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Re: [PATCH] powerpc64: strrchr optimization for power8
- From: Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>
- To: Rajalakshmi Srinivasaraghavan <raji at linux dot vnet dot ibm dot com>, <libc-alpha at sourceware dot org>
- Date: Tue, 21 Feb 2017 14:01:48 -0300
- Subject: Re: [PATCH] powerpc64: strrchr optimization for power8
- Authentication-results: sourceware.org; auth=none
- References: <1487070321-27700-1-git-send-email-raji@linux.vnet.ibm.com>
On 2/14/17, 9:05 AM, "Rajalakshmi Srinivasaraghavan" <libc-alpha-owner@sourceware.org on behalf of raji@linux.vnet.ibm.com> wrote:
Changes from previous version [1]
- Comments correction and alignment changes.
--
P7 code is used for <=32B strings and for > 32B vectorized loops are used.
This shows as an average 25% improvement depending on the position of search
character. The performance is same for shorter strings.
Tested on ppc64 and ppc64le.
LGTM.
--
Carlos Eduardo Seo
Software Engineer - Linux on Power Toolchain
cseo@linux.vnet.ibm.com