private static byte floatNeg(OPT_Instruction s) {
private static DefUseEffect floatNeg(OPT_Instruction s) {
  private static byte floatNeg(OPT_Instruction s) {   if (CF_FLOAT) {      OPT_Operand op = Unary.getVal(s);      if (op.isFloatConstant()) {        // CONSTANT: FOLD        float val = op.asFloatConstant().value;        Move.mutate(s, FLOAT_MOVE, Unary.getClearResult(s), FC(-val));        return MOVE_FOLDED;      }    }    return UNCHANGED;  }