From: Jonathan Case Nicklin <nicklin@missioncriticallinux.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [linux-ia64] Predication vs. Branching
Date: Tue, 19 Sep 2000 12:18:08 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590678205504@msgid-missing> (raw)
Dan Pop wrote:
> On Tue, 19 Sep 2000, Jonathan Case Nicklin wrote:
>
> > This might not be the appropriate forum, but what the heck. Does anyone
> > have
> > a definitive answer on what happens to predicated instructions that are
> > not
> > executed (ie where in the pipeline are they discarded).
>
> According to the manual, they become NOPs of the appropriate type.
>
> Dan
Dan,
But When? Do they always consume execution resources or are they
dropped as soon as their predicate dependency is fulfilled... assuming their
dependent predicate evaluates false and that there are predicate dependent
instructions in the pipeline.
-Jonathan Nicklin
next reply other threads:[~2000-09-19 12:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-19 12:18 Jonathan Case Nicklin [this message]
2000-09-19 13:13 ` [linux-ia64] Predication vs. Branching Jonathan Case Nicklin
2000-09-19 15:07 ` Dan Pop
2000-09-19 15:45 ` Dan Pop
2000-09-19 19:22 ` FW: " Reed, Robert W
-- strict thread matches above, loose matches on Subject: below --
2000-09-19 11:45 Jonathan Case Nicklin
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