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Re: Geometry test on NetBSD (was Re: [HACKERS] RC1?)

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: Patrick Welche <prlw1@newn.cam.ac.uk>, pgsql-hackers@postgresql.org, pgsql-ports@postgresql.org
Date: 2002-11-20T06:15:12Z
Lists: pgsql-hackers 
Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Tom, can you clarify why -0 is valid.

The IEEE spec absolutely thinks that -0 and +0 are distinct entities.
I don't remember why, at one in the morning ... but if you insist I'm
sure that plenty sufficient numerical-analysis reasons can be produced.
The guys who wrote that spec knew what they were doing (that's why it's
been adopted so universally).

			regards, tom lane