Problème avec mon multiplexeur

Bonsoir
j'ai un probléme sur mon multiplexer si quelqu'un peut m'aider merci

Code:

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LIBRARY ieee;
USE ieee.std_logic_1164.all;
 
ENTITY multiplexer IS 
 
   PORT
   (
	-- Les entrées
     R0   : IN STD_LOGIC_VECTOR (15 downto 0);
     R1   : IN STD_LOGIC_VECTOR (15 downto 0);
     R2   : IN STD_LOGIC_VECTOR (15 downto 0);
     R3   : IN STD_LOGIC_VECTOR (15 downto 0);
     R4   : IN STD_LOGIC_VECTOR (15 downto 0);
     R5   : IN STD_LOGIC_VECTOR (15 downto 0);
     R6   : IN STD_LOGIC_VECTOR (15 downto 0);
	  R7   : IN STD_LOGIC_VECTOR (15 downto 0);
	  DIN	 : IN STD_LOGIC_VECTOR (15 downto 0);
	  Gin	 : IN STD_LOGIC_VECTOR (15 downto 0);
 
		-- Les selecteurs
	  R	 	 : IN STD_LOGIC_VECTOR (7 downto 0);
	  Gout	 : IN STD_LOGIC;
	  DINout	 : IN STD_LOGIC;
 
	  -- La sortie
	  S	 	 : OUT STD_LOGIC_VECTOR (15 downto 0)
   );
 
 END multiplexer;
 
 ARCHITECTURE multibhv of multiplexer is
 
 BEGIN
 S <= R0  when R="00000000" and Gout="0" and DINout="0" else
		R1  when R="01000000" and Gout="0" and DINout="0" else
		R2  when R="00100000" and Gout="0" and DINout="0" else
		R3	 when R="00010000" and Gout="0" and DINout="0" else
		R4  when R="00001000" and Gout="0" and DINout="0" else
		R5  when R="00000100" and Gout="0" and DINout="0" else
		R6  when R="00000010" and Gout="0" and DINout="0" else
		R7  when R="00000001" and Gout="0" and DINout="0" else
		Gin when R="00000000" and Gout="1" and DINout="0" else
		DIN ;
 END multibhv;

LIBRARY ieee; USE ieee.std_logic_1164.all; USE IEEE.STD_LOGIC_ARITH.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY multiplexer IS PORT ( -- Les entrées R0, R1, R2, R3, R4, R5, R6, R7, DIN, Gin : IN STD_LOGIC_VECTOR (15 downto 0); -- Les selecteurs R : IN STD_LOGIC_VECTOR (7 downto 0); Gout, DINout : IN STD_LOGIC; -- La sortie S : OUT STD_LOGIC_VECTOR (15 downto 0) ); END multiplexer; ARCHITECTURE arch_multiplexer of multiplexer is BEGIN S <= R0 when R="00000000" and Gout='0' and DINout='0' else R1 when R="01000000" and Gout='0' and DINout='0' else R2 when R="00100000" and Gout='0' and DINout='0' else R3 when R="00010000" and Gout='0' and DINout='0' else R4 when R="00001000" and Gout='0' and DINout='0' else R5 when R="00000100" and Gout='0' and DINout='0' else R6 when R="00000010" and Gout='0' and DINout='0' else R7 when R="00000001" and Gout='0' and DINout='0' else Gin when R="00000000" and Gout='1' and DINout='0' else DIN ; END arch_multiplexer;