From f67b1431655c291fc1c99857a5c1ef624d5b264c Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@linux.ibm.com>
Date: Mon, 22 Mar 2021 10:17:49 +1100
Subject: [PATCH] Reformat plru

Also fix a typo

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
---
 plru.vhdl | 94 +++++++++++++++++++++++++++----------------------------
 1 file changed, 46 insertions(+), 48 deletions(-)

diff --git a/plru.vhdl b/plru.vhdl
index 6caa2ef..9d7d9c1 100644
--- a/plru.vhdl
+++ b/plru.vhdl
@@ -5,17 +5,17 @@ use ieee.math_real.all;
 
 entity plru is
     generic (
-	BITS : positive := 2
-	)
-	;
+        BITS : positive := 2
+        )
+        ;
     port (
-	clk    : in std_ulogic;
-	rst    : in std_ulogic;
+        clk    : in std_ulogic;
+        rst    : in std_ulogic;
 
-	acc    : in std_ulogic_vector(BITS-1 downto 0);
-	acc_en : in std_ulogic;
-	lru    : out std_ulogic_vector(BITS-1 downto 0)
-	);
+        acc    : in std_ulogic_vector(BITS-1 downto 0);
+        acc_en : in std_ulogic;
+        lru    : out std_ulogic_vector(BITS-1 downto 0)
+        );
 end entity plru;
 
 architecture rtl of plru is
@@ -28,50 +28,48 @@ begin
 
     -- XXX Check if we can turn that into a little ROM instead that
     -- takes the tree bit vector and returns the LRU. See if it's better
-    -- in term of FPGA resouces usage...
+    -- in term of FPGA resource usage...
     get_lru: process(tree)
-	variable node : node_t;
+        variable node : node_t;
     begin
-	node := 0;
-	for i in 0 to BITS-1 loop
---	    report "GET: i:" & integer'image(i) & " node:" & integer'image(node) & " val:" & std_ulogic'image(tree(node));
-	    lru(BITS-1-i) <= tree(node);
-	    if i /= BITS-1 then
-		node := node * 2;
-		if tree(node) = '1' then
-		    node := node + 2;
-		else
-		    node := node + 1;
-		end if;
-	    end if;
-	end loop;
+        node := 0;
+        for i in 0 to BITS-1 loop
+--          report "GET: i:" & integer'image(i) & " node:" & integer'image(node) & " val:" & std_ulogic'image(tree(node));
+            lru(BITS-1-i) <= tree(node);
+            if i /= BITS-1 then
+                node := node * 2;
+                if tree(node) = '1' then
+                    node := node + 2;
+                else
+                    node := node + 1;
+                end if;
+            end if;
+        end loop;
     end process;
 
     update_lru: process(clk)
-	variable node : node_t;
-	variable abit : std_ulogic;
+        variable node : node_t;
+        variable abit : std_ulogic;
     begin
-	if rising_edge(clk) then
-	    if rst = '1' then
-		tree <= (others => '0');
-	    elsif acc_en = '1' then
-		node := 0;
-		for i in 0 to BITS-1 loop
-		    abit := acc(BITS-1-i);
-		    tree(node) <= not abit;
---		    report "UPD: i:" & integer'image(i) & " node:" & integer'image(node) & " val" & std_ulogic'image(not abit);
-		    if i /= BITS-1 then
-			node := node * 2;
-			if abit = '1' then
-			    node := node + 2;
-			else
-			    node := node + 1;
-			end if;
-		    end if;
-		end loop;
-	    end if;	    
-	end if;
+        if rising_edge(clk) then
+            if rst = '1' then
+                tree <= (others => '0');
+            elsif acc_en = '1' then
+                node := 0;
+                for i in 0 to BITS-1 loop
+                    abit := acc(BITS-1-i);
+                    tree(node) <= not abit;
+--                  report "UPD: i:" & integer'image(i) & " node:" & integer'image(node) & " val" & std_ulogic'image(not abit);
+                    if i /= BITS-1 then
+                        node := node * 2;
+                        if abit = '1' then
+                            node := node + 2;
+                        else
+                            node := node + 1;
+                        end if;
+                    end if;
+                end loop;
+            end if;            
+        end if;
     end process;
 end;
-
-