  Value          Ceiling          Floor     ToZero   

    3.5                4              3              3              3
    2.8                3              2              2              2
    2.5                3              2              2              2
    2.1                3              2              2              2
   -2.1               -2             -3             -2             -2
   -2.5               -2             -3             -2             -2
   -2.8               -2             -3             -2             -2
   -3.5               -3             -4             -3             -3
