public static Vector256 <byte> vperm2f128(YMM a, YMM b, Perm2x128 control) => Permute2x128(vload <byte>(ref a), vload <byte>(ref b), (byte)control);
public static YMM vperm2i128(YMM a, YMM b, Perm2x128 control) => YMM.From(vperm2i128(a, b, (byte)control));