On 2/4/2021 10:41 AM, Zhang, Qi Z wrote:
-----Original Message-----
From: Dmitry Kozlyuk <[email protected]>
Sent: Wednesday, February 3, 2021 7:08 AM
To: Rong, Leyi <[email protected]>
Cc: [email protected]; Zhang, Qi Z <[email protected]>; Yigit,
Ferruh <[email protected]>; [email protected]; Richardson, Bruce
<[email protected]>; [email protected]; Kadam, Pallavi
<[email protected]>; Menon, Ranjit <[email protected]>; Xing,
Beilei <[email protected]>; [email protected]; [email protected];
[email protected]
Subject: Re: [dpdk-dev] [PATCH v2] net/i40e: fix avx code error on MinGW
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 <[email protected]>
Tested-by: Dmitry Kozlyuk <[email protected]>
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?
