
Composite type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:126
const Type & ReturnType
Return type for expression template evaluations.
Definition: CompressedMatrix.h:2374
Header file for run time assertion macros.
Header file for the cross product trait.
ResultType::TransposeType TransposeType
Transpose type for expression template evaluations.
Definition: SVecDVecCrossExpr.h:116
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
VT1::ElementType ET1
Element type of the left-hand side sparse vector expression.
Definition: SVecDVecCrossExpr.h:94
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
SelectType< IsExpression< VT2 >::value, const VT2, const VT2 & >::Type RightOperand
Composite type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:129
ReturnType operator[](size_t index) const
Subscript operator for the direct access to the vector elements.
Definition: SVecDVecCrossExpr.h:167
#define BLAZE_CONSTRAINT_MUST_BE_DENSE_VECTOR_TYPE(T)
Constraint on the data type.In case the given data type T is not a dense, N-dimensional vector type...
Definition: DenseVector.h:79
CrossTrait< RT1, RT2 >::Type ResultType
Result type for expression template evaluations.
Definition: SVecDVecCrossExpr.h:115
Header file for the IsComputation type trait class.
size_t size() const
Returns the current size/dimension of the vector.
Definition: SVecDVecCrossExpr.h:184
Base class for sparse vectors.The SparseVector class is a base class for all arbitrarily sized (N-dim...
Definition: Forward.h:105
#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:2370
Header file for basic type definitions.
Header file for the SubExprTrait class template.
SVecDVecCrossExpr< VT1, VT2 > This
Type of this SVecDVecCrossExpr instance.
Definition: SVecDVecCrossExpr.h:114
RightOperand rightOperand() const
Returns the right-hand side dense vector operand.
Definition: SVecDVecCrossExpr.h:204
Evaluation of the resulting expression type of a multiplication.Via this type trait it is possible to...
Definition: MultExprTrait.h:137
#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
LeftOperand leftOperand() const
Returns the left-hand side sparse vector operand.
Definition: SVecDVecCrossExpr.h:194
Header file for the IsExpression type trait class.
VT2::ElementType ET2
Element type of the right-hand side dense vector expression.
Definition: SVecDVecCrossExpr.h:95
Header file for the FunctionTrace class.