Xilinx V2.1 - Manual (Page 88)

88 Xilinx Development System
Xilinx System Generator v2.1 Reference Guide
Mult
The Xilinx Mult block implements a multiplier. It computes the
product of the data on its two input ports, producing the result on its
output port. The block supports a size-performance tradeoff in its
implementation. It can be implemented either as a parallel multiplier
that operates on the full width data (faster and larger), or as a
sequential multiplier that computes the result from smaller partial
products (slower and smaller). Note that this choice affects the
hardware implementation only. The simulation behavior of the block is not affected.
Block Parameters Dialog Box
The block parameters dialog box can be invoked by double-clicking the icon in your
Simulink model.
Figure 3-59: Mult block parameters dialog box - parallel type