| From: | Uncle George <gatgul(at)voicenet(dot)com> |
|---|---|
| To: | Ryan Kirkpatrick <pgsql(at)rkirkpat(dot)net>, pgsql-hackers(at)postgreSQL(dot)org, pgsql-patches(at)postgreSQL(dot)org, pgsql-ports(at)postgreSQL(dot)org, Lamar Owen <lamar(dot)owen(at)wgcr(dot)org> |
| Subject: | Re: [PORTS] Linux/Alpha patches for Postgresql 6.5.2 |
| Date: | 1999-09-19 10:34:10 |
| Message-ID: | 37E4BC22.31C8461B@voicenet.com |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-ports |
Not its not. It is the 'cost' of the 'parsed' branch trees that are causing the final
display to be slightly different. If one were to change the size of an 'internal' 'C struct'
to be the same size of an 'i386' 'C struct' then the results are the same ( or at least make
the sizeof() values the same ) then the results would be the same.
as for the differences in the 'off by a small fraction' is due to i386 having 80bit float
operations, and the alpha does 64bit float operations. ( Both under the same ieee mandate to
do the same algorithm)
gat
Ryan Kirkpatrick wrote:
> The only regression tests that are failing are the sames ones as
> for 6.5.1, geometry (off by one in nth decimal place) and rules (with
> no-predefined sorting method, alpha's default sort is different than the
> rest).
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