Rounding mode

Specifies the rounding mode to be used for decimal floating point operations. If the rounding mode is not applicable, then this field is not displayed.

Possible values are:

Ceiling
Round toward +infinity. If all of the discarded digits are zero or if the sign is negative the result is unchanged other than the removal of the discarded digits. Otherwise, the result coefficient is incremented by one (rounded up).

Down
Round toward zero (truncation). The discarded digits are ignored.

Floor
Round toward -infinity. If all of the discarded digits are zero or if the sign is positive, the result is unchanged other than the removal of the discarded digits. Otherwise, the sign is negative and the result coefficient is incremented by one.

Half down
Round to nearest; if equidistant, round down. If the discarded digits represent greater than half (0.5) of the value of a one in the next left position, then the result coefficient is incremented by one (rounded up). Otherwise, the discarded digits are ignored.

Half even
Round to nearest; if equidistant, round so that the final digit is even. If the discarded digits represent greater than half (0.5) of the value of a one in the next left position, then the result coefficient is incremented by one (rounded up). If they represent less than half, then the result coefficient is not adjusted (that is, the discarded digits are ignored). Otherwise (they represent exactly half), the result coefficient is unaltered if its rightmost digit is even or incremented by one (rounded up) if its rightmost digit is odd (to make an even digit).

Half up
Round to nearest; if equidistant, round up. If the discarded digits represent greater than or equal to half (0.5) of the value of a one in the next left position, then the result coefficient is incremented by one (rounded up). Otherwise, the discarded digits are ignored.

Up
Round away from zero. If all of the discarded digits are zero, the result is unchanged other than the removal of discarded digits. Otherwise, the result coefficient is incremented by one (rounded up).