On 2014-10-28 15:54:30 +0200, Heikki Linnakangas wrote: > On 10/28/2014 03:24 PM, Andres Freund wrote: > >On 2014-10-28 11:05:11 -0200, Arthur Silva wrote: > >>On Sat, Oct 25, 2014 at 12:38 PM, Andreas Karlsson <andr...@proxel.se> > >>As far as I'm aware int128 types are supported on every major compiler when > >>compiling for 64bit platforms. Right? > > > >Depends on what you call major. IIRC some not that old msvc versions > >don't for example. Also, there's a couple 32 platforms with int128 bit > >support. So I think we should just add a configure test defining the > >type + a feature macro. > > It wouldn't be too hard to just do: > > struct { > int64 high_bits; > uint64 low_bits; > } pg_int128; > > and some macros for the + - etc. operators. It might be less work than > trying to deal with the portability issues of a native C datatype for this.
And noticeably slower. At least x86-64 does all of this in hardware... Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers