W_[Sp-SIZEOF_StgUpdateFrame-WDS(1)] = StgThunk_payload(R1,1);
R1 = StgThunk_payload(R1,0);
Sp = Sp - SIZEOF_StgUpdateFrame - WDS(1);
W_[Sp-SIZEOF_StgUpdateFrame-WDS(1)] = StgThunk_payload(R1,1);
R1 = StgThunk_payload(R1,0);
Sp = Sp - SIZEOF_StgUpdateFrame - WDS(1);