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From: Adhemerval Zanella Netto <>
To:, Robert Clausecker <>
Subject: Re: [musl] strcmp() guarantees and assumptions
Date: Mon, 17 Jul 2023 13:22:05 -0300	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 16/07/23 18:13, Robert Clausecker wrote:
> Hi Markus,
>> Also, glibc already has an SSE strcmp implementation you may want to
>> look at.
> I'm not going to look at glibc as it's LGPL licensed.  I am aware of the
> Intel implementation, but I don't like that it has to duplicate the code
> 16 times for each possible misalignment pattern.  Without having to
> ensure that a cacheline of data is only touched once we confirm there
> is no previous mismatch, it might be possible to write simpler code, but
> I'm currently not entirely sure how.

On glibc side we have discussed the requirement of null-terminated for
string functions on some occasions [1][2][3] and we leaned toward allows
non-null terminated buffers for strncmp (where implementations must stop
are either first null or the at end of the buffer) and require 
null-terminated buffers for strcmp.


      reply	other threads:[~2023-07-17 16:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-16 17:22 Robert Clausecker
2023-07-16 17:49 ` NRK
2023-07-16 17:59   ` Robert Clausecker
2023-07-16 19:24     ` Pedro Falcato
2023-07-16 19:29       ` Pedro Falcato
2023-07-16 19:33     ` Markus Wichmann
2023-07-16 21:13       ` Robert Clausecker
2023-07-17 16:22         ` Adhemerval Zanella Netto [this message]

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