emitLAddr ( 0,  VM_Entrypoints.activeThreadStackLimitField.getOffset(), PROCESSOR_REGISTER);
emitLAddr ( 0,  VM_Entrypoints.activeThreadStackLimitField.getOffsetAsInt(), PROCESSOR_REGISTER);
  public void emitStackOverflowCheck (int frameSize) {    emitLAddr ( 0,  VM_Entrypoints.activeThreadStackLimitField.getOffset(), PROCESSOR_REGISTER);   // R0 := &stack guard page    emitADDI(S0, -frameSize, FP);                        // S0 := &new frame    emitTAddrLT (S0,  0);                                    // trap if new frame below guard page  }