📄 freq_change_chk.vhd
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if sourse1(15 downto 12) >= sourse2(15 downto 12) then
reg_dec(15 downto 12) <= sourse1(15 downto 12) - sourse2(15 downto 12);
if sourse1(19 downto 16) >= sourse2(19 downto 16) then
reg_dec(19 downto 16) <= sourse1(19 downto 16) - sourse2(19 downto 16);
if sourse1(23 downto 20) >= sourse2(23 downto 20) then
reg_dec(23 downto 20) <= sourse1(23 downto 20) - sourse2(23 downto 20);
if sourse1(27 downto 24) >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
else
reg_dec(23 downto 20) <= sourse1(23 downto 20) + "1010" - sourse2(23 downto 20);
if sourse1(27 downto 24) - '1' >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
end if;
else
reg_dec(19 downto 16) <= sourse1(19 downto 16) + "1010" - sourse2(19 downto 16);
if sourse1(23 downto 20) - '1' >= sourse2(23 downto 20) then
reg_dec(23 downto 20) <= sourse1(23 downto 20) - '1' - sourse2(23 downto 20);
if sourse1(27 downto 24) >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
else
reg_dec(23 downto 20) <= sourse1(23 downto 20) - '1' + "1010" - sourse2(23 downto 20);
if sourse1(27 downto 24) - '1' >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
end if;
end if;
else
reg_dec(15 downto 12) <= sourse1(15 downto 12) + "1010" - sourse2(15 downto 12);
if sourse1(19 downto 16) - '1' >= sourse2(19 downto 16) then
reg_dec(19 downto 16) <= sourse1(19 downto 16) - '1' - sourse2(19 downto 16);
if sourse1(23 downto 20) >= sourse2(23 downto 20) then
reg_dec(23 downto 20) <= sourse1(23 downto 20) - sourse2(23 downto 20);
if sourse1(27 downto 24) >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
else
reg_dec(23 downto 20) <= sourse1(23 downto 20) + "1010" - sourse2(23 downto 20);
if sourse1(27 downto 24) - '1' >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
end if;
else
reg_dec(19 downto 16) <= sourse1(19 downto 16) - '1' + "1010" - sourse2(19 downto 16);
if sourse1(23 downto 20) - '1' >= sourse2(23 downto 20) then
reg_dec(23 downto 20) <= sourse1(23 downto 20) - '1' - sourse2(23 downto 20);
if sourse1(27 downto 24) >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
else
reg_dec(23 downto 20) <= sourse1(23 downto 20) - '1' + "1010" - sourse2(23 downto 20);
if sourse1(27 downto 24) - '1' >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
end if;
end if;
end if;
else
reg_dec(11 downto 8) <= sourse1(11 downto 8) + "1010" - sourse2(11 downto 8);
if sourse1(15 downto 12) - '1' >= sourse2(15 downto 12) then
reg_dec(15 downto 12) <= sourse1(15 downto 12) - '1' - sourse2(15 downto 12);
if sourse1(19 downto 16) >= sourse2(19 downto 16) then
reg_dec(19 downto 16) <= sourse1(19 downto 16) - sourse2(19 downto 16);
if sourse1(23 downto 20) >= sourse2(23 downto 20) then
reg_dec(23 downto 20) <= sourse1(23 downto 20) - sourse2(23 downto 20);
if sourse1(27 downto 24) >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
else
reg_dec(27 downto 24) <= sourse1(27 downto 24) + "1010" - sourse2(27 downto 24);
if sourse1(31 downto 28) - '1' >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - '1' - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28)- '1' + "1010" - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - '1' - sourse2(35 downto 32);
end if;
end if;
else
reg_dec(23 downto 20) <= sourse1(23 downto 20) + "1010" - sourse2(23 downto 20);
if sourse1(27 downto 24) - '1' >= sourse2(27 downto 24) then
reg_dec(27 downto 24) <= sourse1(27 downto 24) - '1' - sourse2(27 downto 24);
if sourse1(31 downto 28) >= sourse2(31 downto 28) then
reg_dec(31 downto 28) <= sourse1(31 downto 28) - sourse2(31 downto 28);
reg_dec(35 downto 32) <= sourse1(35 downto 32) - sourse2(35 downto 32);
else
reg_dec(31 downto 28) <= sourse1(31 downto 28) + "1010" - sourse2(31 downto 28);
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