From 80aa70ec2e18015a3d03989437b1a0adcbdc0f1e Mon Sep 17 00:00:00 2001
From: Tom Verbeure <tom_verbeure@yahoo.com>
Date: Wed, 7 Sep 2016 20:32:32 -0700
Subject: Only clock mem_wdata when necessary

---
 picorv32.v | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'picorv32.v')

diff --git a/picorv32.v b/picorv32.v
index 88443b2..8ea791c 100644
--- a/picorv32.v
+++ b/picorv32.v
@@ -498,9 +498,11 @@ module picorv32 #(
 		end else begin
 			if (mem_la_read || mem_la_write) begin
 				mem_addr <= mem_la_addr;
-				mem_wdata <= mem_la_wdata;
 				mem_wstrb <= mem_la_wstrb & {4{mem_la_write}};
 			end
+            if (mem_la_write) begin
+				mem_wdata <= mem_la_wdata;
+            end
 			case (mem_state)
 				0: begin
 					if (mem_do_prefetch || mem_do_rinst || mem_do_rdata) begin
-- 
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