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From: brooks@vette.llnl.gov (Eugene Brooks)
Newsgroups: comp.arch,comp.sys.intel
Subject: Re: i860 overview (very very long)
Keywords: i860, 80860, iapx860, timing, opcodes, instructions, menmonics, pipelines
Message-ID: <21486@lll-winken.LLNL.GOV>
Date: 6 Mar 89 22:57:58 GMT
References: <807@microsoft.UUCP> <808@microsoft.UUCP>
Sender: usenet@lll-winken.LLNL.GOV
Reply-To: brooks@maddog.llnl.gov.UUCP (Eugene Brooks)
Followup-To: comp.arch
Organization: Lawrence Livermore National Laboratory
Lines: 12

In article <808@microsoft.UUCP> w-colinp@microsoft.uucp (Colin Plumb) writes:
>So initially, you must stick a few operations into the pipeline, throwing
>away whatever was there (writing it to f0), then you can pump through
>lots of data, then you have to stick in a few junk computations to get the
>last few results.
It would appear that this exposed pipeline would straightjacket future
i860 implementations which might want to change the pipeline latency of
the floating point units, or perhaps get the double multiply to do one
result per clock cycle.  Is this true?

Is the news software incompatible with your mailer too?
brooks@maddog.llnl.gov, brooks@maddog.uucp, uunet!maddog.llnl.gov!brooks