Article View: comp.arch
Article #20227Re: i860 overview (very very long)
From: Eugene Brooks
Date: Mon, 06 Mar 1989 22:57
Date: Mon, 06 Mar 1989 22:57
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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
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!vette!brooks 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