Concurrent VS Sequencial

Mariana D. (vtrmg) OP 2023-08-14 19:32 #7478168

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Hey, I'm making a binary ordering. I have two questions: 1. Is there any way that I can make this code simpler? 2. Can I make this code concurrent or sequential using the functions I already write on top?

Thanks, ;D

package MY_PACKAGE is function portaand(SIGNAL A , B: in bit) return bit; function portaor(SIGNAL A , B: in bit) return bit; END MY_PACKAGE;

PACKAGE BODY MY_PACKAGE is FUNCTION portaand (SIGNAL A, B: bit ) RETURN bit IS BEGIN RETURN A AND B; END portaand;

FUNCTION portaor (SIGNAL A, B: bit ) RETURN bit IS BEGIN RETURN A OR B; END portaor;

END MY_PACKAGE;

use work.MY_PACKAGE.all;

entity ORDENADORBINARIO is PORT ( n4, n3,n2,n1,n0 : IN bit; y4,y3,y2,y1,y0 : OUT bit ); end ORDENADORBINARIO;

architecture Behavioral of ORDENADORBINARIO is SIGNAL x0,x1,x2,x3,z0,z1,z2,w0,w1,w2,o0,o1,p0,p1,q0 : bit; begin x0 <= portaand( n4 , n3 ); z0 <= portaor( n4 , n3 ); x1 <= portaand( n2 , z0 ); z1 <= portaor( n2 , z0 ); x2 <= portaand( n1 , z1 ); z2 <= portaor( n1 , z1 ); x3 <= portaand ( z2, n0); w0 <= portaand ( x0, x1) ; o0 <= portaor ( x0, x1) ; w1 <= portaand ( o0, x2) ; o1 <= portaor ( o0, x2) ; w2 <= portaand ( o1 , x3) ; p0 <= portaand (w0 , w1) ; q0 <= portaor( w0,w1); p1 <= portaand ( w2 , q0);

y4 <= portaor (n0, z2); y3 <= portaor (o1, x3) ; y2 <= portaor ( w2, q0); y1 <= portaand (p0 , p1 ); y0 <= portaor (p0 , p1);

end Behavioral;

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Lothar M. (lkmiller) Moderator (Company: Titel) 2023-08-15 11:17 #7478539

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there is no need for customized "or" and "and" funktions. In real life everybody would write it somehow this way:

entity ORDENADORBINARIO is

  PORT ( n4, n3,n2,n1,n0 : IN bit;

       y4,y3,y2,y1,y0 : OUT bit );

end ORDENADORBINARIO;

architecture Behavioral of ORDENADORBINARIO is

  SIGNAL x0,x1,x2,x3,z0,z1,z2,w0,w1,w2,o0,o1,p0,p1,q0 : bit;

  x0 <= n4 and n3;

  z0 <= n4 or n3;

  x1 <= n2 and z0;

  z1 <= n2 or z0;

  y4 <= n0 or z2;

  y3 <= o1 or x3;

  y2 <= w2 or q0;

  y1 <= p0 and p1;

  y0 <= p0 or p1;

end Behavioral;

But much better redable would be to use vectors:

entity ORDENADORBINARIO is

  PORT ( n : IN  bit_vector (4 downto 0);

         y : OUT bit_vector (4 downto 0));

end ORDENADORBINARIO;

architecture Behavioral of ORDENADORBINARIO is

  y <= "01000" when n = "00000" else

  y <= "01010" when n = "00001" else

  y <= "01100" when n = "00010" else

  y <= "01001" when n = "00011" else

  y <= "01010" when n = "00100" else

  y <= "11000" when n = "11100" else

  y <= "01100" when n = "11101" else

  y <= "01010" when n = "11110" else

  y <= "01011";  -- n = "11111"

end Behavioral;

Litle hint: of course you must insert the correct values for those y <= "?????" assignments.

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