new cpu's for rs6000 target

[Richard Henderson]

On Fri, Sep 21, 2001 at 12:35:09PM -0700, Dale Johannesen wrote:
> >> (define_function_unit "iu" 1 0
> >>    (and (eq_attr "type" "compare,delayed_compare")
> >>         (eq_attr "cpu" "ppc750,ppc7400"))
> >>    1 1  [(eq_attr "type" "!branch")])
> >>
> >> (define_function_unit "iu" 1 0
> >>    (and (eq_attr "type" "compare,delayed_compare")
> >>         (eq_attr "cpu" "ppc750,ppc7400"))
> >>    3 1  [(eq_attr "type" "branch")])
> >
> This means:  if the compare/delayed_compare is followed by a dependent 
> branch, assume a 3-cycle issue delay; if followed by anything else, assume 
> a 1-cycle issue delay.

Not really.  This doesn't model a producer/consumer relationship,
only a before/after issue relationship.  What you want is to 
manipulate ADJUST_COST.


r~