x86-64: support {sae} and {er} AVX-512 operands
x86-64: support {sae} and {er} AVX-512 operands

lemire/PeachPy,adamzhz/PeachPy,silky/PeachPy,utensil-star/PeachPy,pombredanne/PeachPy,shaunstanislaus/PeachPy