Verilog Code for Parity Calculation(function)

Parity Calculation(function):

This function calculates parity of 32-bit address and returns the value. In 1st invocation of calc_parity, the returned value was used to set the reg parity. In the 2nd invocation, the value returned was directly used inside $display task. Thus, the returned values is placed wherever the function was invoked. 

Verilog Code for Parity Calculation(function):

//define module containing func cal_parity 

module parity(addr,parity); 

input[31:0] addr; 

output reg parity;  

//compute newparity whenever address value changes 

always@(addr) 

begin 

parity= calc_parity(addr); //first invocation of calc_parity 

$display("parity calculated=%b",calc_parity(addr));  

//second invocation of calc_parity 

end   

//define the parity calc func 

function calc_parity; 

input [31:0]address; 

begin  

//set the o/p value  

calc_parity=^address;  //return the xor of all address bits. 

$display("address=%d",address); 

end  

endfunction  

endmodule  

OUTPUT: