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`ifdef PARITY

`define MODULE parity_generate

module `BASE`MODULE (data, parity);

`undef MODULE

parameter word_size = 32;

parameter chunk_size = 8;

parameter parity_type = 1'b0; // 0 - even, 1 - odd parity

input [word_size-1:0] data;

output reg [word_size/chunk_size-1:0] parity;

integer i,j;

always @ (data)

for (i=0;i<word_size/chunk_size;i=i+1) begin

    parity[i] = parity_type;

    for (j=0;j<chunk_size;j=j+1) begin

        parity[i] = data[i+j] ^ parity[i];

    end

end

endmodule

`define MODULE parity_check

module `BASE`MODULE( data, parity, parity_error);

`undef MODULE

parameter word_size = 32;

parameter chunk_size = 8;

parameter parity_type = 1'b0; // 0 - even, 1 - odd parity

input [word_size-1:0] data;

input [word_size/chunk_size-1:0] parity;

output parity_error;

reg [chunk_size-1:0] error_flag;

integer i,j;

always @ (data or parity)

for (i=0;i<word_size/chunk_size;i=i+1) begin

    error_flag[i] = parity[i] ^ parity_type;

    for (j=0;j<chunk_size;j=j+1) begin

        error_flag[i] = data[i+j] ^ error_flag[i];

    end

end

assign parity_error = |error_flag;

endmodule

`endif