GSC_OUTFLAG_MSG_PENDING
if (msg_out->header.flags & GSC_OUTFLAG_MSG_PENDING) {
if (header_out->flags & GSC_OUTFLAG_MSG_PENDING) {
if (header->flags & GSC_OUTFLAG_MSG_PENDING) {
if (mtl_gsc_header_rd(xe, out, offset_out, flags) & GSC_OUTFLAG_MSG_PENDING) {