Max of two signed integers

Takes two signed integers and returns the most positive of the two, or in_A if equal. For example:

max(5,5) returns 5
max(5,6) returns 6
max(6,5) returns 6
max(-6,5) returns 5
max(-6,-7) returns -6

Bring in the function at the start of the body of your module like so:

`include "max_function.vh"

Pass the function a value which, at elaboration time, is either a constant or an expression which evaluates to a constant. Then use that value as an integer for a localparam, genvar, etc...

This function is handy when you have words of different parameterized widths and you want to scale then all to the width of the largest word (see: Width Adjuster).

Since this is an included file, it must be idempotent. (defined only once globally)

`ifndef MAX_FUNCTION
`define MAX_FUNCTION

function integer max;
    input integer in_A;
    input integer in_B;
    begin
        if (in_A >= in_B) begin
            max = in_A;
        end else begin
            max = in_B;
        end
    end
endfunction

`endif

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