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elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='0') then -- "1"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
-- "X" => "X"
elsif (cam_array(addr)(i)='0' and x_array(addr)(i)='1') then -- "X"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '1';
-- "U" => "1"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='1') then -- "U"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
end if;
end if;
end loop;
writex_done <= true;
write0_done <= false;
write1_done <= false;
end if;
if wrbusy_int = '1' then
write_start_1 <= '1';
write_start <= write_start_1;
else
write_start_1 <= '0';
write_start <= '0';
end if;
else -- 2 Cycle write
-------------------
-- 2 CYCLE WRITE --
-------------------
-----------------
-- WRITE_ZEROS --
-----------------
if write0 = true then
for i in 0 to width-1 loop
if ipattern(i) = '0' then
-- "0" => "0"
if (cam_array(addr)(i)='0' and x_array(addr)(i)='0') then -- "0"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '0';
-- "1" => "X"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='0') then -- "1"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '1';
-- "X" => "X"
elsif (cam_array(addr)(i)='0' and x_array(addr)(i)='1') then -- "X"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '1';
-- "U" => "0"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='1') then -- "U"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '0';
end if;
elsif ipattern(i) = '1' then
-- "0" => "X"
if (cam_array(addr)(i)='0' and x_array(addr)(i)='0') then -- "0"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '1';
-- "1" => "1"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='0') then -- "1"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
-- "X" => "X"
elsif (cam_array(addr)(i)='0' and x_array(addr)(i)='1') then -- "X"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '1';
-- "U" => "1"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='1') then -- "U"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
end if;
end if;
end loop;
write0_done <= true;
write1_done <= false;
writex_done <= false;
end if;
----------------
-- WRITE_ONES --
----------------
if write1 = true then
for i in 0 to width-1 loop
if ipattern(i) = '0' then
-- "0" => "0"
if (cam_array(addr)(i)='0' and x_array(addr)(i)='0') then -- "0"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '0';
-- "1" => "U"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='0') then -- "1"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '1';
-- "X" => "0"
elsif (cam_array(addr)(i)='0' and x_array(addr)(i)='1') then -- "X"
cam_array_tmp(addr)(i) := '0';
x_array_tmp(addr)(i) := '0';
-- "U" => "U"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='1') then -- "U"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '1';
end if;
elsif ipattern(i) = '1' then
-- "0" => "U"
if (cam_array(addr)(i)='0' and x_array(addr)(i)='0') then -- "0"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '1';
-- "1" => "1"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='0') then -- "1"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
-- "X" => "1"
elsif (cam_array(addr)(i)='0' and x_array(addr)(i)='1') then -- "X"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '0';
-- "U" => "U"
elsif (cam_array(addr)(i)='1' and x_array(addr)(i)='1') then -- "U"
cam_array_tmp(addr)(i) := '1';
x_array_tmp(addr)(i) := '1';
end if;
end if;
end loop;
write0_done <= false;
write1_done <= true;
writex_done <= false;
end if;
if wrbusy_int = '1' then
write_start <= '1';
else
write_start <= '0';
end if;
end if; -- wrxused_int
else -- if wrdelete = '1' then
--------------------
-- 2 CYCLE DELETE --
--------------------
-- Delete is a 2-cycle write
----------------
-- WRITE_ONES --
----------------
if write0 = true then
for i in 0 to width-1 loop
cam_array_tmp(addr)(i) := '1';
end loop;
write0_done <= true;
write1_done <= false;
writex_done <= false;
end if;
-------------
-- WRITE_X --
-------------
if write1 = true then
for i in 0 to width-1 loop
x_array_tmp(addr)(i) := '1';
end loop;
write1_done <= true;
write0_done <= false;
writex_done <= false;
end if;
if wrbusy_int = '1' then
write_start <= '1';
else
write_start <= '0';
end if;
end if; -- wrdelete
cam_array <= cam_array_tmp;
x_array <= x_array_tmp;
--------------------------------------
-- FAST MULTIPLE: READ DURING WRITE --
--------------------------------------
-- Now we need to update mbits, mcount during the write.
if match_mode = "FAST_MULTIPLE" then
mfound_int <= '0';
maddress_int <= (others => '1');
count := 0;
mbits_tmp := (others => '0');
if (writex = true) and (wrxused_int = '1') then
waddr_fm2: for i in 0 to numwords-1 loop
wword_fm2: for j in 0 to width-1 loop
if (((x_array_tmp(i)(j) = '0') and (cam_array_tmp(i)(j) = (ipattern(j) xor wrx_int(j)))) or
((x_array_tmp(i)(j) = '1') and (cam_array_tmp(i)(j) = '0'))) then
if j = width-1 then
mbits_tmp(i) := '1';
count := count + 1;
end if;
else
exit wword_fm2;
end if;
end loop wword_fm2;
end loop waddr_fm2;
else
waddr_fm3: for i in 0 to numwords-1 loop
wword_fm3: for j in 0 to width-1 loop
if (((x_array_tmp(i)(j) = '0') and (cam_array_tmp(i)(j) = ipattern(j))) or
((x_array_tmp(i)(j) = '1') and (cam_array_tmp(i)(j) = '0'))) then
if j = width-1 then
mbits_tmp(i) := '1';
count := count + 1;
end if;
else
exit wword_fm3;
end if;
end loop wword_fm3;
end loop waddr_fm3;
end if;
mcount_int <= ieee.std_logic_arith.conv_std_logic_vector(count, widthad);
mbits_int <= mbits_tmp;
end if; -- end of FAST MULTIPLE
---------------------------------
-- MULTIPLE: READ DURING WRITE --
---------------------------------
-- THIS IMPLEMENTATION IS INACCURATE
if match_mode = "MULTIPLE" then
mfound_int <= '0';
maddress_int <= (others => '1');
mbits_tmp := (others => '0');
if (writex = true) and (wrxused_int = '1') then
mcount_int <= (others => '0');
first_read_in_write <= false;
else
if first_read_in_write = false then
first_read_in_write <= true;
-- Read even addresses but they appear on the odd locations
-- of mbits.
count := 0;
waddr_mm2: for i in 0 to numwords-1 loop
if ( (i mod 2) = 0 ) then
if (mbits_int(i) = '1') then -- counting previous even address matches
count := count + 1;
end if;
wword_mm2: for j in 0 to width-1 loop
if (((x_array_tmp(i)(j) = '0') and (cam_array_tmp(i)(j) = ipattern(j))) or
((x_array_tmp(i)(j) = '1') and (cam_array_tmp(i)(j) = '0'))) then
if j = width-1 then
mbits_tmp(i+1) := '1';
count := count + 1;
end if;
else
exit wword_mm2;
end if;
end loop wword_mm2;
end if;
end loop waddr_mm2;
else
first_read_in_write <= false;
-- Read odd addresses.
count := 0;
waddr_mm3: for i in numwords-1 downto 0 loop
if (i mod 2) = 1 then
mbits_tmp(i-1) := mbits_tmp(i);
else
wword_mm3: for j in 0 to width-1 loop
if (((x_array_tmp(i)(j) = '0') and (cam_array_tmp(i)(j) = ipattern(j))) or
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