Aside from defining itself as a platform for gcc, there are no details disclosed for Skylake that I can find anywhere. It's treated almost exactly like Haswell by gcc, except for AVX512 support.
This probably means Skylake is just Haswell with larger buffers and a wider FPU. It may well have only the same capabilities as Haswell (In regards to concurrent execution / ILP extraction).
Edited by looncraz - 2/9/16 at 1:48pm