Subversion Repositories raytrac

-- RAYTRAC
-- Author Julian Andres Guarin
-- opcoder.vhd
-- This file is part of raytrac.
-- 
--     raytrac 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.
-- 
--     raytrac 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 raytrac.  If not, see <http://www.gnu.org/licenses/>.
library ieee;
use ieee.std_logic_1164.all;
 
entity opcoder is 
	port (
		Ax,Bx,Cx,Dx,Ay,By,Cy,Dy,Az,Bz,Cz,Dz : in std_logic_vector (17 downto 0);
		m0f0,m0f1,m1f0,m1f1,m2f0,m2f1,m3f0,m3f1,m4f0,m4f1,m5f0,m5f1 : out std_logic_vector (17 downto 0);
 
		opcode,addcode : in std_logic
	);
end entity;
 
architecture opcoder_arch of opcoder is 
 
 
begin
 
	procOpcoder:
	process (Ax,Bx,Cx,Dx,Ay,By,Cy,Dy,Az,Bz,Cz,Dz,opcode,addcode)
		variable scoder : std_logic_vector (1 downto 0);
	begin 
		scoder := opcode & addcode;
		case (scoder) is
			when "10" =>
				m0f0 <= Ay;
				m0f1 <= Bz;
				m1f0 <= Az;
				m1f1 <= By;
				m2f0 <= Az;
				m2f1 <= Bx;
				m3f0 <= Ax;
				m3f1 <= Bz;
				m4f0 <= Ax;
				m4f1 <= By;
				m5f0 <= Ay;
				m5f1 <= Bx;
			when "11" =>
				m0f0 <= Cy;
				m0f1 <= Dz;
				m1f0 <= Cz;
				m1f1 <= Dy;
				m2f0 <= Cz;
				m2f1 <= Dx;
				m3f0 <= Cx;
				m3f1 <= Dz;
				m4f0 <= Cx;
				m4f1 <= Dy;
				m5f0 <= Cy;
				m5f1 <= Dx;
			when others => 
				m0f0 <= Ax;
				m0f1 <= Bx;
				m1f0 <= Ay;
				m1f1 <= By;
				m2f0 <= Az;
				m2f1 <= Bz;
				m3f0 <= Cx;
				m3f1 <= Dx;
				m4f0 <= Cy;
				m4f1 <= Dy;
				m5f0 <= Cz;
				m5f1 <= Dz;
 
		end case;
 
 
 
 
 
	end process procOpcoder;
 
 
end opcoder_arch;