Xilinx System Generator V2.1 Reference Manual page 91

The output of the block is a 1-bit unsigned number. It is 1 if the comparison is true and
0 if false.
Block Parameters Dialog Box
The block parameters dialog box can be invoked by double-clicking the icon in your
Simulink model.
Figure 3-62: Relational block parameters dialog box
The only parameter specific to the Relational block is:
Other parameters used by this block are explained in the Common Parameters section
of the previous chapter.
Xilinx LogiCORE
The block uses the Xilinx LogiCORE: Comparator V5.0 if the Implement with
Xilinx Smart-IP Core checkbox is selected and the output widths to the block
are between 1 and 64, inclusive. Otherwise, the block is implemented as a
synthesizable VHDL module.
The Core datasheet can be found on your local disk at:
%XILINX%\coregen\ip\xilinx\eip1\com\xilinx\ip\baseblox_v5_0\do
c\compare.pdf
Math
equal-to (a = b)
not-equal-to (a != b)
less-than (a < b)
greater-than (a > b)
less-than-or-equal-to (a <= b)
greater-than-or-equal-to (a >= b)
Comparison Operation: specifies the comparison operation computed by the
block.
Xilinx Blocks
91