Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

matrix operation

how can 4*4 matrix is created?

how can we get 4*4 matrix from 4 row matrix?

how can particular column elements selected from 4*4 matrix?

How inverse matrix calculated by using LU decomposition for 4*4 matrix?

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    Can you go into any more details? have you got code you've started already?

    All of this is possible with VHDL..
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    as a part of my project on Hill Cipher algorithm .

    Actually i want take 4-bit binary vector as input. by taking four such vector create a 4*4 matrix from it,then select elements from column and multiply with another 4*4 binary matrix.

    thanks a lot!!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    use an array and write a function. E.g. 

    type t_matrix is array (0 to 3) of bit_vector(0 to 3);
signal s_matrix : t_matrix := (others => (others => '0'));

    function pivot_matrix(input_matrix : t_matrix) return t_matrix is
    variable output_matrix : t_matrix;
begin
    
    return output_matrix;
end function;