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/*

--------------------------------------------------------------------------------

--

-- Module : functions.h

--

--------------------------------------------------------------------------------

--

-- Function:

-- - A bunch of functions for a stack processor.

--

-- Instantiates:

-- - Nothing.

--

--------------------------------------------------------------------------------

*/

        /*

        ---------------

        -- functions --

        ---------------

        */

        // returns safe ceiling value of log2(n)

        // (for vector sizing we never want less than 1)

        // examples: 

        // clog2(0 thru 2)  = 1,

        // clog2(3 & 4)     = 2,

        // clog2(5 thru 8)  = 3,

        // clog2(9 thru 16) = 4, etc.

        function integer clog2;

        input integer n;

                begin

                        clog2 = 1;

                        while ( n > 2 ) begin

                                n = ( n + 1 ) / 2;

                                clog2 = clog2 + 1;

                        end

                end

        endfunction

        // returns the max of 2 values

        function integer max_of_2;

        input integer a, b;

                begin

                        if ( a > b ) begin

                                max_of_2 = a;

                        end else begin

                                max_of_2 = b;

                        end

                end

        endfunction