Hex hybrid constants 0xHHHH work badly in rounding functions

SET sql_mode='STRICT_ALL_TABLES,STRICT_TRANS_TABLES';

CREATE OR REPLACE TABLE t1 AS SELECT

  0xFFFFFFFFFFFFFFFF+0 AS c1,

  FLOOR(0xFFFFFFFFFFFFFFFF) AS c2,

  CEILING(0xFFFFFFFFFFFFFFFF) AS c3,

  ROUND(0xFFFFFFFFFFFFFFFF) AS c4,

  TRUNCATE(0xFFFFFFFFFFFFFFFF,0) AS c5;

ERROR 1264 (22003): Out of range value for column 'c4' at row

SET sql_mode='';

CREATE OR REPLACE TABLE t1 AS SELECT

  0xFFFFFFFFFFFFFFFF+0 AS c1,

  FLOOR(0xFFFFFFFFFFFFFFFF) AS c2,

  CEILING(0xFFFFFFFFFFFFFFFF) AS c3,

  ROUND(0xFFFFFFFFFFFFFFFF) AS c4,

  TRUNCATE(0xFFFFFFFFFFFFFFFF,0) AS c5;

Query OK, 1 row affected, 2 warnings (0.022 sec)

Records: 1  Duplicates: 0  Warnings: 2

SELECT * FROM t1\G

*************************** 1. row ***************************

c1: 18446744073709551615

c2: 9223372036854775808

c3: 9223372036854775808

c4: 100000000000000000

c5: 100000000000000000

1 row in set (0.001 sec)

DESCRIBE t1;

+-------+-----------------------+------+-----+---------+-------+

| Field | Type                  | Null | Key | Default | Extra |

+-------+-----------------------+------+-----+---------+-------+

| c1    | bigint(21) unsigned   | NO   |     | NULL    |       |

| c2    | bigint(10) unsigned   | NO   |     | NULL    |       |

| c3    | bigint(10) unsigned   | NO   |     | NULL    |       |

| c4    | double(17,0) unsigned | NO   |     | NULL    |       |

| c5    | double(17,0) unsigned | NO   |     | NULL    |       |

+-------+-----------------------+------+-----+---------+-------+