stq abcdef0123456789,1133557722446688,   0 => abcdef0123456789,1133557722446688)

lq (0xaaccee0011335577, 0xabcdef0123456789) =>  (reg_pair = 0xaaccee0011335577, 0xabcdef0123456789)

lbarx (0xaaccee0011335577, 0xabcdef0123456789) =>  (reg_pair = 0x00000000000000aa, 0x0000000000000000)

lharx (0xaaccee0011335577, 0xabcdef0123456789) =>  (reg_pair = 0x000000000000aacc, 0x0000000000000000)

lqarx (0xaaccee0011335577, 0xabcdef0123456789) =>  (reg_pair = 0xaaccee0011335577, 0xabcdef0123456789)

stbcx. abefcd0145236789,1155337744226688 => 8900000000000000,0000000000000001; CR=20000000

sthcx. abefcd0145236789,1155337744226688 => 6789000000000000,0000000000000001; CR=20000000

stqcx. abefcd0145236789,1155337744226688 => abefcd0145236789,1155337744226688; CR=20000000

All done. Tested 8 different instructions