DSP Builder for Intel® FPGAs (Advanced Blockset): Handbook

ID 683337
Date 6/20/2022

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15.4.59. XNOR Gate (Xnor)

The Xnor block outputs the logical XNOR of the input values:

q = ~(a XOR b)

Set the number of inputs to 1, to output the logical XNOR of all the individual bits of the input word.

Table 256.  Parameters for the Xnor Block
Parameter Description
Number of inputs Specifies the number of inputs.
Output data type mode Determines how the block sets its output data type:
  • Inherit via internal rule: the number of integer and fractional bits is the maximum of the number of bits in the input data types.
  • Specify via dialog: you can set the output type of the block explicitly using additional fields that are available when this option is selected. This option reinterprets the output bit pattern from the LSB up according to the specified type.
  • Boolean: the output type is Boolean.
Output data type Specifies the output data type. For example, sfix(16), uint(8).
Output scaling value Specifies the output scaling value. For example, 2^-15.


Table 257.  Port Interface for the Xnor Block
Signal Direction Type Description Vector Data Support Complex Data Support
a Input Any fixed-point type Operand 1 Yes No
b Input Any fixed-point type Operand 2 Yes No
q Output Derived fixed-point type Result Yes No

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