home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.arch:9417 comp.lang.misc:3069
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!orstcs!orstcs!usenetusenet
- From: crowl@jade.CS.ORST.EDU (Lawrence Crowl)
- Newsgroups: comp.arch,comp.lang.misc
- Subject: Re: Goals, Cost, and Flexibility (was Re: "Training" of programmers)
- Message-ID: <1992Sep14.194436.6726@CS.ORST.EDU>
- Date: 14 Sep 92 19:44:36 GMT
- Article-I.D.: CS.1992Sep14.194436.6726
- References: <BuFK3y.3H5@mentor.cc.purdue.edu> <1992Sep13.033602.3708@CS.ORST.EDU> <BuJ3qG.2FD@mentor.cc.purdue.edu>
- Sender: usenet@CS.ORST.EDU
- Organization: Oregon State University, Corvallis Oregon
- Lines: 30
- Nntp-Posting-Host: jade.cs.orst.edu
-
- In article <BuJ3qG.2FD@mentor.cc.purdue.edu>
- hrubin@pop.stat.purdue.edu (Herman Rubin) writes:
- >In article <1992Sep13.033602.3708@CS.ORST.EDU>
- >crowl@jade.CS.ORST.EDU (Lawrence Crowl) writes:
- >>word processing, spread-sheeting, etc. for six years, and I don't think she's
- >>ever done a characteristic root.
- >
- >Who would expect procedures like that to make good use of square roots?
-
- Which is my point. You tell me what a architectural feature costs, and what
- alogorithms it improves, and I'll decide whether those costs and benefits are
- appropriate to my application. (Or, if I were making a machine, whether it
- is appropriate to my potential customers.)
-
- >I suspect that if fixed-point arithmetic were used for spreadsheets, it
- >would be faster than floating.
-
- It wouldn't suprise me. Fixed-point is also faster on the Mandelbrot set.
-
- >I suggest you try generating non-uniform random numbers. The fastest
- >algorithms by far are acceptance-rejection and related ones.
-
- Now we're getting somewhere. What specific architectural features speed up
- the generation of such numbers; what do you expect to be the speed up to be;
- and what do you expect the cost to be?
-
- --
- Lawrence Crowl 503-737-2554 Computer Science Department
- crowl@cs.orst.edu Oregon State University
- ...!hplabs!hp-pcd!orstcs!crowl Corvallis, Oregon, 97331-3202
-