From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
To: Florian Weimer <fweimer@redhat.com>, libc-alpha@sourceware.org
Subject: Re: [PATCH] powerpc: Use aligned stores in memset
Date: Fri, 18 Aug 2017 06:51:00 -0000 [thread overview]
Message-ID: <e04fa334-d4e1-0660-ec26-024e97024761@linux.vnet.ibm.com> (raw)
In-Reply-To: <b8fd7e0c-8108-a808-a9a2-0c2df8961275@redhat.com>
On 08/18/2017 11:51 AM, Florian Weimer wrote:
> On 08/18/2017 07:11 AM, Rajalakshmi Srinivasaraghavan wrote:
>> * sysdeps/powerpc/powerpc64/power8/memset.S: Store byte by byte
>> for unaligned inputs if size is less than 8.
>
> This makes me rather nervous. powerpc64le was supposed to have
> reasonable efficient unaligned loads and stores. GCC happily generates
> them, too.
This is meant ONLY for caching inhibited accesses. Caching Inhibited
accesses are required to be Guarded and properly aligned.
>
> Thanks,
> Florian
>
>
--
Thanks
Rajalakshmi S
next prev parent reply other threads:[~2017-08-18 6:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-18 5:13 Rajalakshmi Srinivasaraghavan
2017-08-18 6:21 ` Florian Weimer
2017-08-18 6:51 ` Rajalakshmi Srinivasaraghavan [this message]
2017-08-18 9:10 ` Florian Weimer
2017-08-18 12:13 ` Adhemerval Zanella
2017-09-12 10:30 ` Florian Weimer
2017-09-12 12:18 ` Zack Weinberg
2017-09-12 13:57 ` Steven Munroe
2017-09-12 14:37 ` Joseph Myers
2017-09-12 15:06 ` Zack Weinberg
2017-09-12 17:09 ` Florian Weimer
2017-09-12 13:38 ` Steven Munroe
2017-09-12 14:08 ` Florian Weimer
2017-09-12 14:16 ` Steven Munroe
2017-09-12 17:04 ` Florian Weimer
2017-09-12 19:21 ` Steven Munroe
2017-09-12 19:45 ` Florian Weimer
2017-09-12 20:25 ` Steven Munroe
2017-09-13 13:12 ` Tulio Magno Quites Machado Filho
2017-09-18 13:54 ` Florian Weimer
2017-10-03 18:29 ` Adhemerval Zanella
2017-10-05 12:13 ` Rajalakshmi Srinivasaraghavan
2017-11-08 18:52 ` Tulio Magno Quites Machado Filho
2017-12-08 19:52 ` [PATCHv2] powerpc: POWER8 memcpy optimization for cached memory Tulio Magno Quites Machado Filho
2017-12-08 20:06 ` Florian Weimer
2017-12-11 12:44 ` Tulio Magno Quites Machado Filho
2017-12-11 20:09 ` Adhemerval Zanella
2017-12-10 7:11 ` Rajalakshmi Srinivasaraghavan
2017-12-11 19:48 ` Tulio Magno Quites Machado Filho
2017-08-18 6:25 ` [PATCH] powerpc: Use aligned stores in memset Andrew Pinski
2017-08-21 2:20 ` Tulio Magno Quites Machado Filho
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