Subversion Repositories astron_adder

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

--

-- Copyright (C) 2009

-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>

-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands

--

-- This program is free software: you can redistribute it and/or modify

-- it under the terms of the GNU General Public License as published by

-- the Free Software Foundation, either version 3 of the License, or

-- (at your option) any later version.

--

-- This program is distributed in the hope that it will be useful,

-- but WITHOUT ANY WARRANTY; without even the implied warranty of

-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-- GNU General Public License for more details.

--

-- You should have received a copy of the GNU General Public License

-- along with this program.  If not, see <http://www.gnu.org/licenses/>.

--

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

LIBRARY IEEE, common_pkg_lib;

USE IEEE.std_logic_1164.ALL;

USE common_pkg_lib.common_pkg.ALL;

ENTITY tb_tb_common_adder_tree IS

END tb_tb_common_adder_tree;

ARCHITECTURE tb OF tb_tb_common_adder_tree IS

  SIGNAL tb_end : STD_LOGIC := '0';  -- declare tb_end to avoid 'No objects found' error on 'when -label tb_end'

BEGIN

  -- Usage:

  -- > as 4

  -- > run -all

  -- g_representation : STRING  := "SIGNED";

  -- g_pipeline       : NATURAL := 1;  -- amount of pipelining per stage

  -- g_nof_inputs     : NATURAL := 1;  -- >= 1

  -- g_symbol_w       : NATURAL := 8;

  -- g_sum_w          : NATURAL := 8  -- worst case bit growth requires g_symbol_w + c_nof_stages;

  gen_nof_inputs : FOR I IN 1 TO 31 GENERATE

    -- SIGNED

    s_pipe_0  : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 0, I, 8, 8+ceil_log2(I));

    s_pipe_1  : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 1, I, 8, 8+ceil_log2(I));

    s_pipe_2  : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 2, I, 8, 8+ceil_log2(I));

    s_sum_w_0      : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 1, I, 8, 8);

    s_sum_w_plus_1 : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 1, I, 8, 8+1);

    s_sum_w_min_1  : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 1, I, 8, 8-1);

    s_sum_w_wider  : ENTITY work.tb_common_adder_tree GENERIC MAP ("SIGNED", 1, I, 8, 8+8);

    -- UNSIGNED

    u_pipe_0  : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 0, I, 8, 8+ceil_log2(I));

    u_pipe_1  : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 1, I, 8, 8+ceil_log2(I));

    u_pipe_2  : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 2, I, 8, 8+ceil_log2(I));

    u_sum_w_0      : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 1, I, 8, 8);

    u_sum_w_plus_1 : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 1, I, 8, 8+1);

    u_sum_w_min_1  : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 1, I, 8, 8-1);

    u_sum_w_wider  : ENTITY work.tb_common_adder_tree GENERIC MAP ("UNSIGNED", 1, I, 8, 8+8);

  END GENERATE;

END tb;