Horton

Re: Optimize numeric multiplication for one and two base-NBASE digit multiplicands.

Dean Rasheed <dean.a.rasheed@gmail.com>

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From: Dean Rasheed <dean.a.rasheed@gmail.com>
To: Joel Jacobson <joel@compiler.org>
Cc: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2024-07-09T09:11:24Z
Lists: pgsql-hackers 
On Sat, 6 Jul 2024 at 12:17, Joel Jacobson <joel@compiler.org> wrote:
>
> > I think this is good to go, so unless there are any further comments,
> > I plan to commit it soon.
>
> LGTM.
>

OK, I have committed this.

At the last minute, I changed the name of the new function to
mul_var_short() because "short" is probably a better term to use in
this context (we already use it in a preceding comment). "Small" is
potentially misleading, because the numbers themselves could be
numerically very large.

Regards,
Dean

Commits

  1. Optimise numeric multiplication for short inputs.

  2. Optimise numeric division for 3 and 4 base-NBASE digit divisors.

  3. Optimise numeric division for one and two base-NBASE digit divisors.