Re: Constant divisions, remainders

henry@zoo.toronto.edu (Henry Spencer)
Sun, 8 Nov 1992 04:39:53 GMT

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Newsgroups: comp.compilers
From: henry@zoo.toronto.edu (Henry Spencer)
Organization: U of Toronto Zoology
Date: Sun, 8 Nov 1992 04:39:53 GMT
References: 92-10-075 92-11-006
Keywords: arithmetic, comment

torbenm@diku.dk (Torben AEgidius Mogensen) writes:
>I think the round-to-zero rule for div and signed mod are relics from ones
>complement computers, and should be laid to rest.


Actually, I seem to recall that it is specifically a relic of FORTRAN,
which made a fairly arbitrary decision for the sake of well-defined
behavior, and has been too influential for machine designers to ignore
ever since.
--
Henry Spencer @ U of Toronto Zoology, henry@zoo.toronto.edu utzoo!henry
[Probably was based on the instruction set of the IBM 704. -John]
--

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