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Message-ID: <YesAqsfgEpBsEAOy@bec.de>
Date: Fri, 21 Jan 2022 19:51:22 +0100
From: Joerg Sonnenberger <joerg@....de>
To: libc-coord@...ts.openwall.com
Cc: GNU C Library <libc-alpha@...rceware.org>,
Richard Biener via Gcc <gcc@....gnu.org>
Subject: Re: Add new ABIs '__strcmpeq', '__strncmpeq',
'__wcscmpeq' and '__wcsncmpeq' to libc
On Thu, Jan 20, 2022 at 04:56:59PM -0600, Noah Goldstein wrote:
> The goal is that the new interfaces will be usable as an optimization
> by compilers if a program uses the return value of the non "eq"
> variant as a boolean.
So I'm curious, but can you demonstrate that it can be implemented
notacibly faster than regular strcmp? Unlike for memcmp, I don't see an
obvious way to save any operations.
Joerg
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