Re: exposed pipeline patch (long!)

[fche at redhat dot com (Frank Ch. Eigler)]

dje wrote:

> Handling exposed pipelines can get really messy
> when one takes bypass networks into account.

... right, which is why we don't model bypass networks at all in RTL.

> Question: For the ports in question, are the delays ISA related
> or implementation related?
> If they're ISA related then specifying the delays in rtl is appropriate.
> [...]

That's right.

> One way to go would be to specify the hazards independently of the rtl.

Right, and to some extent, the cgen "model" machinery may enable this.
They are orthogonal animals.


- FChE