On Wed, Jul 22, 2020 at 10:20:48AM +0000, Fady Bader wrote: > > > > -----Original Message----- > > From: Dmitry Kozlyuk <dmitry.kozl...@gmail.com> > > Sent: Monday, July 20, 2020 7:27 PM > > To: Fady Bader <f...@mellanox.com> > > Cc: Narcisa Ana Maria Vasile <navas...@linux.microsoft.com>; dev@dpdk.org; > > Thomas Monjalon <tho...@monjalon.net>; Tasnim Bashar > > <tbas...@mellanox.com>; Tal Shnaiderman <tal...@mellanox.com>; Yohad Tor > > <yoh...@mellanox.com>; harini.ramakrish...@microsoft.com; > > ocard...@microsoft.com; anand.ra...@intel.com; ranjit.me...@intel.com; > > olivier.m...@6wind.com > > Subject: Re: [dpdk-dev] [PATCH v2 3/3] eal/windows: librte_net build on > > Windows > > > > On Mon, 20 Jul 2020 12:54:08 +0000, Fady Bader wrote: > > [snip] > > > > Getting the same error with a setup similar to Dmitry's. My setup: > > > > SDK 10.0.18362, > > > > > > I'm sending v4 patch that should resolve this. > > > > > > > clang 9.0.0. What version of clang are you using on your system? > > > > You can try installing LLVM 9.0.0 from > > > > https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fre > > > > leases.ll > > > > > > vm.org%2Fdownload.html&data=02%7C01%7Cfady%40mellanox.com%7C0b > > > > > > 29fed755494b55361d08d82a9ff2b4%7Ca652971c7d2e4d9ba6a4d149256f461b%7C > > > > 0 > > > > > > %7C0%7C637306213753996879&sdata=5lPQtvt8EO7q8OAYN60J8rIdYdNJHjsS > > > > Pp%2B6P9PL3N0%3D&reserved=0 > > > > > > Thanks for the link, even with clang and SDK version same as yours and > > > Dmitry's I'm still passing compilation and not getting the error > > > described. > > > That's because the _m_prefetchw function that is defined in Clang's > > > prfchwintrin.h is an intrinsic function corresponding to the > > > instruction PREFETCHW that is part of the instruction set extension > > > 3DNOW, my processor doesn't support this instruction set extension, so my > > compiler isn't reaching the part where it defines _m_prefetchw. > > > I think your processor does support the 3DNOW instruction set > > > extension and that why you are reaching this part and I'm not. > > > > You can try building DPDK for a machine with RDSEED like so: > > > > meson -Dmachine=broadwell -Dexamples=helloworld build > > Even with this option I still don't get the error. With this option RDSEED is > enabled > but the reason I'm not getting the error is that 3DNOW is not supported by my > machine and its disabled. > Do you know of such way that I can enable instruction set extenuations for > the > project compilation? > The prefetchw should be available for broadwell and later machine types, even without 3dnow - which AFAIK is unsupported by all modern x86 processors. I am using a machine of type "skylake-avx512" (using the compiler name for it!), and proc/cpuinfo shows "3dnowprefetch" in the supported CPU flags.
Regards, /Bruce