Thank you Paolo, I'll take a look at it.
Is there a reason why the fcmp insn was dropped with such implementation?
- Jamie
----- Original Message ----
> From: Paolo Bonzini <bonz...@gnu.org>
> To: Jamie Prescott <jpre...@yahoo.com>
> Cc: gcc@gcc.gnu.org
> Sent: Tuesday, May 12, 2009 1:31:53 AM
> Subject: Re: Code generation problem with optimizations enabled
>
> > What I noticed is that if I CC_STATUS_INIT (in xxx_notice_update_cc()) even
> for insn that
> > do not require it (that are almost all of them - being only cmp/fcmp/test
> > that
> modify cc0),
> > cmpdf gets emitted regularly.
>
> If so, you should not be using cc0, but a CCmode register instead.
>
> See for example how the fr30 port implements compare-and-jump. I'm
> currently committing a merge that changes a bit how the
> compare-and-jumps are realized; if you wait a few hours, you'll get a
> more up-to-date example.
>
> Paolo
