[rob/lsu] Delay execution of uncacheable loads by a cycle for QoR.

riscv-boom · Jul 19, 2019 · 4dd5800 · 4dd5800
1 parent 75dc3ff
commit 4dd5800
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/main/scala/exu/rob.scala b/src/main/scala/exu/rob.scala
@@ -876,7 +876,8 @@ class Rob(
     io.commit.ld_mask(w) := io.commit.valids(w) && rob_head_is_load(w)
   }
 
-  io.com_load_is_at_rob_head := rob_head_is_load(PriorityEncoder(rob_head_vals.asUInt))
+  io.com_load_is_at_rob_head := RegNext(rob_head_is_load(PriorityEncoder(rob_head_vals.asUInt)) &&
+                                        !will_commit.reduce(_||_))
 
   //--------------------------------------------------
   // Handle passing out signals to printf in dpath