code: public static int cusparseSaxpyi(
          cusparseHandle handle, 
          int nnz, 
          Pointer alpha, 
          Pointer xVal, 
          Pointer xInd, 
          Pointer y, 
          int idxBase)
      {
          return checkResult(cusparseSaxpyiNative(handle, nnz, alpha, xVal, xInd, y, idxBase));
      }
docs: Description: Addition of a scalar multiple of a sparse vector x
  and a dense vector y.