struct yac_interpolation_type * yac_interpolation_sum_mvp_at_tgt_new(size_t collection_size, Xt_redist *src_redists, size_t *tgt_pos, size_t tgt_count, size_t *num_src_per_tgt, double *weights, size_t *src_field_idx, size_t *src_idx, size_t num_src_fields, int with_frac_mask)