http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59952
--- Comment #4 from Thiago Macieira <thiago at kde dot org> --- (In reply to Mikael Pettersson from comment #3) > There are also Haswells that lack BMI2. I updated our dynamic binary > instrumentation engine for AVX2 about a year ago, but while our Haswell box > at the time had AVX2 it didn't have BMI2 etc, causing Intel's MKL to refuse > to enter it AVX2 code paths. So testing had to be limited to small > assembly-coded kernels. Are you sure? Unfortunately, ark.intel.com does not list BMI instruction level.
