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Re: [PATCH] powerpc: Use aligned stores in memset

From: Rajalakshmi Srinivasaraghavan <raji at linux dot vnet dot ibm dot com>
To: Florian Weimer <fweimer at redhat dot com>, libc-alpha at sourceware dot org
Date: Fri, 18 Aug 2017 12:21:13 +0530
Subject: Re: [PATCH] powerpc: Use aligned stores in memset
Authentication-results: sourceware.org; auth=none
References: <1503033107-20047-1-git-send-email-raji@linux.vnet.ibm.com> <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 Inhibitedaccesses are required to be Guarded and properly aligned.


Thanks,
Florian


--
Thanks
Rajalakshmi S

Follow-Ups:
- Re: [PATCH] powerpc: Use aligned stores in memset
  - From: Florian Weimer

References:
- [PATCH] powerpc: Use aligned stores in memset
  - From: Rajalakshmi Srinivasaraghavan
- Re: [PATCH] powerpc: Use aligned stores in memset
  - From: Florian Weimer

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