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library ieee;
use ieee.std_logic_1164.all;
entity decoder is
port (
p : in std_logic_vector(4 downto 0);
d : out std_logic_vector(31 downto 0)
);
end decoder;
architecture behav of decoder is
begin
with p select
d<="00000000000000000000000000000001" when "00000",
"00000000000000000000000000000010" when "00001",
"00000000000000000000000000000100" when "00010",
"00000000000000000000000000001000" when "00011",
"00000000000000000000000000010000" when "00100",
"00000000000000000000000000100000" when "00101",
"00000000000000000000000001000000" when "00110",
"00000000000000000000000010000000" when "00111",
"00000000000000000000000100000000" when "01000",
"00000000000000000000001000000000" when "01001",
"00000000000000000000010000000000" when "01010",
"00000000000000000000100000000000" when "01011",
"00000000000000000001000000000000" when "01100",
"00000000000000000010000000000000" when "01101",
"00000000000000000100000000000000" when "01110",
"00000000000000001000000000000000" when "01111",
"00000000000000010000000000000000" when "10000",
"00000000000000100000000000000000" when "10001",
"00000000000001000000000000000000" when "10010",
"00000000000010000000000000000000" when "10011",
"00000000000100000000000000000000" when "10100",
"00000000001000000000000000000000" when "10101",
"00000000010000000000000000000000" when "10110",
"00000000100000000000000000000000" when "10111",
"00000001000000000000000000000000" when "11000",
"00000010000000000000000000000000" when "11001",
"00000100000000000000000000000000" when "11010",
"00001000000000000000000000000000" when "11011",
"00010000000000000000000000000000" when "11100",
"00100000000000000000000000000000" when "11101",
"01000000000000000000000000000000" when "11110",
"10000000000000000000000000000000" when "11111",
"00000000000000000000000000000000" when others;
end behav;
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