From: Sascha Hauer <s.hauer@pengutronix.de>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: "open list:BAREBOX" <barebox@lists.infradead.org>,
Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: Re: [PATCH v2 10/10] ARM: add optimized memmove
Date: Fri, 27 Sep 2024 12:04:46 +0200 [thread overview]
Message-ID: <ZvaDPkeS6ua7iZXu@pengutronix.de> (raw)
In-Reply-To: <20240927051215.67lqwfarfcdnzbsq@pengutronix.de>
On Fri, Sep 27, 2024 at 07:12:15AM +0200, Marco Felsch wrote:
> Hi Sascha,
>
> On 24-09-26, Sascha Hauer wrote:
> > Until now there has been no assembler optimized version of memmove() for
> > ARM. Add this from Linux-6.10 for both ARM32 and ARM64. This also updates
> > memcpy() for ARM64 from Linux-6.10.
>
> out of curiosity, did you made performance measurements?
No, I haven't made any performance measurements. I implemented this for
framebuffer console rotation support. When moving a framebuffer one line
left or right it's the difference between night and day. Otherwise I
think memmove is rarely used in barebox.
Sascha
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next prev parent reply other threads:[~2024-09-27 10:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-26 11:17 [PATCH v2 00/10] ARM: add assembler " Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 01/10] ARM: Use optimized reads[bwl] and writes[bwl] functions Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 02/10] ARM: rename logical shift macros push pull into lspush lspull Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 03/10] ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 04/10] ARM: update lib1funcs.S from Linux Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 05/10] ARM: update findbit.S " Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 06/10] ARM: update io-* " Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 07/10] ARM: always assume the unified syntax for assembly code Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 08/10] ARM: update memcpy.S and memset.S from Linux Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 09/10] lib/string.c: export non optimized memmove as __default_memmove Sascha Hauer
2024-09-26 11:17 ` [PATCH v2 10/10] ARM: add optimized memmove Sascha Hauer
2024-09-27 5:12 ` Marco Felsch
2024-09-27 10:04 ` Sascha Hauer [this message]
2024-09-27 10:39 ` [PATCH v2 00/10] ARM: add assembler " Sascha Hauer
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