| Line 1... |
Line 1... |
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
--
|
--
|
-- The Arithmetic Logic Unit (ALU).
|
-- The Arithmetic Logic Unit (ALU).
|
-- It contains the ALU core plus the Accumulator and the Temp Reg.
|
-- It contains the ALU core plus the Accumulator and the Temp Reg.
|
--
|
--
|
-- $Id: alu.vhd,v 1.4 2004-04-06 18:10:41 arniml Exp $
|
-- $Id: alu.vhd,v 1.5 2004-04-06 20:21:53 arniml Exp $
|
--
|
--
|
-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
|
-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
|
--
|
--
|
-- All rights reserved
|
-- All rights reserved
|
--
|
--
|
| Line 188... |
Line 188... |
-- All operations defined in alu_op_t are handled here.
|
-- All operations defined in alu_op_t are handled here.
|
--
|
--
|
alu_core: process (in_a_s,
|
alu_core: process (in_a_s,
|
in_b_s,
|
in_b_s,
|
alu_op_i,
|
alu_op_i,
|
|
carry_i,
|
|
use_carry_i,
|
add_result_s)
|
add_result_s)
|
|
|
begin
|
begin
|
-- default assigments
|
-- default assigments
|
data_s <= (others => '0');
|
data_s <= (others => '0');
|
| Line 417... |
Line 419... |
|
|
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
-- File History:
|
-- File History:
|
--
|
--
|
-- $Log: not supported by cvs2svn $
|
-- $Log: not supported by cvs2svn $
|
|
-- Revision 1.4 2004/04/06 18:10:41 arniml
|
|
-- rework adder and force resource sharing between ADD, INC and DEC
|
|
--
|
-- Revision 1.3 2004/04/04 14:18:52 arniml
|
-- Revision 1.3 2004/04/04 14:18:52 arniml
|
-- add measures to implement XCHD
|
-- add measures to implement XCHD
|
--
|
--
|
-- Revision 1.2 2004/03/28 21:08:51 arniml
|
-- Revision 1.2 2004/03/28 21:08:51 arniml
|
-- support for DA instruction
|
-- support for DA instruction
|
