/*! \file */
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#pragma once
#ifndef CSR2COO_DEVICE_H
#define CSR2COO_DEVICE_H

#include <hip/hip_runtime.h>

// CSR to COO matrix conversion kernel
template <unsigned int BLOCKSIZE, unsigned int WF_SIZE, typename I, typename J>
__launch_bounds__(BLOCKSIZE) ROCSPARSE_KERNEL
    void csr2coo_kernel(J m, const I* csr_row_ptr, J* coo_row_ind, rocsparse_index_base idx_base)
{
    J tid = hipThreadIdx_x;
    J gid = hipBlockIdx_x * BLOCKSIZE + tid;
    J lid = tid & (WF_SIZE - 1);
    J nwf = hipGridDim_x * BLOCKSIZE / WF_SIZE;

    for(J row = gid / WF_SIZE; row < m; row += nwf)
    {
        for(I aj = csr_row_ptr[row] + lid; aj < csr_row_ptr[row + 1]; aj += WF_SIZE)
        {
            coo_row_ind[aj - idx_base] = row + idx_base;
        }
    }
}

#endif // CSR2COO_DEVICE_H