An example of MAC with pre-adding is as follows. With pre-adding, the data
from X buffer can be added by itself, or the data
from X buffer and Y buffer can be added. The start,
offsets, and step parameters work similar as previous example. There is a ystart parameter for Y
buffer or another data from X buffer. The step parameter works reversely for Y or another data from X buffer.
Figure 1. LMAC8_SYM on int32 x int16 Type
