Re: Some optimisations for numeric division

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

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

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

Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2022-02-25T12:43:48Z

Lists: pgsql-hackers

Attachments

0001-Apply-auto-vectorization-to-the-inner-loop-of-div_va.patch (text/x-patch) patch 0001
0002-Simplify-the-inner-loop-of-numeric-division-in-div_v.patch (text/x-patch) patch 0002
0003-Optimise-numeric-division-for-one-and-two-base-NBASE.patch (text/x-patch) patch 0003

On Fri, 25 Feb 2022 at 10:45, Dean Rasheed <dean.a.rasheed@gmail.com> wrote:
>
> Attached is the updated patch series (0001 and 0002 unchanged).
>

And another update following feedback from the cfbot.

Regards,
Dean

Commits

Optimise numeric division for one and two base-NBASE digit divisors.
- d1b307eef281 15.0 landed
Simplify the inner loop of numeric division in div_var().
- d996d648f333 15.0 landed
Apply auto-vectorization to the inner loop of div_var_fast().
- e3d41d08a175 15.0 landed
Apply auto-vectorization to the inner loop of numeric multiplication.
- 88709176236c 14.0 cited