Re: Add RISC-V Zbb popcount optimization

From: John Naylor <johncnaylorls(at)gmail(dot)com>
To: Greg Burd <greg(at)burd(dot)me>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Add RISC-V Zbb popcount optimization
Date: 2026-03-22 02:14:09
Message-ID: CANWCAZb1rmrYay7ewsWXkR31qBomcm-a8emNX=Cf5ndC3qpZeQ@mail.gmail.com
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On Sat, Mar 21, 2026 at 11:56 PM Greg Burd <greg(at)burd(dot)me> wrote:
> Attached is a small patch that enables hardware popcount on RISC-V when available and also sets the arch flag to 'rv64gc_zbb' flag when appropriate.

I have to ask what the point is -- isn't that like putting a 4-inch
exhaust tip on a go-kart?

--
John Naylor
Amazon Web Services

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