/byte_swap_2.S/1.1/Sun Aug 10 05:47:35 2014//Tnetbsd-10
/byte_swap_4.S/1.1/Sun Aug 10 05:47:35 2014//Tnetbsd-10
/byte_swap_8.S/1.2/Sat Oct 12 09:22:36 2019//Tnetbsd-10
D