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Article #22155Re: CISC Silent Spring
From: Henry Spencer
Date: Mon, 05 Feb 1990 21:12
Date: Mon, 05 Feb 1990 21:12
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In article <25cb6b65.702c@polyslo.CalPoly.EDU> jdudeck@polyslo.CalPoly.EDU (John R. Dudeck) writes: >Now the tables are turned, because the cpu designers have figured out >how to get the cisc chips to perform the complex instruction in the same clock >cycle that the risc chip takes to perform the simple instruction... No, they've figured out how to make tomorrow's CISC chips perform the simpler instructions in the same clock cycle that yesterday's RISC chips took to perform similarly simple operations. The complicated instructions are still slow (and still rarely used), the RISCs still have a built-in lead due to shorter design times, and the CISCs still have a built-in handicap due to the mass of instruction/decoding/exception baggage dragging along behind their RISC-like cores. -- SVR4: every feature you ever | Henry Spencer at U of Toronto Zoology wanted, and plenty you didn't.| uunet!attcan!utzoo!henry henry@zoo.toronto.edu
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Newsgroups: comp.arch Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@utzoo.uucp (Henry Spencer) Subject: Re: CISC Silent Spring Message-ID: <1990Feb5.211208.15741@utzoo.uucp> Organization: U of Toronto Zoology References: <3300098@m.cs.uiuc.edu> <771@sce.carleton.ca> <35456@mips.mips.COM> <25cb6b65.702c@polyslo.CalPoly.EDU> Date: Mon, 5 Feb 90 21:12:08 GMT