linux-kernel - Re: [PATCH 02/17] bitops: Add generic parity calculation for u64

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Message-ID: <8052b316-9f72-42c7-9e11-e23e690d80c4@citrix.com>
Date: Tue, 25 Feb 2025 21:43:27 +0000
From: Andrew Cooper <andrew.cooper3@...rix.com>
To: hpa@...or.com
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Subject: Re: [PATCH 02/17] bitops: Add generic parity calculation for u64

> Incidentally, in all of this, didn't anyone notice __builtin_parity()?

Yes.  It it has done sane for a decade on x86, yet does things such as
emitting a library call on other architectures.

https://godbolt.org/z/6qG3noebq

~Andrew