From: Thorsten Glaser <tg@mirbsd.de>
To: musl@lists.openwall.com
Cc: James Tirta Halim <tirtajames45@gmail.com>
Subject: Re: [musl] [PATCH] add memcmpeq: memcmp that returns length of first mismatch
Date: Thu, 29 Feb 2024 00:10:05 +0000 (UTC) [thread overview]
Message-ID: <Pine.BSM.4.64L.2402290007490.1531@herc.mirbsd.org> (raw)
In-Reply-To: <CAKbZUD2XSZ4MdoS0JoyhJU=1yxVQywqzpRTuLrMPusKtYgOoSA@mail.gmail.com>
Pedro Falcato dixit:
>Small note: This isn't quite true for remotely modern x86, unaligned
It’s very much true, e.g. it breaks atomicity (ok, not relevant
*here*, but in general).
AIUI, even modern amd64 chips of all vendors are reverting to
optimising rep movsb/lodsb instead again, for stringops.
Of course the status on other architectures should be sufficient to
not use unaligned accesses.
bye,
//mirabilos
--
08:05⎜<XTaran:#grml> mika: Does grml have an tool to read Apple
⎜ System Log (asl) files? :)
08:08⎜<ft:#grml> yeah. /bin/rm. ;) 08:09⎜<mrud:#grml> hexdump -C
08:31⎜<XTaran:#grml> ft, mrud: *g*
next prev parent reply other threads:[~2024-02-29 0:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-27 14:07 James Tirta Halim
2024-02-27 14:49 ` Rich Felker
2024-02-27 14:51 ` Rich Felker
2024-02-28 4:40 ` Markus Wichmann
2024-02-28 23:14 ` Thorsten Glaser
2024-02-29 0:02 ` Pedro Falcato
2024-02-29 0:10 ` Thorsten Glaser [this message]
2024-02-29 0:57 ` Robert Clausecker
2024-02-29 1:13 ` Pedro Falcato
2024-02-29 4:19 ` Markus Wichmann
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