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Article #10267Re: Bitfield instructions
From: Lawrence D'Oliveiro, Waikato Uni...
Date: Tue, 16 Apr 1991 03:30
Date: Tue, 16 Apr 1991 03:30
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The example I mentioned was a decompressor for pixel data stored in a GIF (Graphics Interchange Format) file. This is compressed according to a variant of the LZW algorithm, with a variable-length symbol size. In short, there's an awful lot of bit manipulation going on. I just wondered, when RISC designers talk about "dynamic instruction frequencies", what mix of programs they start with. Would you include an LZW compressor/decompressor in your mix? What weighting would you assign it? What are the grounds for your decision? Lawrence D'Oliveiro fone: +64-71-562-889 Computer Services Dept fax: +64-71-384-066 University of Waikato electric mail: ldo@waikato.ac.nz Hamilton, New Zealand 37^ 47' 26" S, 175^ 19' 7" E, GMT+12:00 To someone with a hammer and a screwdriver, every problem looks like a nail with threads.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!know!sdd.hp.com!wuarchive!waikato.ac.nz!ldo From: ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University) Newsgroups: comp.arch Subject: Re: Bitfield instructions Message-ID: <1991Apr16.153010.3446@waikato.ac.nz> Date: 16 Apr 91 03:30:10 GMT References: <1991Apr15.193425.3436@waikato.ac.nz> <2302@spim.mips.COM> Organization: University of Waikato, Hamilton, New Zealand Lines: 16