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Re: [PATCH] Group AVX512 functions in .text.avx512 section
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Florian Weimer <fweimer at redhat dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Mon, 7 Mar 2016 07:54:16 -0800
- Subject: Re: [PATCH] Group AVX512 functions in .text.avx512 section
- Authentication-results: sourceware.org; auth=none
- References: <1457289968-8965-1-git-send-email-hjl dot tools at gmail dot com> <56DD979E dot 7020009 at redhat dot com>
On Mon, Mar 7, 2016 at 7:00 AM, Florian Weimer <fweimer@redhat.com> wrote:
> On 03/06/2016 07:46 PM, H.J. Lu wrote:
>> * sysdeps/x86_64/multiarch/memcpy-avx512-no-vzeroupper.S:
>> Replace .text with .text.avx512.
>> * sysdeps/x86_64/multiarch/memset-avx512-no-vzeroupper.S:
>> Likewise.
>
> What's the rationale for this change?
>
All multiarch functions are grouped in .text.ISA sections so that
the mos likely selected implementations are next to each other
in memory. It will improve cache performance.
--
H.J.