EMIT(MIR_Unary.create(PPC64_EXTSW, def, left));
EMIT(MIR_Unary.create(PPC_MOVE, def, left));
  protected final void LONG_2INT(OPT_Instruction s,                                  OPT_RegisterOperand def,                                  OPT_RegisterOperand left) {    OPT_Register srcHigh = left.register;    //-#if RVM_FOR_32_ADDR    OPT_Register srcLow = regpool.getSecondReg(srcHigh);    EMIT(MIR_Move.mutate(s, PPC_MOVE, def, I(srcLow)));    //-#endif    //-#if RVM_FOR_64_ADDR    EMIT(MIR_Unary.create(PPC64_EXTSW, def, left)); //sign extend to prevent highest bits to be faulty    //-#endif  }