mkl_graph_matrix_get_csc
mkl_graph_matrix_get_csc
Exports a CSC representation of a graph matrix.
Syntax
mkl_graph_status_t
mkl_graph_matrix_get_csc (mkl_graph_matrix_t
A
,
int64_t
*nrows
,
int64_t
*ncols
,
void
**cols_start
,
mkl_graph_type_t
*cols_start_type
,
void
**row_indx
,
mkl_graph_type_t
*row_indx_type
,
void
**values
,
mkl_graph_type_t
*values_type
);
Include Files
- mkl_graph.h
Description
The
mkl_graph_matrix_get_csc
routine exports the CSC representation of a graph matrix in the 3-array variation. All output arguments are optional and will not be used if NULL pointers are passed. For each array in the 3-array CSC format (cols_start
, row_indx
or values
) the type of the elements can be obtained from a corresponding parameter of type mkl_graph_type_t
.Refer to Sparse Matrix Storage Formats for further details on the CSC format.
The routine .
mkl_graph_matrix_get_csc
does not change the ownership of the data. In particular, you should not directly deallocate the returned pointers. A call to mkl_graph_matrix_destroy
handles freeing any data allocated by Intel® oneAPI Math Kernel Library
If only information about the number of rows or the number of columns is needed,
mkl_graph_matrix_get_property
can be used instead of mkl_graph_matrix_get_csc
.Input Parameters
- A
- A graph matrix from which data are retrieved.
Output Parameters
- nrows
- Number of rows in the matrix. Ignored if NULL is passed.
- ncols
- Number of columns in the matrix. Ignored if NULL is passed.
- cols_start
- A pointer to an array of length at least (n+1), wherenis the number of columns in the matrix. The value ofcols_start[j]is the index of the first non-zero entry in columnjin the arraysrow_indxandvalues. The valuecols_start[n]-cols_start[0]will be the total number of non-zero entries in the matrix. Type of the array elements can be deduced fromcols_start_type.Ignored if NULL.Refer topointerBarray description in CSC Format for more details.
- cols_start_type
- Type of the elements of thecols_startarray. Refer to Graph API Glossary for a list of possible options. Ignored if NULL is passed.
- row_indx
- A pointer to an array which contains zero-based column indices for the non-zero entries of the matrixA. Type of the array elements can be deduced fromrow_indx_type. Ignored if NULL.Refer to therowsarray description in CSC Format for more details.
- row_indx_type
- Type of the elements of therow_indxarray. Refer to Graph API Glossary for a list of possible options. Ignored if NULL is passed.
- values
- A pointer to an array which contains values for the nonzero entries of the matrix A. The type of the array elements can be deduced fromvalues_type.Ignored if NULL.Refer to thevaluesarray description in CSC Format for more details.
- values_type
- Type of the elements of thevaluesarray. Refer to Graph API Glossary for a list of possible options. Ignored if NULL is passed.
Return Values
The function returns a value indicating whether the operation was successful or not and why. Refer to Graph API Glossary for a list of possible options.
Optimization Notice
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Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.
Notice revision #20110804
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This notice covers the following instruction sets: SSE2, SSE4.2, AVX2, AVX-512.