From: Helge Deller <deller@gmx.de>
To: Matt Turner <mattst88@gmail.com>
Cc: linux-parisc <linux-parisc@vger.kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
John David Anglin <dave.anglin@bell.net>
Subject: Re: [PATCH] parisc: Add assembly implementations for strlen, strcpy, strncpy and strcat
Date: Thu, 7 Feb 2019 23:21:52 +0100 [thread overview]
Message-ID: <a2f5a38f-61bf-ec8a-b855-49f88b59905d@gmx.de> (raw)
In-Reply-To: <CAEdQ38Eb4=i6ED-Ndgqu59C8Nmw-6ECVbm3snxSi06LgHn-sCA@mail.gmail.com>
On 07.02.19 18:46, Matt Turner wrote:
> On Wed, Feb 6, 2019 at 2:21 PM Helge Deller <deller@gmx.de> wrote:
>>
>> Add performance-optimized versions of the strlen, strcpy, strncpy and
>> strcat string functions.
>
> Can you say anything else about them?
No.
> E.g., are you using some feature that the compiler isn't able to
> generate?
Some assembler instructions are used which the compiler doesn't
use by default for such use cases.
> Do you have performance data?
Not yet.
Maybe someone wants to do that?
> Except for strlen, they look like straightforward translations of the
> simple C implementations.
The code is much smaller than what the compiler generates and
the layout of the bytes-stores are targetted the behaviour of
the parisc 64bit CPUs.
Helge
next prev parent reply other threads:[~2019-02-07 22:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-06 22:21 [PATCH] parisc: Add assembly implementations for strlen, strcpy, strncpy and strcat Helge Deller
2019-02-07 16:24 ` Sven Schnelle
2019-02-07 17:46 ` Matt Turner
2019-02-07 22:21 ` Helge Deller [this message]
2019-02-07 22:53 ` Matt Turner
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