tws_sg_desc64
sgl_s = (struct tws_sg_desc64 *) (((u_int8_t *)sgl_s) +
struct tws_sg_desc64 *sgl_s = (struct tws_sg_desc64 *)sgl_src;
struct tws_sg_desc64 *sgl_d = (struct tws_sg_desc64 *)sgl_dest;
sgl_s = (struct tws_sg_desc64 *) (((u_int8_t *)sgl_s) +