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From: fche@redhat.com (Frank Ch. Eigler)
To: Doug Evans <dje@transmeta.com>
Cc: cgen@sources.redhat.com
Subject: Re: exposed pipeline patch (long!)
Date: Thu, 09 Jan 2003 17:17:00 -0000	[thread overview]
Message-ID: <o5adiaxmyh.fsf@toenail.toronto.redhat.com> (raw)
In-Reply-To: <15901.9079.191603.469002@casey.transmeta.com>


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

  reply	other threads:[~2003-01-09 17:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-01-09  3:27 Ben Elliston
2003-01-09  6:41 ` Doug Evans
2003-01-09 17:55   ` Frank Ch. Eigler
2003-01-09 18:36     ` Doug Evans
2003-01-09 19:14       ` Frank Ch. Eigler
2003-01-12 17:05         ` Doug Evans
2003-01-09 19:12     ` graydon hoare
2003-01-12 17:21       ` Doug Evans
2003-01-09  6:55 ` Doug Evans
2003-01-09  7:24 ` Doug Evans
2003-01-09 17:17   ` Frank Ch. Eigler [this message]
2003-01-12 17:54 ` Doug Evans

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