gcc with a cpu contain multiple risc units sharing the same register file.

[Jim Wilson]

mike@csdn.sign.idv.tw wrote:
>    I am porting gcc to a target cpu containing multiple risc units
>    sharing the same register file.
>    Can I use DFA to describe this target cpu?

Yes.

 >    I have read the gcc DFA manual, but I still cannot figure out how the
 >    describe the pipeline.

Try looking at DFA descriptions that have been written for other 
targets.  There are some simple ones that aren't too hard to understand, 
and you can learn a bit more about how this stuff works by looking at 
some of them.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com