From: Christian Weisgerber <naddy@mips.inka.de>
Subject: Re: [PATCH] amd64: import optimized memcmp from FreeBSD
To: tech@openbsd.org
Date: Sat, 30 Nov 2024 20:06:39 +0100

Theo de Raadt:

> > FreeBSD already did all that work recently.
> > https://freebsdfoundation.org/blog/a-sneak-peek-simd-enhanced-string-functions-for-amd64/
> 
> That uses ifuncs.

Yes, and an environment variable to pick your implementation at
runtime.  Seriously.

None of that would keep us from just importing the variant optimized
for the architectural baseline, e.g. SSE2 for amd64 libc.

There are aarch64 versions as well.

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de