急！！！关于linux的...vector函数

for (i = 0; i < width - 31; i+= 32) {
            const unsigned int j = i >> 1;
            vector unsigned char v_yA = vec_ld(i, ysrc);
            vector unsigned char v_yB = vec_ld(i + 16, ysrc);
            vector unsigned char v_yC = vec_ld(i + 32, ysrc);
            vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
            vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
            vector unsigned char v_uA = vec_ld(j, usrc);
            vector unsigned char v_uB = vec_ld(j + 16, usrc);
            vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
            vector unsigned char v_vA = vec_ld(j, vsrc);
            vector unsigned char v_vB = vec_ld(j + 16, vsrc);
            vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
            vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
            vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
          &nb