get_previous_comments_link

 */
function next_comments_link( $label = '', $max_page = 0 ) {
	echo get_next_comments_link( $label, $max_page );
}

/**
 * Retrieves the link to the previous comments page.
 *
 * @since 2.7.1
 *
 * @param string $label Optional. Label for comments link text. Default empty.
 * @return string|void HTML-formatted link for the previous page of comments.
 */
function get_previous_comments_link( $label = '' ) {
	if ( ! is_singular() ) {
		return;
	}

	$page = get_query_var( 'cpage' );

	if ( intval( $page ) <= 1 ) {
		return;
	}

	$prevpage = intval( $page ) - 1;