--------------------------------------------------------------------------
--
-- Copyright (c) 1990, 1991, 1992 by Synopsys, Inc. All rights reserved.
--
-- This source file may be used and distributed without restriction
-- provided that this copyright statement is not removed from the file
-- and that any derivative work contains this copyright notice.
--
-- Package name: std_logic_misc
--
-- Purpose: This package defines supplemental types, subtypes,
-- constants, and functions for the Std_logic_1164 Package.
--
-- Author: GWH
--
--------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.all;
library SYNOPSYS;
use SYNOPSYS.attributes.all;
package std_logic_misc is
-- output-strength types
type STRENGTH is (strn_X01, strn_X0H, strn_XL1, strn_X0Z, strn_XZ1,
strn_WLH, strn_WLZ, strn_WZH, strn_W0H, strn_WL1);
--synopsys synthesis_off
type MINOMAX is array (1 to 3) of TIME;
---------------------------------------------------------------------
--
-- functions for mapping the STD_(U)LOGIC according to STRENGTH
--
---------------------------------------------------------------------
function strength_map(input: STD_ULOGIC; strn: STRENGTH) return STD_LOGIC;
function strength_map_z(input:STD_ULOGIC; strn:STRENGTH) return STD_LOGIC;
---------------------------------------------------------------------
--
-- conversion functions for STD_ULOGIC_VECTOR and STD_LOGIC_VECTOR
--
---------------------------------------------------------------------
--synopsys synthesis_on
function Drive (V: STD_ULOGIC_VECTOR) return STD_LOGIC_VECTOR;
function Drive (V: STD_LOGIC_VECTOR) return STD_ULOGIC_VECTOR;
--synopsys synthesis_off
attribute CLOSELY_RELATED_TCF of Drive: function is TRUE;
---------------------------------------------------------------------
--
-- conversion functions for sensing various types
-- (the second argument allows the user to specify the value to
-- be returned when the network is undriven)
--
---------------------------------------------------------------------
function Sense (V: STD_ULOGIC; vZ, vU, vDC: STD_ULOGIC) return STD_LOGIC;
function Sense (V: STD_ULOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_LOGIC_VECTOR;
function Sense (V: STD_ULOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_ULOGIC_VECTOR;
function Sense (V: STD_LOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_LOGIC_VECTOR;
function Sense (V: STD_LOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_ULOGIC_VECTOR;
--synopsys synthesis_on
---------------------------------------------------------------------
--
-- Function: STD_LOGIC_VECTORtoBIT_VECTOR STD_ULOGIC_VECTORtoBIT_VECTOR
--
-- Purpose: Conversion fun. from STD_(U)LOGIC_VECTOR to BIT_VECTOR
--
-- Mapping: 0, L --> 0
-- 1, H --> 1
-- X, W --> vX if Xflag is TRUE
-- X, W --> 0 if Xflag is FALSE
-- Z --> vZ if Zflag is TRUE
-- Z --> 0 if Zflag is FALSE
-- U --> vU if Uflag is TRUE
-- U --> 0 if Uflag is FALSE
-- - --> vDC if DCflag is TRUE
-- - --> 0 if DCflag is FALSE
--
---------------------------------------------------------------------
function STD_LOGIC_VECTORtoBIT_VECTOR (V: STD_LOGIC_VECTOR
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT_VECTOR;
function STD_ULOGIC_VECTORtoBIT_VECTOR (V: STD_ULOGIC_VECTOR
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT_VECTOR;
---------------------------------------------------------------------
--
-- Function: STD_ULOGICtoBIT
--
-- Purpose: Conversion function from STD_(U)LOGIC to BIT
--
-- Mapping: 0, L --> 0
-- 1, H --> 1
-- X, W --> vX if Xflag is TRUE
-- X, W --> 0 if Xflag is FALSE
-- Z --> vZ if Zflag is TRUE
-- Z --> 0 if Zflag is FALSE
-- U --> vU if Uflag is TRUE
-- U --> 0 if Uflag is FALSE
-- - --> vDC if DCflag is TRUE
-- - --> 0 if DCflag is FALSE
--
---------------------------------------------------------------------
function STD_ULOGICtoBIT (V: STD_ULOGIC
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT;
--------------------------------------------------------------------
function AND_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function NAND_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function OR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function NOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function XOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function XNOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01;
function AND_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
function NAND_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
function OR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
function NOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
function XOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
function XNOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01;
--synopsys synthesis_off
function fun_BUF3S(Input, Enable: UX01; Strn: STRENGTH) return STD_LOGIC;
function fun_BUF3SL(Input, Enable: UX01; Strn: STRENGTH) return STD_LOGIC;
function fun_MUX2x1(Input0, Input1, Sel: UX01) return UX01;
function fun_MAJ23(Input0, Input1, Input2: UX01) return UX01;
function fun_WiredX(Input0, Input1: std_ulogic) return STD_LOGIC;
--synopsys synthesis_on
end;
package body std_logic_misc is
--synopsys synthesis_off
type STRN_STD_ULOGIC_TABLE is array (STD_ULOGIC,STRENGTH) of STD_ULOGIC;
--------------------------------------------------------------------
--
-- Truth tables for output strength --> STD_ULOGIC lookup
--
--------------------------------------------------------------------
-- truth table for output strength --> STD_ULOGIC lookup
constant tbl_STRN_STD_ULOGIC: STRN_STD_ULOGIC_TABLE :=
-- ------------------------------------------------------------------
-- | X01 X0H XL1 X0Z XZ1 WLH WLZ WZH W0H WL1 | strn/ output|
-- ------------------------------------------------------------------
(('U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U'), -- | U |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W'), -- | X |
('0', '0', 'L', '0', 'Z', 'L', 'L', 'Z', '0', 'L'), -- | 0 |
('1', 'H', '1', 'Z', '1', 'H', 'Z', 'H', 'H', '1'), -- | 1 |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W'), -- | Z |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W'), -- | W |
('0', '0', 'L', '0', 'Z', 'L', 'L', 'Z', '0', 'L'), -- | L |
('1', 'H', '1', 'Z', '1', 'H', 'Z', 'H', 'H', '1'), -- | H |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W')); -- | - |
--------------------------------------------------------------------
--
-- Truth tables for strength --> STD_ULOGIC mapping ('Z' pass through)
--
--------------------------------------------------------------------
-- truth table for output strength --> STD_ULOGIC lookup
constant tbl_STRN_STD_ULOGIC_Z: STRN_STD_ULOGIC_TABLE :=
-- ------------------------------------------------------------------
-- | X01 X0H XL1 X0Z XZ1 WLH WLZ WZH W0H WL1 | strn/ output|
-- ------------------------------------------------------------------
(('U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U'), -- | U |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W'), -- | X |
('0', '0', 'L', '0', 'Z', 'L', 'L', 'Z', '0', 'L'), -- | 0 |
('1', 'H', '1', 'Z', '1', 'H', 'Z', 'H', 'H', '1'), -- | 1 |
('Z', 'Z', 'Z', 'Z', 'Z', 'Z', 'Z', 'Z', 'Z', 'Z'), -- | Z |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W'), -- | W |
('0', '0', 'L', '0', 'Z', 'L', 'L', 'Z', '0', 'L'), -- | L |
('1', 'H', '1', 'Z', '1', 'H', 'Z', 'H', 'H', '1'), -- | H |
('X', 'X', 'X', 'X', 'X', 'W', 'W', 'W', 'W', 'W')); -- | - |
---------------------------------------------------------------------
--
-- functions for mapping the STD_(U)LOGIC according to STRENGTH
--
---------------------------------------------------------------------
function strength_map(input: STD_ULOGIC; strn: STRENGTH) return STD_LOGIC is
-- pragma subpgm_id 387
begin
return tbl_STRN_STD_ULOGIC(input, strn);
end strength_map;
function strength_map_z(input:STD_ULOGIC; strn:STRENGTH) return STD_LOGIC is
-- pragma subpgm_id 388
begin
return tbl_STRN_STD_ULOGIC_Z(input, strn);
end strength_map_z;
---------------------------------------------------------------------
--
-- conversion functions for STD_LOGIC_VECTOR and STD_ULOGIC_VECTOR
--
---------------------------------------------------------------------
--synopsys synthesis_on
function Drive (V: STD_LOGIC_VECTOR) return STD_ULOGIC_VECTOR is
-- pragma built_in SYN_FEED_THRU
-- pragma subpgm_id 389
--synopsys synthesis_off
alias Value: STD_LOGIC_VECTOR (V'length-1 downto 0) is V;
--synopsys synthesis_on
begin
--synopsys synthesis_off
return STD_ULOGIC_VECTOR(Value);
--synopsys synthesis_on
end Drive;
function Drive (V: STD_ULOGIC_VECTOR) return STD_LOGIC_VECTOR is
-- pragma built_in SYN_FEED_THRU
-- pragma subpgm_id 390
--synopsys synthesis_off
alias Value: STD_ULOGIC_VECTOR (V'length-1 downto 0) is V;
--synopsys synthesis_on
begin
--synopsys synthesis_off
return STD_LOGIC_VECTOR(Value);
--synopsys synthesis_on
end Drive;
--synopsys synthesis_off
---------------------------------------------------------------------
--
-- conversion functions for sensing various types
--
-- (the second argument allows the user to specify the value to
-- be returned when the network is undriven)
--
---------------------------------------------------------------------
function Sense (V: STD_ULOGIC; vZ, vU, vDC: STD_ULOGIC)
return STD_LOGIC is
-- pragma subpgm_id 391
begin
if V = 'Z' then
return vZ;
elsif V = 'U' then
return vU;
elsif V = '-' then
return vDC;
else
return V;
end if;
end Sense;
function Sense (V: STD_ULOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_LOGIC_VECTOR is
-- pragma subpgm_id 392
alias Value: STD_ULOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: STD_LOGIC_VECTOR (V'length-1 downto 0);
begin
for i in Value'range loop
if ( Value(i) = 'Z' ) then
Result(i) := vZ;
elsif Value(i) = 'U' then
Result(i) := vU;
elsif Value(i) = '-' then
Result(i) := vDC;
else
Result(i) := Value(i);
end if;
end loop;
return Result;
end Sense;
function Sense (V: STD_ULOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_ULOGIC_VECTOR is
-- pragma subpgm_id 393
alias Value: STD_ULOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: STD_ULOGIC_VECTOR (V'length-1 downto 0);
begin
for i in Value'range loop
if ( Value(i) = 'Z' ) then
Result(i) := vZ;
elsif Value(i) = 'U' then
Result(i) := vU;
elsif Value(i) = '-' then
Result(i) := vDC;
else
Result(i) := Value(i);
end if;
end loop;
return Result;
end Sense;
function Sense (V: STD_LOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_LOGIC_VECTOR is
-- pragma subpgm_id 394
alias Value: STD_LOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: STD_LOGIC_VECTOR (V'length-1 downto 0);
begin
for i in Value'range loop
if ( Value(i) = 'Z' ) then
Result(i) := vZ;
elsif Value(i) = 'U' then
Result(i) := vU;
elsif Value(i) = '-' then
Result(i) := vDC;
else
Result(i) := Value(i);
end if;
end loop;
return Result;
end Sense;
function Sense (V: STD_LOGIC_VECTOR; vZ, vU, vDC: STD_ULOGIC)
return STD_ULOGIC_VECTOR is
-- pragma subpgm_id 395
alias Value: STD_LOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: STD_ULOGIC_VECTOR (V'length-1 downto 0);
begin
for i in Value'range loop
if ( Value(i) = 'Z' ) then
Result(i) := vZ;
elsif Value(i) = 'U' then
Result(i) := vU;
elsif Value(i) = '-' then
Result(i) := vDC;
else
Result(i) := Value(i);
end if;
end loop;
return Result;
end Sense;
---------------------------------------------------------------------
--
-- Function: STD_LOGIC_VECTORtoBIT_VECTOR
--
-- Purpose: Conversion fun. from STD_LOGIC_VECTOR to BIT_VECTOR
--
-- Mapping: 0, L --> 0
-- 1, H --> 1
-- X, W --> vX if Xflag is TRUE
-- X, W --> 0 if Xflag is FALSE
-- Z --> vZ if Zflag is TRUE
-- Z --> 0 if Zflag is FALSE
-- U --> vU if Uflag is TRUE
-- U --> 0 if Uflag is FALSE
-- - --> vDC if DCflag is TRUE
-- - --> 0 if DCflag is FALSE
--
---------------------------------------------------------------------
--synopsys synthesis_on
function STD_LOGIC_VECTORtoBIT_VECTOR (V: STD_LOGIC_VECTOR
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT_VECTOR is
-- pragma built_in SYN_FEED_THRU
-- pragma subpgm_id 396
--synopsys synthesis_off
alias Value: STD_LOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: BIT_VECTOR (V'length-1 downto 0);
--synopsys synthesis_on
begin
--synopsys synthesis_off
for i in Value'range loop
case Value(i) is
when '0' | 'L' =>
Result(i) := '0';
when '1' | 'H' =>
Result(i) := '1';
when 'X' =>
if ( Xflag ) then
Result(i) := vX;
else
Result(i) := '0';
assert FALSE
report "STD_LOGIC_VECTORtoBIT_VECTOR: X --> 0"
severity WARNING;
end if;
when 'W' =>
if ( Xflag ) then
Result(i) := vX;
else
Result(i) := '0';
assert FALSE
report "STD_LOGIC_VECTORtoBIT_VECTOR: W --> 0"
severity WARNING;
end if;
when 'Z' =>
if ( Zflag ) then
Result(i) := vZ;
else
Result(i) := '0';
assert FALSE
report "STD_LOGIC_VECTORtoBIT_VECTOR: Z --> 0"
severity WARNING;
end if;
when 'U' =>
if ( Uflag ) then
Result(i) := vU;
else
Result(i) := '0';
assert FALSE
report "STD_LOGIC_VECTORtoBIT_VECTOR: U --> 0"
severity WARNING;
end if;
when '-' =>
if ( DCflag ) then
Result(i) := vDC;
else
Result(i) := '0';
assert FALSE
report "STD_LOGIC_VECTORtoBIT_VECTOR: - --> 0"
severity WARNING;
end if;
end case;
end loop;
return Result;
--synopsys synthesis_on
end STD_LOGIC_VECTORtoBIT_VECTOR;
---------------------------------------------------------------------
--
-- Function: STD_ULOGIC_VECTORtoBIT_VECTOR
--
-- Purpose: Conversion fun. from STD_ULOGIC_VECTOR to BIT_VECTOR
--
-- Mapping: 0, L --> 0
-- 1, H --> 1
-- X, W --> vX if Xflag is TRUE
-- X, W --> 0 if Xflag is FALSE
-- Z --> vZ if Zflag is TRUE
-- Z --> 0 if Zflag is FALSE
-- U --> vU if Uflag is TRUE
-- U --> 0 if Uflag is FALSE
-- - --> vDC if DCflag is TRUE
-- - --> 0 if DCflag is FALSE
--
---------------------------------------------------------------------
function STD_ULOGIC_VECTORtoBIT_VECTOR (V: STD_ULOGIC_VECTOR
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT_VECTOR is
-- pragma built_in SYN_FEED_THRU
-- pragma subpgm_id 397
--synopsys synthesis_off
alias Value: STD_ULOGIC_VECTOR (V'length-1 downto 0) is V;
variable Result: BIT_VECTOR (V'length-1 downto 0);
--synopsys synthesis_on
begin
--synopsys synthesis_off
for i in Value'range loop
case Value(i) is
when '0' | 'L' =>
Result(i) := '0';
when '1' | 'H' =>
Result(i) := '1';
when 'X' =>
if ( Xflag ) then
Result(i) := vX;
else
Result(i) := '0';
assert FALSE
report "STD_ULOGIC_VECTORtoBIT_VECTOR: X --> 0"
severity WARNING;
end if;
when 'W' =>
if ( Xflag ) then
Result(i) := vX;
else
Result(i) := '0';
assert FALSE
report "STD_ULOGIC_VECTORtoBIT_VECTOR: W --> 0"
severity WARNING;
end if;
when 'Z' =>
if ( Zflag ) then
Result(i) := vZ;
else
Result(i) := '0';
assert FALSE
report "STD_ULOGIC_VECTORtoBIT_VECTOR: Z --> 0"
severity WARNING;
end if;
when 'U' =>
if ( Uflag ) then
Result(i) := vU;
else
Result(i) := '0';
assert FALSE
report "STD_ULOGIC_VECTORtoBIT_VECTOR: U --> 0"
severity WARNING;
end if;
when '-' =>
if ( DCflag ) then
Result(i) := vDC;
else
Result(i) := '0';
assert FALSE
report "STD_ULOGIC_VECTORtoBIT_VECTOR: - --> 0"
severity WARNING;
end if;
end case;
end loop;
return Result;
--synopsys synthesis_on
end STD_ULOGIC_VECTORtoBIT_VECTOR;
---------------------------------------------------------------------
--
-- Function: STD_ULOGICtoBIT
--
-- Purpose: Conversion function from STD_ULOGIC to BIT
--
-- Mapping: 0, L --> 0
-- 1, H --> 1
-- X, W --> vX if Xflag is TRUE
-- X, W --> 0 if Xflag is FALSE
-- Z --> vZ if Zflag is TRUE
-- Z --> 0 if Zflag is FALSE
-- U --> vU if Uflag is TRUE
-- U --> 0 if Uflag is FALSE
-- - --> vDC if DCflag is TRUE
-- - --> 0 if DCflag is FALSE
--
---------------------------------------------------------------------
function STD_ULOGICtoBIT (V: STD_ULOGIC
--synopsys synthesis_off
; vX, vZ, vU, vDC: BIT := '0';
Xflag, Zflag, Uflag, DCflag: BOOLEAN := FALSE
--synopsys synthesis_on
) return BIT is
-- pragma built_in SYN_FEED_THRU
-- pragma subpgm_id 398
variable Result: BIT;
begin
--synopsys synthesis_off
case V is
when '0' | 'L' =>
Result := '0';
when '1' | 'H' =>
Result := '1';
when 'X' =>
if ( Xflag ) then
Result := vX;
else
Result := '0';
assert FALSE
report "STD_ULOGICtoBIT: X --> 0"
severity WARNING;
end if;
when 'W' =>
if ( Xflag ) then
Result := vX;
else
Result := '0';
assert FALSE
report "STD_ULOGICtoBIT: W --> 0"
severity WARNING;
end if;
when 'Z' =>
if ( Zflag ) then
Result := vZ;
else
Result := '0';
assert FALSE
report "STD_ULOGICtoBIT: Z --> 0"
severity WARNING;
end if;
when 'U' =>
if ( Uflag ) then
Result := vU;
else
Result := '0';
assert FALSE
report "STD_ULOGICtoBIT: U --> 0"
severity WARNING;
end if;
when '-' =>
if ( DCflag ) then
Result := vDC;
else
Result := '0';
assert FALSE
report "STD_ULOGICtoBIT: - --> 0"
severity WARNING;
end if;
end case;
return Result;
--synopsys synthesis_on
end STD_ULOGICtoBIT;
--------------------------------------------------------------------------
function AND_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 399
variable result: STD_LOGIC;
begin
result := '1';
for i in ARG'range loop
result := result and ARG(i);
end loop;
return result;
end;
function NAND_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 400
begin
return not AND_REDUCE(ARG);
end;
function OR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 401
variable result: STD_LOGIC;
begin
result := '0';
for i in ARG'range loop
result := result or ARG(i);
end loop;
return result;
end;
function NOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 402
begin
return not OR_REDUCE(ARG);
end;
function XOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 403
variable result: STD_LOGIC;
begin
result := '0';
for i in ARG'range loop
result := result xor ARG(i);
end loop;
return result;
end;
function XNOR_REDUCE(ARG: STD_LOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 404
begin
return not XOR_REDUCE(ARG);
end;
function AND_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 405
variable result: STD_LOGIC;
begin
result := '1';
for i in ARG'range loop
result := result and ARG(i);
end loop;
return result;
end;
function NAND_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 406
begin
return not AND_REDUCE(ARG);
end;
function OR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 407
variable result: STD_LOGIC;
begin
result := '0';
for i in ARG'range loop
result := result or ARG(i);
end loop;
return result;
end;
function NOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 408
begin
return not OR_REDUCE(ARG);
end;
function XOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 409
variable result: STD_LOGIC;
begin
result := '0';
for i in ARG'range loop
result := result xor ARG(i);
end loop;
return result;
end;
function XNOR_REDUCE(ARG: STD_ULOGIC_VECTOR) return UX01 is
-- pragma subpgm_id 410
begin
return not XOR_REDUCE(ARG);
end;
--synopsys synthesis_off
function fun_BUF3S(Input, Enable: UX01; Strn: STRENGTH) return STD_LOGIC is
-- pragma subpgm_id 411
type TRISTATE_TABLE is array(STRENGTH, UX01, UX01) of STD_LOGIC;
-- truth table for tristate "buf" function (Enable active Low)
constant tbl_BUF3S: TRISTATE_TABLE :=
-- ----------------------------------------------------
-- | Input U X 0 1 | Enable Strength |
-- ---------------------------------|-----------------|
((('U', 'U', 'U', 'U'), --| U X01 |
('U', 'X', 'X', 'X'), --| X X01 |
('Z', 'Z', 'Z', 'Z'), --| 0 X01 |
('U', 'X', '0', '1')), --| 1 X01 |
(('U', 'U', 'U', 'U'), --| U X0H |
('U', 'X', 'X', 'X'), --| X X0H |
('Z', 'Z', 'Z', 'Z'), --| 0 X0H |
('U', 'X', '0', 'H')), --| 1 X0H |
(('U', 'U', 'U', 'U'), --| U XL1 |
('U', 'X', 'X', 'X'), --| X XL1 |
('Z', 'Z', 'Z', 'Z'), --| 0 XL1 |
('U', 'X', 'L', '1')), --| 1 XL1 |
(('U', 'U', 'U', 'Z'), --| U X0Z |
('U', 'X', 'X', 'Z'), --| X X0Z |
('Z', 'Z', 'Z', 'Z'), --| 0 X0Z |
('U', 'X', '0', 'Z')), --| 1 X0Z |
(('U', 'U', 'U', 'U'), --| U XZ1 |
('U', 'X', 'X', 'X'), --| X XZ1 |
('Z', 'Z', 'Z', 'Z'), --| 0 XZ1 |
('U', 'X', 'Z', '1')), --| 1 XZ1 |
(('U', 'U', 'U', 'U'), --| U WLH |
('U', 'W', 'W', 'W'), --| X WLH |
('Z', 'Z', 'Z', 'Z'), --| 0 WLH |
('U', 'W', 'L', 'H')), --| 1 WLH |
(('U', 'U', 'U', 'U'), --| U WLZ |
('U', 'W', 'W', 'Z'), --| X WLZ |
('Z', 'Z', 'Z', 'Z'), --| 0 WLZ |
('U', 'W', 'L', 'Z')), --| 1 WLZ |
(('U', 'U', 'U', 'U'), --| U WZH |
('U', 'W', 'W', 'W'), --| X WZH |
('Z', 'Z', 'Z', 'Z'), --| 0 WZH |
('U', 'W', 'Z', 'H')), --| 1 WZH |
(('U', 'U', 'U', 'U'), --| U W0H |
('U', 'W', 'W', 'W'), --| X W0H |
('Z', 'Z', 'Z', 'Z'), --| 0 W0H |
('U', 'W', '0', 'H')), --| 1 W0H |
(('U', 'U', 'U', 'U'), --| U WL1 |
('U', 'W', 'W', 'W'), --| X WL1 |
('Z', 'Z', 'Z', 'Z'), --| 0 WL1 |
('U', 'W', 'L', '1')));--| 1 WL1 |
begin
return tbl_BUF3S(Strn, Enable, Input);
end fun_BUF3S;
function fun_BUF3SL(Input, Enable: UX01; Strn: STRENGTH) return STD_LOGIC is
-- pragma subpgm_id 412
type TRISTATE_TABLE is array(STRENGTH, UX01, UX01) of STD_LOGIC;
-- truth table for tristate "buf" function (Enable active Low)
constant tbl_BUF3SL: TRISTATE_TABLE :=
-- ----------------------------------------------------
-- | Input U X 0 1 | Enable Strength |
-- ---------------------------------|-----------------|
((('U', 'U', 'U', 'U'), --| U X01 |
('U', 'X', 'X', 'X'), --| X X01 |
('U', 'X', '0', '1'), --| 0 X01 |
('Z', 'Z', 'Z', 'Z')), --| 1 X01 |
(('U', 'U', 'U', 'U'), --| U X0H |
('U', 'X', 'X', 'X'), --| X X0H |
('U', 'X', '0', 'H'), --| 0 X0H |
('Z', 'Z', 'Z', 'Z')), --| 1 X0H |
(('U', 'U', 'U', 'U'), --| U XL1 |
('U', 'X', 'X', 'X'), --| X XL1 |
('U', 'X', 'L', '1'), --| 0 XL1 |
('Z', 'Z', 'Z', 'Z')), --| 1 XL1 |
(('U', 'U', 'U', 'Z'), --| U X0Z |
('U', 'X', 'X', 'Z'), --| X X0Z |
('U', 'X', '0', 'Z'), --| 0 X0Z |
('Z', 'Z', 'Z', 'Z')), --| 1 X0Z |
(('U', 'U', 'U', 'U'), --| U XZ1 |
('U', 'X', 'X', 'X'), --| X XZ1 |
('U', 'X', 'Z', '1'), --| 0 XZ1 |
('Z', 'Z', 'Z', 'Z')), --| 1 XZ1 |
(('U', 'U', 'U', 'U'), --| U WLH |
('U', 'W', 'W', 'W'), --| X WLH |
('U', 'W', 'L', 'H'), --| 0 WLH |
('Z', 'Z', 'Z', 'Z')), --| 1 WLH |
(('U', 'U', 'U', 'U'), --| U WLZ |
('U', 'W', 'W', 'Z'), --| X WLZ |
('U', 'W', 'L', 'Z'), --| 0 WLZ |
('Z', 'Z', 'Z', 'Z')), --| 1 WLZ |
(('U', 'U', 'U', 'U'), --| U WZH |
('U', 'W', 'W', 'W'), --| X WZH |
('U', 'W', 'Z', 'H'), --| 0 WZH |
('Z', 'Z', 'Z', 'Z')), --| 1 WZH |
(('U', 'U', 'U', 'U'), --| U W0H |
('U', 'W', 'W', 'W'), --| X W0H |
('U', 'W', '0', 'H'), --| 0 W0H |
('Z', 'Z', 'Z', 'Z')), --| 1 W0H |
(('U', 'U', 'U', 'U'), --| U WL1 |
('U', 'W', 'W', 'W'), --| X WL1 |
('U', 'W', 'L', '1'), --| 0 WL1 |
('Z', 'Z', 'Z', 'Z')));--| 1 WL1 |
begin
return tbl_BUF3SL(Strn, Enable, Input);
end fun_BUF3SL;
function fun_MUX2x1(Input0, Input1, Sel: UX01) return UX01 is
-- pragma subpgm_id 413
type MUX_TABLE is array (UX01, UX01, UX01) of UX01;
-- truth table for "MUX2x1" function
constant tbl_MUX2x1: MUX_TABLE :=
--------------------------------------------
--| In0 'U' 'X' '0' '1' | Sel In1 |
--------------------------------------------
((('U', 'U', 'U', 'U'), --| 'U' 'U' |
('U', 'U', 'U', 'U'), --| 'X' 'U' |
('U', 'X', '0', '1'), --| '0' 'U' |
('U', 'U', 'U', 'U')), --| '1' 'U' |
(('U', 'X', 'U', 'U'), --| 'U' 'X' |
('U', 'X', 'X', 'X'), --| 'X' 'X' |
('U', 'X', '0', '1'), --| '0' 'X' |
('X', 'X', 'X', 'X')), --| '1' 'X' |
(('U', 'U', '0', 'U'), --| 'U' '0' |
('U', 'X', '0', 'X'), --| 'X' '0' |
('U', 'X', '0', '1'), --| '0' '0' |
('0', '0', '0', '0')), --| '1' '0' |
(('U', 'U', 'U', '1'), --| 'U' '1' |
('U', 'X', 'X', '1'), --| 'X' '1' |
('U', 'X', '0', '1'), --| '0' '1' |
('1', '1', '1', '1')));--| '1' '1' |
begin
return tbl_MUX2x1(Input1, Sel, Input0);
end fun_MUX2x1;
function fun_MAJ23(Input0, Input1, Input2: UX01) return UX01 is
-- pragma subpgm_id 414
type MAJ23_TABLE is array (UX01, UX01, UX01) of UX01;
----------------------------------------------------------------------------
-- The "tbl_MAJ23" truth table return 1 if the majority of three
-- inputs is 1, a 0 if the majority is 0, a X if unknown, and a U if
-- uninitialized.
----------------------------------------------------------------------------
constant tbl_MAJ23: MAJ23_TABLE :=
--------------------------------------------
--| In0 'U' 'X' '0' '1' | In1 In2 |
--------------------------------------------
((('U', 'U', 'U', 'U'), --| 'U' 'U' |
('U', 'U', 'U', 'U'), --| 'X' 'U' |
('U', 'U', '0', 'U'), --| '0' 'U' |
('U', 'U', 'U', '1')), --| '1' 'U' |
(('U', 'U', 'U', 'U'), --| 'U' 'X' |
('U', 'X', 'X', 'X'), --| 'X' 'X' |
('U', 'X', '0', 'X'), --| '0' 'X' |
('U', 'X', 'X', '1')), --| '1' 'X' |
(('U', 'U', '0', 'U'), --| 'U' '0' |
('U', 'X', '0', 'X'), --| 'X' '0' |
('0', '0', '0', '0'), --| '0' '0' |
('U', 'X', '0', '1')), --| '1' '0' |
(('U', 'U', 'U', '1'), --| 'U' '1' |
('U', 'X', 'X', '1'), --| 'X' '1' |
('U', 'X', '0', '1'), --| '0' '1' |
('1', '1', '1', '1')));--| '1' '1' |
begin
return tbl_MAJ23(Input0, Input1, Input2);
end fun_MAJ23;
function fun_WiredX(Input0, Input1: STD_ULOGIC) return STD_LOGIC is
-- pragma subpgm_id 415
TYPE stdlogic_table IS ARRAY(STD_ULOGIC, STD_ULOGIC) OF STD_LOGIC;
-- truth table for "WiredX" function
-------------------------------------------------------------------
-- resolution function
-------------------------------------------------------------------
CONSTANT resolution_table : stdlogic_table := (
-- ---------------------------------------------------------
-- | U X 0 1 Z W L H - | |
-- ---------------------------------------------------------
( 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', 'U' ), -- | U |
( 'U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X' ), -- | X |
( 'U', 'X', '0', 'X', '0', '0', '0', '0', 'X' ), -- | 0 |
( 'U', 'X', 'X', '1', '1', '1', '1', '1', 'X' ), -- | 1 |
( 'U', 'X', '0', '1', 'Z', 'W', 'L', 'H', 'X' ), -- | Z |
( 'U', 'X', '0', '1', 'W', 'W', 'W', 'W', 'X' ), -- | W |
( 'U', 'X', '0', '1', 'L', 'W', 'L', 'W', 'X' ), -- | L |
( 'U', 'X', '0', '1', 'H', 'W', 'W', 'H', 'X' ), -- | H |
( 'U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X' ));-- | - |
begin
return resolution_table(Input0, Input1);
end fun_WiredX;
--synopsys synthesis_on
end;
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