From: Anton Blanchard <anton@linux.ibm.com>
Date: Tue, 10 Sep 2019 05:39:50 +0000 (+1000)
Subject: Register outputs on loadstore1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=819f8200905fa4ab7b6eafef8cb42606d6982bd9;p=microwatt.git

Register outputs on loadstore1

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
---

diff --git a/loadstore1.vhdl b/loadstore1.vhdl
index bf006d9..f35b64d 100644
--- a/loadstore1.vhdl
+++ b/loadstore1.vhdl
@@ -13,36 +13,46 @@ entity loadstore1 is
 		clk   : in std_ulogic;
 
 		l_in  : in Decode2ToLoadstore1Type;
+
 		l_out : out Loadstore1ToLoadstore2Type
 	);
 end loadstore1;
 
 architecture behave of loadstore1 is
-	signal l       : Decode2ToLoadstore1Type;
+	signal r, rin : Loadstore1ToLoadstore2Type;
 	signal lsu_sum : std_ulogic_vector(63 downto 0);
 begin
 	-- Calculate the address in the first cycle
-	lsu_sum <= std_ulogic_vector(unsigned(l.addr1) + unsigned(l.addr2)) when l.valid = '1' else (others => '0');
+	lsu_sum <= std_ulogic_vector(unsigned(l_in.addr1) + unsigned(l_in.addr2)) when l_in.valid = '1' else (others => '0');
 
 	loadstore1_0: process(clk)
 	begin
 		if rising_edge(clk) then
-			l <= l_in;
+			r <= rin;
 		end if;
 	end process;
 
 	loadstore1_1: process(all)
+		variable v : Loadstore1ToLoadstore2Type;
 	begin
-		l_out.valid <= l.valid;
-		l_out.load <= l.load;
-		l_out.data <= l.data;
-		l_out.write_reg <= l.write_reg;
-		l_out.length <= l.length;
-		l_out.byte_reverse <= l.byte_reverse;
-		l_out.sign_extend <= l.sign_extend;
-		l_out.update <= l.update;
-		l_out.update_reg <= l.update_reg;
-
-		l_out.addr <= lsu_sum;
+		v := r;
+
+		v.valid := l_in.valid;
+		v.load := l_in.load;
+		v.data := l_in.data;
+		v.write_reg := l_in.write_reg;
+		v.length := l_in.length;
+		v.byte_reverse := l_in.byte_reverse;
+		v.sign_extend := l_in.sign_extend;
+		v.update := l_in.update;
+		v.update_reg := l_in.update_reg;
+
+		v.addr := lsu_sum;
+
+		-- Update registers
+		rin <= v;
+
+                -- Update outputs
+                l_out <= v;
 	end process;
 end;