Hi Florian What HW are you ussing ? As far as I knwo the avx512 might not be supported I have use this : https://github.com/VictorRodriguez/Presentations/blob/master/GCC5/GCC5.pdf Hope it helps Regards Victor Rodriguez On Tue, Mar 1, 2016 at 9:02 AM, Florian Weimer <fw@xxxxxxxxxxxxx> wrote: > What's the correct way to use AVX and AVX512 selectively? > > Specifying -mavx512f (for example) on the command line causes GCC 6 to > use such instructions during regular code generation, even without any > AVX512F instructions in the code. > > According to the documentation, the target function attribute does not > support "avx512f". > > Are there other options besides separate compilation?
