1 #ifndef VIENNACL_CIRCULANT_MATRIX_HPP 
    2 #define VIENNACL_CIRCULANT_MATRIX_HPP 
   40 template<
class NumericT, 
unsigned int AlignmentV>
 
   61     assert(rows == cols && 
bool(
"Circulant matrix must be square!"));
 
   73     elements_.
resize(sz, preserve);
 
  115     long index = 
static_cast<long>(row_index) - static_cast<long>(col_index);
 
  117     assert(row_index < 
size1() && col_index < 
size2() && 
bool(
"Invalid access"));
 
  120       index += 
static_cast<long>(
size1());
 
  121     return elements_[
static_cast<vcl_size_t>(index)];
 
  149 template<
typename NumericT, 
unsigned int AlignmentV>
 
  152   assert( (gpu_mat.
size1() == 0 || cpu_vec.size() == gpu_mat.
size1()) && 
bool(
"Size mismatch"));
 
  162 template<
typename NumericT, 
unsigned int AlignmentV>
 
  165   assert(cpu_vec.size() == gpu_mat.
size1() && bool(
"Size mismatch"));
 
  175 template<
typename NumericT, 
unsigned int AlignmentV, 
typename MatrixT>
 
  181   std::vector<NumericT> tmp(size);
 
  188       long index = 
static_cast<long>(i) - static_cast<long>(j);
 
  190         index += 
static_cast<long>(
size);
 
  191       com_dst(i, j) = tmp[
static_cast<vcl_size_t>(index)];
 
  202 template<
typename NumericT, 
unsigned int AlignmentV, 
typename MatrixT>
 
  210   std::vector<NumericT> tmp(size);
 
  240 template<
class NumericT, 
unsigned int AlignmentV>
 
  241 std::ostream & operator<<(std::ostream& s, circulant_matrix<NumericT, AlignmentV>& gpu_matrix)
 
  244   std::vector<NumericT> tmp(size);
 
  245   copy(gpu_matrix, tmp);
 
  246   s << 
"[" << size << 
"," << size << 
"](";
 
  253       long index = 
static_cast<long>(i) - static_cast<long>(j);
 
  254       if (index < 0) index = 
static_cast<long>(
size) + index;
 
  257       if (j < (size - 1)) s << 
",";
 
  276   template<
typename T, 
unsigned int A>
 
  277   struct op_executor<vector_base<T>, 
op_assign, vector_expression<const circulant_matrix<T, A>, const vector_base<T>, op_prod> >
 
  279     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, 
const vector_base<T>, op_prod> 
const & rhs)
 
  293   template<
typename T, 
unsigned int A>
 
  294   struct op_executor<vector_base<T>, op_inplace_add, vector_expression<const circulant_matrix<T, A>, const vector_base<T>, op_prod> >
 
  296     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, 
const vector_base<T>, op_prod> 
const & rhs)
 
  304   template<
typename T, 
unsigned int A>
 
  305   struct op_executor<vector_base<T>, op_inplace_sub, vector_expression<const circulant_matrix<T, A>, const vector_base<T>, op_prod> >
 
  307     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, 
const vector_base<T>, op_prod> 
const & rhs)
 
  317   template<
typename T, 
unsigned int A, 
typename LHS, 
typename RHS, 
typename OP>
 
  318   struct op_executor<vector_base<T>, 
op_assign, vector_expression<const circulant_matrix<T, A>, const vector_expression<const LHS, const RHS, OP>, op_prod> >
 
  320     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, 
const vector_expression<const LHS, const RHS, OP>, op_prod> 
const & rhs)
 
  328   template<
typename T, 
unsigned int A, 
typename LHS, 
typename RHS, 
typename OP>
 
  329   struct op_executor<vector_base<T>, op_inplace_add, vector_expression<const circulant_matrix<T, A>, vector_expression<const LHS, const RHS, OP>, op_prod> >
 
  331     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, vector_expression<const LHS, const RHS, OP>, op_prod> 
const & rhs)
 
  341   template<
typename T, 
unsigned int A, 
typename LHS, 
typename RHS, 
typename OP>
 
  342   struct op_executor<vector_base<T>, op_inplace_sub, vector_expression<const circulant_matrix<T, A>, const vector_expression<const LHS, const RHS, OP>, op_prod> >
 
  344     static void apply(vector_base<T> & lhs, vector_expression<
const circulant_matrix<T, A>, 
const vector_expression<const LHS, const RHS, OP>, op_prod> 
const & rhs)
 
  359 #endif // VIENNACL_CIRCULANT_MATRIX_HPP 
viennacl::vector< NumericT, AlignmentV > const & elements() const 
This class represents a single scalar value on the GPU and behaves mostly like a built-in scalar type...
viennacl::vector< NumericT, AlignmentV > & elements()
Returns an internal viennacl::vector, which represents a circulant matrix elements. 
Implementations of operations using circulant_matrix. Experimental. 
viennacl::backend::mem_handle handle_type
vcl_size_t size1(MatrixType const &mat)
Generic routine for obtaining the number of rows of a matrix (ViennaCL, uBLAS, etc.) 
scalar< typename viennacl::tools::CHECK_SCALAR_TEMPLATE_ARGUMENT< NumericT >::ResultType > value_type
This file provides the forward declarations for the main types used within ViennaCL. 
void resize(vcl_size_t sz, bool preserve=true)
Resizes the matrix. Existing entries can be preserved. 
result_of::size_type< MatrixType >::type size2(MatrixType const &mat)
Generic routine for obtaining the number of columns of a matrix (ViennaCL, uBLAS, etc...
vcl_size_t size(VectorType const &vec)
Generic routine for obtaining the size of a vector (ViennaCL, uBLAS, etc.) 
vcl_size_t internal_size() const 
Returns the internal size of matrix representtion. Usually required for launching OpenCL kernels only...
vcl_size_t size1() const 
Returns the number of rows of the matrix. 
void resize(size_type new_size, bool preserve=true)
Resizes the allocated memory for the vector. Pads the memory to be a multiple of 'AlignmentV'. 
entry_proxy< NumericT > operator()(vcl_size_t row_index, vcl_size_t col_index)
Read-write access to a single element of the matrix. 
circulant_matrix()
The default constructor. Does not allocate any memory. 
Implementations of the OpenCL backend, where all contexts are stored in. 
handle_type const & handle() const 
Returns the OpenCL handle. 
The vector type with operator-overloads and proxy classes is defined here. Linear algebra operations ...
void copy(std::vector< NumericT > &cpu_vec, circulant_matrix< NumericT, AlignmentV > &gpu_mat)
Copies a circulant matrix from the std::vector to the OpenCL device (either GPU or multi-core CPU) ...
size_type size() const 
Returns the length of the vector (cf. std::vector) 
All routines related to the Fast Fourier Transform. Experimental. 
Main abstraction class for multiple memory domains. Represents a buffer in either main RAM...
A Circulant matrix class. 
circulant_matrix(vcl_size_t rows, vcl_size_t cols)
Creates the matrix with the given size. 
vcl_size_t size2() const 
Returns the number of columns of the matrix. 
void prod_impl(const matrix_base< NumericT > &mat, const vector_base< NumericT > &vec, vector_base< NumericT > &result)
Carries out matrix-vector multiplication. 
size_type internal_size() const 
Returns the internal length of the vector, which is given by size() plus the extra memory due to padd...
viennacl::backend::mem_handle & handle(T &obj)
Returns the generic memory handle of an object. Non-const version. 
A proxy class for a single element of a vector or matrix. This proxy should not be noticed by end-use...
const handle_type & handle() const 
Returns the memory handle. 
circulant_matrix< NumericT, AlignmentV > & operator+=(circulant_matrix< NumericT, AlignmentV > &that)
+= operation for circulant matrices