unpack1_epi32
z4 = unpack1_epi32(y0, y1, y2, y3);
z5 = unpack1_epi32(y4, y5, y6, y7);
z6 = unpack1_epi32(y8, y9, y10, y11);
z7 = unpack1_epi32(y12, y13, y14, y15);
z4 = unpack1_epi32(y0, y1, y2, y3);
z5 = unpack1_epi32(y4, y5, y6, y7);
z6 = unpack1_epi32(y8, y9, y10, y11);
z7 = unpack1_epi32(y12, y13, y14, y15);