From: Laurent GUERBY <laurent@guerby.net>
To: Loic Dachary <loic@dachary.org>
Cc: Kevin Greenan <kmgreen2@gmail.com>,
Ceph Development <ceph-devel@vger.kernel.org>
Subject: Re: GCC -msse2 portability question
Date: Tue, 25 Mar 2014 10:43:25 +0100 [thread overview]
Message-ID: <1395740605.15058.205.camel@pc2> (raw)
In-Reply-To: <5330A328.9060203@dachary.org>
On Mon, 2014-03-24 at 22:27 +0100, Loic Dachary wrote:
>
> On 23/03/2014 23:34, Laurent GUERBY wrote:
> > http://gcc.gnu.org/onlinedocs/gcc-4.8.2/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options
> >
> > So unless you want to run your code a very very old x86 32 bit processor
> > "-msse" shouldn't be an issue. "-msse2" is similar.
>
> This is good to know :) Should I be worried about unintended side effects of -msse4.2 -mssse3 -msse4.1 or -mpclmul ? These are the flags that gf-complete are using, specifically.
Hi,
SSE4.2 will be available only in more recent
processors as documented on the page above.
If your library already is dynamically checking for processor
feature I would advise to be conservative in your
-m flags, ie using what debian would use for maximum
x86 portability.
Sincerely,
Laurent
next prev parent reply other threads:[~2014-03-25 9:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-23 19:50 GCC -msse2 portability question Loic Dachary
2014-03-23 22:34 ` Laurent GUERBY
2014-03-24 21:27 ` Loic Dachary
2014-03-25 9:43 ` Laurent GUERBY [this message]
2014-03-25 9:56 ` Loic Dachary
2014-03-25 11:22 ` Laurent GUERBY
2014-03-25 14:44 ` Milosz Tanski
2014-03-25 18:45 ` Loic Dachary
2014-03-24 1:40 ` Sage Weil
2014-03-25 19:08 ` Loic Dachary
[not found] ` <CA+AFVBhpOZEPehsd4qHCBr4aRzv60ZW8LzRwKsduUrZmLV1wxQ@mail.gmail.com>
2014-03-25 19:21 ` Loic Dachary
2014-03-25 19:46 ` Milosz Tanski
[not found] ` <CA+AFVBgOEz8_fv9H-8_kOuVSJNL3KQ+36b5kscfjnRMs09DZ6Q@mail.gmail.com>
[not found] ` <53327E59.7060408@dachary.org>
[not found] ` <CANP1eJG9xoCPkFs19KXG1RPUqc-D3aO_0SBOM=4WWFRN2JtX=g@mail.gmail.com>
2014-03-26 18:24 ` Loic Dachary
[not found] ` <CANP1eJErc4qnRhtOCs=Cnh6VNtihLVcZxB1PSCQjpH0sFDBuWA@mail.gmail.com>
2014-03-26 22:13 ` Loic Dachary
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