Article View: comp.arch
Article #12373Re: How many vector registers are useful?
From: Bob Alverson
Date: Tue, 26 Jan 1993 17:32
Date: Tue, 26 Jan 1993 17:32
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1306 bytes
In article <93-01-174@comp.compilers> kirchner@uklira.informatik.uni-kl.de (Reinhard Kirchner) writes: > >The Fujitsu machines with their reconfigurable register file of 32 or >64kb, which is 4k or 8k words, being grouped from 256 register a 16/32 >words to 8 registers a 512/1024 words. > >Now there is the question: is such a large register file useful at all ? Besides serving as a software cache, a register file also serves as a prefetch area (something caches are doing now, too). So, you might want more registers as your memory latency increases. Of course, more registers only help if your processor can use them. For a vector machine, you might need longer vectors to cover longer memory latency. Bob
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<1993Jan26.173220.25989@tera.com>Path:
arc1-ca.pugleaf.net!sparky!uunet!ferkel.ucsb.edu!taco!gatech!emory!swrinde!zaphod.mps.ohio-state.edu!usc!howland.reston.ans.net!bogus.sura.net!udel!rochester!cornell!uw-beaver!tera.com!bobReferences:
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Newsgroups: comp.arch Path: arc1-ca.pugleaf.net!sparky!uunet!ferkel.ucsb.edu!taco!gatech!emory!swrinde!zaphod.mps.ohio-state.edu!usc!howland.reston.ans.net!bogus.sura.net!udel!rochester!cornell!uw-beaver!tera.com!bob From: bob@tera.com (Bob Alverson) Subject: Re: How many vector registers are useful? Message-ID: <1993Jan26.173220.25989@tera.com> Followup-To: comp.arch Keywords: architecture, question Sender: news@tera.com (News Administrator) Organization: Tera Computer Company, Seattle, WA References: <93-01-174@comp.compilers> Date: Tue, 26 Jan 1993 17:32:20 GMT Lines: 15