tests/stxdw.data

-- asm
mov %r2, 0x88776655
lsh %r2, 32
or %r2, 0x44332211
stxdw [%r1+2], %r2
ldxdw %r0, [%r1+2]
exit
-- mem
aa bb ff ff ff ff ff ff ff ff cc dd
-- result
0x8877665544332211