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- Path: sparky!uunet!comp.vuw.ac.nz!waikato.ac.nz!ldo
- From: ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: AIFF and 'extended' type
- Message-ID: <1992Aug20.181459.10250@waikato.ac.nz>
- Date: 20 Aug 92 18:14:59 +1200
- References: <1992Aug17.204116.11424@nosc.mil> <1992Aug19.100049.10187@waikato.ac.nz> <1992Aug20.013819.7382@eng.umd.edu>
- Organization: University of Waikato, Hamilton, New Zealand
- Lines: 20
-
- In article <1992Aug20.013819.7382@eng.umd.edu>, russotto@eng.umd.edu (Matthew T. Russotto) writes:
- > In article <1992Aug19.100049.10187@waikato.ac.nz> ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University) writes:
- >>
- >>It's interesting that Apple's guidelines state that the extended type is
- >>only meant for intermediate temporary values, to minimize rounding errors
- >>in multi-step calculations: you should *not* use it as a type for permanent
- >>storage of data. And yet they go and break their own guidelines with AIFF...
- >
- > That's because the 64-bit type (COMP in pascal, I don't remember in
- > 'C'-- possibly "short double") is dog-slow due to all the
- > conversions, and really wrecks the advantage of an FPU, too.
-
- Yes, but that shouldn't be a significant factor for loading and saving data on
- permanent storage (i e disk).
-
- Lawrence D'Oliveiro fone: +64-7-856-2889
- Computer Services Dept fax: +64-7-838-4066
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