From: Gavin Hu <Gavin.Hu@arm.com>
To: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
"bruce.richardson@intel.com" <bruce.richardson@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"rasland@mellanox.com" <rasland@mellanox.com>,
"therbert@redhat.com" <therbert@redhat.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH] build: enable Arm NEON flags when __aarch64__ is defined
Date: Wed, 29 Aug 2018 07:01:46 +0000 [thread overview]
Message-ID: <VI1PR08MB3167811589C468405F10EB6E8F090@VI1PR08MB3167.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <1534950067-113999-1-git-send-email-honnappa.nagarahalli@arm.com>
> -----Original Message-----
> From: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Sent: Wednesday, August 22, 2018 11:01 PM
> To: bruce.richardson@intel.com
> Cc: dev@dpdk.org; Gavin Hu <Gavin.Hu@arm.com>; rasland@mellanox.com;
> therbert@redhat.com; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>
> Subject: [PATCH] build: enable Arm NEON flags when __aarch64__ is defined
>
> GCC version 4.8.5 does not pre-define __ARM_NEON. NEON is not optional
> for ArmV8. Hence NEON related code can be enabled when __aarch64__ is
> defined.
>
> Bugzilla ID: 82
>
> Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Reviewed-by: Phil Yang <phil.yang@arm.com>
> Reviewed-by: Gavin Hu <gavin.hu@arm.com>
> Reported-by: Raslan Darawsheh <rasland@mellanox.com>
> Reported-by: Thomas F Herbert <therbert@redhat.com>
Acked-by: Gavin Hu <gavin.hu@arm.com>
> ---
> config/arm/meson.build | 3 ++-
> mk/rte.cpuflags.mk | 2 +-
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/config/arm/meson.build b/config/arm/meson.build index
> 40dbc87f7..94cca490e 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -157,7 +157,8 @@ else
> endif
> message(machine_args)
>
> -if cc.get_define('__ARM_NEON', args: machine_args) != ''
> +if (cc.get_define('__ARM_NEON', args: machine_args) != '' or
> + cc.get_define('__aarch64__', args: machine_args) != '')
> dpdk_conf.set('RTE_MACHINE_CPUFLAG_NEON', 1)
> compile_time_cpuflags += ['RTE_CPUFLAG_NEON'] endif diff --git
> a/mk/rte.cpuflags.mk b/mk/rte.cpuflags.mk index 60713137d..43ed84155
> 100644
> --- a/mk/rte.cpuflags.mk
> +++ b/mk/rte.cpuflags.mk
> @@ -89,7 +89,7 @@ CPUFLAGS += VSX
> endif
>
> # ARM flags
> -ifneq ($(filter $(AUTO_CPUFLAGS),__ARM_NEON),)
> +ifneq ($(filter __ARM_NEON __aarch64__,$(AUTO_CPUFLAGS)),)
> CPUFLAGS += NEON
> endif
>
> --
> 2.17.1
next prev parent reply other threads:[~2018-08-29 7:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-22 15:01 Honnappa Nagarahalli
2018-08-29 7:01 ` Gavin Hu [this message]
2018-08-29 7:21 ` Jerin Jacob
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