mkl_sparse_?_export

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 12/16/2022

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mkl_sparse_?_export_csr

Exports CSR matrix from internal representation.

Syntax

stat = mkl_sparse_s_export_csr (source, indexing, rows, cols, rows_start, rows_end, col_indx, values)

stat = mkl_sparse_d_export_csr (source, indexing, rows, cols, rows_start, rows_end, col_indx, values)

stat = mkl_sparse_c_export_csr (source, indexing, rows, cols, rows_start, rows_end, col_indx, values)

stat = mkl_sparse_z_export_csr (source, indexing, rows, cols, rows_start, rows_end, col_indx, values)

Include Files

mkl_spblas.f90

Description

If the matrix specified by the source handle is in CSR format, the mkl_sparse_?_export_csr routine exports an m-by-k matrix A in CSR format matrix from the internal representation. The routine returns pointers to the internal representation and does not allocate additional memory.

If the matrix is not already in CSR format, the routine returns SPARSE_STATUS_INVALID_VALUE.

Input Parameters

source

SPARSE_MATRIX_T.

Handle containing internal data.

Output Parameters

indexing

sparse_index_base_t.

Indicates how input arrays are indexed.

`SPARSE_INDEX_BASE_ZERO`	Zero-based (C-style) indexing: indices start at 0.
`SPARSE_INDEX_BASE_ONE`	One-based (Fortran-style) indexing: indices start at 1.

rows

C_INT.

Number of rows of the matrix source.

cols

C_INT.

Number of columns of the matrix source.

rows_start

C_INT.

Pointer to array of length m. This array contains row indices, such that rows_start(i) - ind is the first index of row i in the arrays values and col_indx. ind takes 0 for zero-based indexing and 1 for one-based indexing.

Refer to pointerB array description in CSR Format for more details.

rows_end

C_INT.

Pointer to array of length m. This array contains row indices, such that rows_end(i) - ind - 1 is the last index of row i in the arrays values and col_indx. ind takes 0 for zero-based indexing and 1 for one-based indexing.

Refer to pointerE array description in CSR Format for more details.

col_indx

C_INT.

For one-based indexing, pointer to array containing the column indices plus one for each non-zero element of the matrix source. For zero-based indexing, pointer to array containing the column indices for each non-zero element of the matrix source. Its length is rows_end(rows - 1) - ind. ind takes 0 for zero-based indexing and 1 for one-based indexing.

values

C_FLOAT for mkl_sparse_s_export_csr

C_DOUBLE for mkl_sparse_d_export_csr

C_FLOAT_COMPLEX for mkl_sparse_c_export_csr

C_DOUBLE_COMPLEX for mkl_sparse_z_export_csr

Pointer to array containing non-zero elements of the matrix A. Its length is equal to length of the col_indx array.

Refer to values array description in CSR Format for more details.

Output Parameters

stat

INTEGER

Value indicating whether the operation was successful or not, and why:

`SPARSE_STATUS_SUCCESS`	The operation was successful.
`SPARSE_STATUS_NOT_INITIALIZED`	The routine encountered an empty handle or matrix array.
`SPARSE_STATUS_ALLOC_FAILED`	Internal memory allocation failed.
`SPARSE_STATUS_INVALID_VALUE`	The input parameters contain an invalid value.
`SPARSE_STATUS_EXECUTION_FAILED`	Execution failed.
`SPARSE_STATUS_INTERNAL_ERROR`	An error in algorithm implementation occurred.
`SPARSE_STATUS_NOT_SUPPORTED`	The requested operation is not supported.

Parent topic: Matrix Manipulation Routines

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

mkl_sparse_?_export_csr