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Thu, 4 Feb 2021 07:59:45 -0500 (EST)
From: Thomas Monjalon <thomas@monjalon.net>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: "Zhang, Qi Z" <qi.z.zhang@intel.com>,
Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, "Rong, Leyi" <leyi.rong@intel.com>,
"david.marchand@redhat.com" <david.marchand@redhat.com>, "Richardson,
Bruce" <bruce.richardson@intel.com>, "talshn@nvidia.com" <talshn@nvidia.com>,
"Kadam, Pallavi" <pallavi.kadam@intel.com>, "Menon,
Ranjit" <ranjit.menon@intel.com>, "Xing, Beilei" <beilei.xing@intel.com>,
"aconole@redhat.com" <aconole@redhat.com>, "dev@dpdk.org" <dev@dpdk.org>,
"ci@dpdk.org" <ci@dpdk.org>
Date: Thu, 04 Feb 2021 13:59:44 +0100
Message-ID: <1660039.Gq7iE7GDot@thomas>
In-Reply-To: <d9457302-47c6-988b-6765-5eb4d64fc94c@intel.com>
References: <20210202090639.83164-1-leyi.rong@intel.com>
<5ec7623cbb604753bb70fa9f4b0a7c3a@intel.com>
<d9457302-47c6-988b-6765-5eb4d64fc94c@intel.com>
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Subject: Re: [dpdk-dev] [PATCH v2] net/i40e: fix avx code error on MinGW
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04/02/2021 13:36, Ferruh Yigit:
> On 2/4/2021 10:41 AM, Zhang, Qi Z wrote:
> > From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> >> On Tue, 2 Feb 2021 22:32:58 +0800, Leyi Rong wrote:
> >>> Adds extra cflags '-fno-asynchronous-unwind-tables'
> >>> to avoid the MinGW build error:
> >>> Error: invalid register for .seh_savexmm
> >>>
> >>> Fixes: 5c38c33f7880 ("net/i40e: disable AVX512 with MinGW")
> >>>
> >>> Signed-off-by: Leyi Rong <leyi.rong@intel.com>
> >>
> >> Tested-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> >>
> >> Re: -fno-asynchronous-unwind-tables, when cross-compiling from Linux, I
> >> observe bit-to-bit identical i40e_rxtx_vec_avx512.c.obj. My guess it that this
> >> option somehow affects GCC inlining heuristics. Similar issue existed in
> >> librte_acl (at least a year ago win GCC 6, I believe), where GCC generated
> >> incorrect code unless certain functions had been inlined (caught by test app).
> >> No an AVX expert, just my 2c.
> >
> > Applied to dpdk-next-net-intel.
> >
>
> Hi Thomas, David,
>
> Do you prefer to get this directly to the main repo, since it is fixing the
> windows build?
Given it will be pulled shortly, I think it's OK through next-net.