From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <viktorin@rehivetech.com>
Received: from wes1-so1.wedos.net (wes1-so1.wedos.net [46.28.106.15])
 by dpdk.org (Postfix) with ESMTP id 8DD03235
 for <dev@dpdk.org>; Fri,  7 Jul 2017 17:56:52 +0200 (CEST)
Received: from pcviktorin.fit.vutbr.cz (dhcpz196.fit.vutbr.cz [147.229.14.196])
 by wes1-so1.wedos.net (Postfix) with ESMTPSA id 3x3zkW5BQjz3GW;
 Fri,  7 Jul 2017 17:56:51 +0200 (CEST)
Date: Fri, 7 Jul 2017 17:51:51 +0200
From: Jan Viktorin <viktorin@rehivetech.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: Jianbo Liu <jianbo.liu@linaro.org>, dev@dpdk.org
Message-ID: <20170707175151.2b1ac552.viktorin@rehivetech.com>
In-Reply-To: <8641088.RBqXrsVZZf@xps>
References: <8641088.RBqXrsVZZf@xps>
Organization: RehiveTech
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Subject: Re: [dpdk-dev] compilation error in l3fwd for ARMv7 NEON
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Fri, 07 Jul 2017 15:56:52 -0000

On Fri, 07 Jul 2017 17:24:38 +0200
Thomas Monjalon <thomas@monjalon.net> wrote:

> Hi Jianbo,
>=20
> It seems your NEON acceleration of the example l3fwd
> is not compiling for ARMv7:
> 	examples/l3fwd/l3fwd_neon.h:113:6: error:
> 	implicit declaration of function =E2=80=98vaddvq_u16=E2=80=99
>=20
> I am using gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf.
>=20
> Is it something we can fix easily?

It seems that the vaddvq_u16 is for AArch64 only. It is not listed in:

https://gcc.gnu.org/onlinedocs/gcc-4.6.1/gcc/ARM-NEON-Intrinsics.html

And e.g. here:

https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00162.html

they ifdef it for __aarch64.

Regards
Jan

--=20
   Jan Viktorin                  E-mail: Viktorin@RehiveTech.com
   System Architect              Web:    www.RehiveTech.com
   RehiveTech
   Brno, Czech Republic