EMIT(MIR_Move.mutate(s, PPC_MOVE, L(defHigh), left)); EMIT(MIR_Unary.create(PPC64_EXTSW, L(defHigh), L(defHigh)));
  protected final void INT_2LONG(OPT_Instruction s,                                  OPT_RegisterOperand def,                                  OPT_RegisterOperand left) {    OPT_Register defHigh = def.register;    OPT_Register defLow = regpool.getSecondReg(defHigh);    EMIT(MIR_Move.mutate(s, PPC_MOVE, R(defLow), left));    EMIT(MIR_Binary.create(PPC_SRAWI, R(defHigh), left.copyU2U(), I(31)));  }