TheRock/rocm-libraries/projects/rocsparse/library/include/internal/level1/rocsparse_sctr.h

/*! \file */
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#ifndef ROCSPARSE_SCTR_H
#define ROCSPARSE_SCTR_H

#include "../../rocsparse-types.h"
#include "rocsparse/rocsparse-export.h"

#ifdef __cplusplus
extern "C" {
#endif

/*! \ingroup level1_module
*  \brief Scatter elements from a dense vector across a sparse vector.
*
*  \details
*  \p rocsparse_sctr scatters the elements that are listed in \p x_ind from the sparse
*  vector \f$x\f$ into the dense vector \f$y\f$. Indices of \f$y\f$ that are not listed
*  in \p x_ind remain unchanged.
*
*  \code{.c}
*      for(i = 0; i < nnz; ++i)
*      {
*          y[x_ind[i]] = x_val[i];
*      }
*  \endcode
*
*  \note
*  This function is non-blocking and executed asynchronously with respect to the host.
*  It can return before the actual computation has finished.
*
*  \note
*  This routine supports execution in a hipGraph context.
*
*  @param[in]
*  handle      handle to the rocSPARSE library context queue.
*  @param[in]
*  nnz         number of non-zero entries of \f$x\f$.
*  @param[in]
*  x_val       array of \p nnz elements containing the non-zero values of \f$x\f$.
*  @param[in]
*  x_ind       array of \p nnz elements containing the indices of the non-zero
*              values of x.
*  @param[inout]
*  y           array of values in dense format.
*  @param[in]
*  idx_base    \ref rocsparse_index_base_zero or \ref rocsparse_index_base_one.
*
*  \retval     rocsparse_status_success the operation completed successfully.
*  \retval     rocsparse_status_invalid_handle the library context was not initialized.
*  \retval     rocsparse_status_invalid_value \p idx_base is invalid.
*  \retval     rocsparse_status_invalid_size \p nnz is invalid.
*  \retval     rocsparse_status_invalid_pointer \p x_val, \p x_ind, or \p y pointer is
*              invalid.
*
*  \par Example
*  \snippet example_rocsparse_sctr.cpp doc example
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_ssctr(rocsparse_handle     handle,
                                 rocsparse_int        nnz,
                                 const float*         x_val,
                                 const rocsparse_int* x_ind,
                                 float*               y,
                                 rocsparse_index_base idx_base);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_dsctr(rocsparse_handle     handle,
                                 rocsparse_int        nnz,
                                 const double*        x_val,
                                 const rocsparse_int* x_ind,
                                 double*              y,
                                 rocsparse_index_base idx_base);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_csctr(rocsparse_handle               handle,
                                 rocsparse_int                  nnz,
                                 const rocsparse_float_complex* x_val,
                                 const rocsparse_int*           x_ind,
                                 rocsparse_float_complex*       y,
                                 rocsparse_index_base           idx_base);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_zsctr(rocsparse_handle                handle,
                                 rocsparse_int                   nnz,
                                 const rocsparse_double_complex* x_val,
                                 const rocsparse_int*            x_ind,
                                 rocsparse_double_complex*       y,
                                 rocsparse_index_base            idx_base);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_isctr(rocsparse_handle     handle,
                                 rocsparse_int        nnz,
                                 const rocsparse_int* x_val,
                                 const rocsparse_int* x_ind,
                                 rocsparse_int*       y,
                                 rocsparse_index_base idx_base);

/**@}*/
#ifdef __cplusplus
}
#endif

#endif // ROCSPARSE_SCTR_H