EMIT(MIR_Binary.create(PPC_SUBFIC, L(regpool.getSecondReg(defReg)), L(regpool.getSecondReg(leftReg)), I(0)));
  protected final void LONG_NEG(OPT_Instruction s,                                 OPT_RegisterOperand def,                                 OPT_RegisterOperand left) {    OPT_Register defReg = def.register;    OPT_Register leftReg = left.register;    EMIT(MIR_Binary.create(PPC_SUBFIC,                            R(regpool.getSecondReg(defReg)),                            R(regpool.getSecondReg(leftReg)),                            I(0)));    EMIT(MIR_Unary.create(PPC_SUBFZE, R(defReg), R(leftReg)));  }