/
word.vhd
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word.vhd
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-----------------------------------------------------------------------------------
--! @file word.vhd
--! @brief Merge Sorter Word Package :
--! @version 0.9.1
--! @date 2020/11/19
--! @author Ichiro Kawazome <ichiro_k@ca2.so-net.ne.jp>
-----------------------------------------------------------------------------------
--
-- Copyright (C) 2018-2020 Ichiro Kawazome
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- 1. Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- 2. Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
-----------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package Word is
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
constant ATRB_NONE_POS : integer := 0;
constant ATRB_PRIORITY_POS : integer := 1;
constant ATRB_POSTPEND_POS : integer := 2;
constant ATRB_BITS : integer := 3;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
type Param_Type is record
BITS : integer;
DATA_BITS : integer;
DATA_LO : integer;
DATA_HI : integer;
DATA_COMPARE_LO : integer;
DATA_COMPARE_HI : integer;
DATA_COMPARE_SIGN : boolean;
ATRB_BITS : integer;
ATRB_LO : integer;
ATRB_HI : integer;
ATRB_NONE_POS : integer;
ATRB_PRIORITY_POS : integer;
ATRB_POSTPEND_POS : integer;
end record;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Param(
DATA_BITS : integer;
COMP_LO : integer;
COMP_HI : integer;
SIGN : boolean
) return Param_Type;
function New_Param(
DATA_BITS : integer;
COMP_LO : integer;
COMP_HI : integer
) return Param_Type;
function New_Param(
DATA_BITS : integer;
SIGN : boolean
) return Param_Type;
function New_Param(
DATA_BITS : integer
) return Param_Type;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
constant Default_Param : Param_Type := New_Param(DATA_BITS => 8,SIGN => FALSE);
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Word(
PARAM : Param_Type;
DATA : std_logic_vector;
PRIORITY : std_logic;
POSTPEND : std_logic;
NONE : std_logic
) return std_logic_vector;
function New_Word(
PARAM : Param_Type;
DATA : std_logic_vector
) return std_logic_vector;
function New_Postpend_Word(
PARAM : Param_Type;
DATA : std_logic_vector := "0";
NONE : std_logic := '1'
) return std_logic_vector;
function New_Priority_Word(
PARAM : Param_Type;
DATA : std_logic_vector := "0";
NONE : std_logic := '1'
) return std_logic_vector;
end Word;
-----------------------------------------------------------------------------------
--
-----------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package body Word is
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Param(
DATA_BITS : integer;
COMP_LO : integer;
COMP_HI : integer;
SIGN : boolean
) return Param_Type
is
variable pos : integer;
variable param : Param_Type;
begin
pos := 0;
param.DATA_BITS := DATA_BITS;
param.DATA_LO := pos;
param.DATA_HI := pos + DATA_BITS-1;
param.DATA_COMPARE_LO := COMP_LO;
param.DATA_COMPARE_HI := COMP_HI;
param.DATA_COMPARE_SIGN := SIGN;
pos := pos + DATA_BITS;
param.ATRB_BITS := ATRB_BITS;
param.ATRB_LO := pos;
param.ATRB_HI := pos + ATRB_BITS-1;
param.ATRB_NONE_POS := pos + ATRB_NONE_POS;
param.ATRB_PRIORITY_POS := pos + ATRB_PRIORITY_POS;
param.ATRB_POSTPEND_POS := pos + ATRB_POSTPEND_POS;
pos := pos + ATRB_BITS;
param.BITS := pos;
return param;
end New_Param;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Param(
DATA_BITS : integer;
COMP_LO : integer;
COMP_HI : integer
) return Param_Type
is
begin
return New_Param(
DATA_BITS => DATA_BITS ,
COMP_LO => COMP_LO ,
COMP_HI => COMP_HI ,
SIGN => FALSE
);
end New_Param;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Param(
DATA_BITS : integer;
SIGN : boolean
) return Param_Type
is
begin
return New_Param(
DATA_BITS => DATA_BITS ,
COMP_LO => 0 ,
COMP_HI => DATA_BITS-1,
SIGN => SIGN
);
end New_Param;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Param(
DATA_BITS : integer
) return Param_Type
is
begin
return New_Param(
DATA_BITS => DATA_BITS ,
COMP_LO => 0 ,
COMP_HI => DATA_BITS-1,
SIGN => FALSE
);
end New_Param;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function resize(I: std_logic_vector;LEN: integer) return std_logic_vector
is
begin
return std_logic_vector(resize(unsigned(I), LEN));
end function;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Word(
PARAM : Param_Type;
DATA : std_logic_vector;
PRIORITY : std_logic;
POSTPEND : std_logic;
NONE : std_logic
) return std_logic_vector
is
variable a_word : std_logic_vector(PARAM.BITS-1 downto 0);
begin
a_word := (others => '0');
a_word(PARAM.DATA_HI downto PARAM.DATA_LO) := DATA;
a_word(PARAM.ATRB_NONE_POS ) := NONE;
a_word(PARAM.ATRB_PRIORITY_POS) := PRIORITY;
a_word(PARAM.ATRB_POSTPEND_POS) := POSTPEND;
return a_word;
end function;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Word(
PARAM : Param_Type;
DATA : std_logic_vector
) return std_logic_vector
is
begin
return New_Word(PARAM => PARAM,
DATA => DATA ,
PRIORITY => '0' ,
POSTPEND => '0' ,
NONE => '0'
);
end function;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Postpend_Word(
PARAM : Param_Type;
DATA : std_logic_vector := "0";
NONE : std_logic := '1'
) return std_logic_vector
is
begin
return New_Word(PARAM => PARAM ,
DATA => resize(DATA,PARAM.DATA_BITS),
PRIORITY => '0' ,
POSTPEND => '1' ,
NONE => NONE
);
end function;
-------------------------------------------------------------------------------
--
-------------------------------------------------------------------------------
function New_Priority_Word(
PARAM : Param_Type;
DATA : std_logic_vector := "0";
NONE : std_logic := '1'
) return std_logic_vector
is
begin
return New_Word(PARAM => PARAM ,
DATA => resize(DATA,PARAM.DATA_BITS),
PRIORITY => '1' ,
POSTPEND => '0' ,
NONE => NONE
);
end function;
end Word;