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Article #11048Re: 64 bit Alpha AXP -vs- 32 bit computers
From: Preston Briggs
Date: Tue, 17 Nov 1992 17:14
Date: Tue, 17 Nov 1992 17:14
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kneuper@chpc.utexas.edu (Stephen Kneuper) writes: >I'm trying to figure out why I want to go to a 64 bit machine Alpha >AXP system instead of continuing to run 32 bit machines (RS6K, Sun). > >Outside of the numerical analysis issues, Durn... And after all the nice debate over 32x32 => 64. Another nice use is to speed up bit-wise computation. For example, many compilers do lots of data-flow analysis, summarizing results in long bit vectors; say, O(1000) bit chunks. It's surely faster to AND and OR these things 64 bits at a time, not to mention the reduced fetches from cache. Preston Briggs
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Newsgroups: comp.arch Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!sdd.hp.com!wupost!bcm!rice!miranda.cs.rice.edu!preston From: preston@miranda.cs.rice.edu (Preston Briggs) Subject: Re: 64 bit Alpha AXP -vs- 32 bit computers Message-ID: <BxvEJw.6Bu@rice.edu> Sender: news@rice.edu (News) Organization: Rice University, Houston References: <1992Nov17.162014.6506@chpc.utexas.edu> Date: Tue, 17 Nov 1992 17:14:19 GMT Lines: 16