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/*
-- MAGMA (version 2.9.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2025
@precisions normal z -> s d c
@author Hartwig Anzt
*/
// in this file, many routines are taken from
// the IO functions provided by MatrixMarket
#include "magmasparse_internal.h"
/**
Purpose
-------
Passes a CSR matrix to MAGMA (located on DEV).
Arguments
---------
@param[in]
m magma_int_t
number of rows
@param[in]
n magma_int_t
number of columns
@param[in]
row magmaIndex_ptr
row pointer
@param[in]
col magmaIndex_ptr
column indices
@param[in]
val magmaDoubleComplex_ptr
array containing matrix entries
@param[out]
A magma_z_matrix*
matrix in magma sparse matrix format
@param[in]
queue magma_queue_t
Queue to execute in.
@ingroup magmasparse_zaux
********************************************************************/
extern "C"
magma_int_t
magma_zcsrset_gpu(
magma_int_t m,
magma_int_t n,
magmaIndex_ptr row,
magmaIndex_ptr col,
magmaDoubleComplex_ptr val,
magma_z_matrix *A,
magma_queue_t queue )
{
// make sure the target structure is empty
magma_zmfree( A, queue );
A->num_rows = m;
A->num_cols = n;
magma_index_t nnz;
magma_index_getvector( 1, row+m, 1, &nnz, 1, queue );
A->nnz = (magma_int_t) nnz;
A->storage_type = Magma_CSR;
A->memory_location = Magma_DEV;
A->dval = val;
A->dcol = col;
A->drow = row;
A->ownership = MagmaFalse;
return MAGMA_SUCCESS;
}
/**
Purpose
-------
Passes a MAGMA matrix to CSR structure (located on DEV).
Arguments
---------
@param[in]
A magma_z_matrix
magma sparse matrix in CSR format
@param[out]
m magma_int_t
number of rows
@param[out]
n magma_int_t
number of columns
@param[out]
row magmaIndex_ptr
row pointer
@param[out]
col magmaIndex_ptr
column indices
@param[out]
val magmaDoubleComplex_ptr
array containing matrix entries
@param[in]
queue magma_queue_t
Queue to execute in.
@ingroup magmasparse_zaux
********************************************************************/
extern "C"
magma_int_t
magma_zcsrget_gpu(
magma_z_matrix A,
magma_int_t *m,
magma_int_t *n,
magmaIndex_ptr *row,
magmaIndex_ptr *col,
magmaDoubleComplex_ptr *val,
magma_queue_t queue )
{
magma_int_t info = 0;
magma_z_matrix A_DEV={Magma_CSR}, A_CSR={Magma_CSR};
if ( A.memory_location == Magma_DEV && A.storage_type == Magma_CSR ) {
*m = A.num_rows;
*n = A.num_cols;
*val = A.dval;
*col = A.dcol;
*row = A.drow;
A.ownership = MagmaFalse;
} else {
CHECK( magma_zmconvert( A, &A_CSR, A.storage_type, Magma_CSR, queue ));
CHECK( magma_zmtransfer( A_CSR, &A_DEV, A.memory_location, Magma_DEV, queue ));
magma_zcsrget_gpu( A_DEV, m, n, row, col, val, queue );
}
cleanup:
magma_zmfree( &A_CSR, queue );
magma_zmfree( &A_DEV, queue );
return info;
}
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