Thanks. I did some search and find no answer. How do I define %0 as a register input and assign the value of "addr" to it? Tim On Wed, 18 Aug 2004 17:31:48 +0200, Thiemo Seufer <ica2_ts@xxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Tim Lai wrote: > > Thanks for the suggestion. > > I tried it, and still got the same error: > > > > /tmp/cc73TRSF.s:5521: Error: illegal operands `pref' > > That's because you use > > > > > " pref 4 , 0(%0) \n" > > > > > > > > ".set pop \n"); > > without defining %0 as a register input. > > > Thiemo >