In a modification of the preceding technique, a binary value corresponding to 0.499... is added to the accumulator result and the m LSBs are removed; this is equivalent to the MATLAB software function ceil(x-0.5). The resource usage advantage is the same, but the bias in this case is towards the negative by 2-(m+1).
Figure 1. Non-symmetric Rounding (a) to Positive (b) to Negative
