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-- VHDL data flow description generated from `count4x`
--              date : Thu Aug  2 08:55:34 2001


-- Entity Declaration

ENTITY count4x IS
  PORT (
  clk : in BIT; -- clk
  rst : in BIT; -- rst
  q : out bit_vector(3 DOWNTO 0) ;      -- q
  vdd : in BIT; -- vdd
  vss : in BIT  -- vss
  );
END count4x;


-- Architecture Declaration

ARCHITECTURE VBE OF count4x IS
  SIGNAL current_state : REG_VECTOR(3 DOWNTO 0) REGISTER;       -- current_state
  SIGNAL current_state_s15 : BIT;               -- current_state_s15
  SIGNAL next_state_s15 : BIT;          -- next_state_s15
  SIGNAL current_state_s14 : BIT;               -- current_state_s14
  SIGNAL next_state_s14 : BIT;          -- next_state_s14
  SIGNAL current_state_s13 : BIT;               -- current_state_s13
  SIGNAL next_state_s13 : BIT;          -- next_state_s13
  SIGNAL current_state_s12 : BIT;               -- current_state_s12
  SIGNAL next_state_s12 : BIT;          -- next_state_s12
  SIGNAL current_state_s11 : BIT;               -- current_state_s11
  SIGNAL next_state_s11 : BIT;          -- next_state_s11
  SIGNAL current_state_s10 : BIT;               -- current_state_s10
  SIGNAL next_state_s10 : BIT;          -- next_state_s10
  SIGNAL current_state_s9 : BIT;                -- current_state_s9
  SIGNAL next_state_s9 : BIT;           -- next_state_s9
  SIGNAL current_state_s8 : BIT;                -- current_state_s8
  SIGNAL next_state_s8 : BIT;           -- next_state_s8
  SIGNAL current_state_s7 : BIT;                -- current_state_s7
  SIGNAL next_state_s7 : BIT;           -- next_state_s7
  SIGNAL current_state_s6 : BIT;                -- current_state_s6
  SIGNAL next_state_s6 : BIT;           -- next_state_s6
  SIGNAL current_state_s5 : BIT;                -- current_state_s5
  SIGNAL next_state_s5 : BIT;           -- next_state_s5
  SIGNAL current_state_s4 : BIT;                -- current_state_s4
  SIGNAL next_state_s4 : BIT;           -- next_state_s4
  SIGNAL current_state_s3 : BIT;                -- current_state_s3
  SIGNAL next_state_s3 : BIT;           -- next_state_s3
  SIGNAL current_state_s2 : BIT;                -- current_state_s2
  SIGNAL next_state_s2 : BIT;           -- next_state_s2
  SIGNAL current_state_s1 : BIT;                -- current_state_s1
  SIGNAL next_state_s1 : BIT;           -- next_state_s1
  SIGNAL current_state_s0 : BIT;                -- current_state_s0
  SIGNAL next_state_s0 : BIT;           -- next_state_s0
  SIGNAL next_state : BIT_VECTOR(3 DOWNTO 0);   -- next_state

BEGIN
  next_state(0) <= (next_state_s0 OR next_state_s1 OR next_state_s3 
OR next_state_s4 OR next_state_s6 OR next_state_s8 
OR next_state_s12 OR next_state_s14);
  next_state(1) <= (next_state_s0 OR next_state_s1 OR next_state_s2 
OR next_state_s4 OR next_state_s5 OR next_state_s9 
OR next_state_s12 OR next_state_s13);
  next_state(2) <= (next_state_s0 OR next_state_s1 OR next_state_s2 
OR next_state_s3 OR next_state_s5 OR next_state_s8 
OR next_state_s10 OR next_state_s11);
  next_state(3) <= (next_state_s1 OR next_state_s2 OR next_state_s4 
OR next_state_s6 OR next_state_s7 OR next_state_s8 
OR next_state_s9 OR next_state_s10);
  next_state_s0 <= current_state_s15;
  current_state_s0 <= (NOT(current_state(3)) AND current_state(2) AND 
current_state(1) AND current_state(0));
  next_state_s1 <= current_state_s0;
  current_state_s1 <= (current_state(3) AND current_state(2) AND 
current_state(1) AND current_state(0));
  next_state_s2 <= current_state_s1;
  current_state_s2 <= (current_state(3) AND current_state(2) AND 
current_state(1) AND NOT(current_state(0)));
  next_state_s3 <= current_state_s2;
  current_state_s3 <= (NOT(current_state(3)) AND current_state(2) AND 
NOT(current_state(1)) AND current_state(0));
  next_state_s4 <= current_state_s3;
  current_state_s4 <= (current_state(3) AND NOT(current_state(2)) AND 
current_state(1) AND current_state(0));
  next_state_s5 <= current_state_s4;
  current_state_s5 <= (NOT(current_state(3)) AND current_state(2) AND 
current_state(1) AND NOT(current_state(0)));
  next_state_s6 <= current_state_s5;
  current_state_s6 <= (current_state(3) AND NOT(current_state(2)) AND 
NOT(current_state(1)) AND current_state(0));
  next_state_s7 <= current_state_s6;
  current_state_s7 <= (current_state(3) AND NOT(current_state(2)) AND 
NOT(current_state(1)) AND NOT(current_state(0)));
  next_state_s8 <= current_state_s7;
  current_state_s8 <= (current_state(3) AND current_state(2) AND NOT(
current_state(1)) AND current_state(0));
  next_state_s9 <= current_state_s8;
  current_state_s9 <= (current_state(3) AND NOT(current_state(2)) AND 
current_state(1) AND NOT(current_state(0)));
  next_state_s10 <= current_state_s9;
  current_state_s10 <= (current_state(3) AND current_state(2) AND NOT(
current_state(1)) AND NOT(current_state(0)));
  next_state_s11 <= current_state_s10;
  current_state_s11 <= (NOT(current_state(3)) AND current_state(2) AND 
NOT(current_state(1)) AND NOT(current_state(0)));
  next_state_s12 <= current_state_s11;
  current_state_s12 <= (NOT(current_state(3)) AND NOT(current_state(2)) 
AND current_state(1) AND current_state(0));
  next_state_s13 <= current_state_s12;
  current_state_s13 <= (NOT(current_state(3)) AND NOT(current_state(2)) 
AND current_state(1) AND NOT(current_state(0)));
  next_state_s14 <= current_state_s13;
  current_state_s14 <= (NOT(current_state(3)) AND NOT(current_state(2)) 
AND NOT(current_state(1)) AND current_state(0));
  next_state_s15 <= current_state_s14;
  current_state_s15 <= (NOT(current_state(3)) AND NOT(current_state(2)) 
AND NOT(current_state(1)) AND NOT(current_state(0)));
  label0 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')
  BEGIN
    current_state(0) <= GUARDED (next_state(0) OR rst);
  END BLOCK label0;
  label1 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')
  BEGIN
    current_state(1) <= GUARDED (next_state(1) OR rst);
  END BLOCK label1;
  label2 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')
  BEGIN
    current_state(2) <= GUARDED (next_state(2) OR rst);
  END BLOCK label2;
  label3 : BLOCK ((NOT((clk'STABLE)) AND clk) = '1')
  BEGIN
    current_state(3) <= GUARDED (next_state(3) AND NOT(rst));
  END BLOCK label3;

q(0) <= ((current_state_s1 AND NOT(rst)) OR (
current_state_s3 AND NOT(rst)) OR (current_state_s5 AND NOT(rst))
 OR (current_state_s7 AND NOT(rst)) OR (
current_state_s9 AND NOT(rst)) OR (current_state_s11 AND NOT(rst)
) OR (current_state_s13 AND NOT(rst)) OR (
current_state_s15 AND NOT(rst)));

q(1) <= ((current_state_s2 AND NOT(rst)) OR (
current_state_s3 AND NOT(rst)) OR (current_state_s6 AND NOT(rst))
 OR (current_state_s7 AND NOT(rst)) OR (
current_state_s10 AND NOT(rst)) OR (current_state_s11 AND NOT(rst)
) OR (current_state_s14 AND NOT(rst)) OR (
current_state_s15 AND NOT(rst)));

q(2) <= ((current_state_s4 AND NOT(rst)) OR (
current_state_s5 AND NOT(rst)) OR (current_state_s6 AND NOT(rst))
 OR (current_state_s7 AND NOT(rst)) OR (
current_state_s12 AND NOT(rst)) OR (current_state_s13 AND NOT(rst)
) OR (current_state_s14 AND NOT(rst)) OR (
current_state_s15 AND NOT(rst)));

q(3) <= ((current_state_s8 AND NOT(rst)) OR (
current_state_s9 AND NOT(rst)) OR (current_state_s10 AND NOT(rst)
) OR (current_state_s11 AND NOT(rst)) OR (
current_state_s12 AND NOT(rst)) OR (current_state_s13 AND NOT(rst)
) OR (current_state_s14 AND NOT(rst)) OR (
current_state_s15 AND NOT(rst)));
END;