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Date: Thu, 16 Sep 2021 22:36:22 +0000
From: Joseph Myers <>
To: <>
CC: GNU C Library <>, <>
Subject: Re: Add new ABI '__memcmpeq()' to libc

On Thu, 16 Sep 2021, Chris Kennelly wrote:

> The mem* functions are extremely sensitive to instruction cache effects, so
> having 3 unique implementations (__memcmpeq, bcmp, memcmp) that do similar,

I don't think anyone is suggesting 3 unique implementations.  The 
obsolescent name bcmp would be aliased to either __memcmpeq or memcmp 
(depending on whether there are concerns about existing binaries depending 
on bcmp acting like memcmp).  (And __memcmpeq and memcmp would be aliases 
on architectures without a separate optimized __memcmpeq.)

Joseph S. Myers

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