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- Newsgroups: comp.arch
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!jvnc.net!yale.edu!think.com!paperboy.osf.org!meissner
- From: meissner@osf.org (Michael Meissner)
- Subject: Re: Goals, Cost, and Flexibility (was Re: "Training" of programmers)
- In-Reply-To: john@theus.rain.com's message of Sun, 13 Sep 1992 08:08:43 GMT
- Message-ID: <MEISSNER.92Sep14150929@curley.osf.org>
- Sender: news@osf.org (USENET News System)
- Organization: Open Software Foundation
- References: <1992Sep11.184744.19329@CS.ORST.EDU> <BuFK3y.3H5@mentor.cc.purdue.edu>
- <1992Sep13.033602.3708@CS.ORST.EDU>
- <1992Sep13.080843.7741@theus.rain.com>
- Date: 14 Sep 92 15:09:29
- Lines: 36
-
- In article <1992Sep13.080843.7741@theus.rain.com> john@theus.rain.com
- (John Theus) writes:
-
- | In article <1992Sep13.033602.3708@CS.ORST.EDU> crowl@jade.CS.ORST.EDU (Lawrence Crowl) writes:
- | >
- | >I've been computing for 17 years, and in all that time I don't think I've
- | >done characteristic roots more than a couple of times. My sister has been
- | >word processing, spread-sheeting, etc. for six years, and I don't think she's
- | >ever done a characteristic root. So, 23 years of computing, 2 roots.
- | >
- | If you're using an ASCII display, then you may not be doing any roots. If you
- | ever do any serious graphics work, then its likely that square root is heavy
- | used. I used to be a system architect designing 3D graphics workstations for
- | applications like mechanical CAE/CAD. Root performance was always critical in
- | those systems, and our RISC processor vendors payed attention when we
- | complained about their lack of square root hardware.
- |
- | Now, maybe you think the graphics market is unimportant to the RISC processor
- | vendors, but if that is so, why do several of the current generation parts
- | have graphics execution units?
-
- I would expect that the typical company doing the Nth version of an
- architecture (where N >= 2), will typically have various incentives,
- requirements, etc. that the engineers use the N-m machine (typically
- whatever the highend machine currently in production) to design the
- chip. I know this was true at Data General, and I believe I read
- somewhere that MIPS used the R6000 to design the R4000. Given this,
- after one rev of the chip, you are one of your own customers. Since
- CAD apps use lots of square roots and graphics, it would make sense to
- think about putting it in hardware.
-
- --
- Michael Meissner email: meissner@osf.org phone: 617-621-8861
- Open Software Foundation, 11 Cambridge Center, Cambridge, MA, 02142
-
- You are in a twisty little passage of standards, all conflicting.
-