cpu-o3: fix bug: ftq pc beyond fsq end

Change-Id: Ide0a7eb0b0d3c31226f57e0a0d64e1d813de506c
OpenXiangShan · Dec 13, 2024 · 3a97593 · 3a97593
1 parent ba70d3b
commit 3a97593
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/src/cpu/pred/ftb/decoupled_bpred.cc b/src/cpu/pred/ftb/decoupled_bpred.cc
@@ -604,9 +604,6 @@ DecoupledBPUWithFTB::tick()
         dbpFtbStats.fsqFullCannotEnq++;
     }
 
-    if (!receivedPred && numOverrideBubbles == 0 && sentPCHist) {
-        numOverrideBubbles = generateFinalPredAndCreateBubbles();
-    }
     if (!squashing) {
         DPRINTF(DecoupleBP, "DecoupledBPUWithFTB::tick()\n");
         DPRINTF(Override, "DecoupledBPUWithFTB::tick()\n");
@@ -665,6 +662,10 @@ DecoupledBPUWithFTB::tick()
         DPRINTF(Override, "Stream queue is full, don't request prediction\n");
     }
     squashing = false;
+
+    if (!receivedPred && numOverrideBubbles == 0 && sentPCHist) {
+        numOverrideBubbles = generateFinalPredAndCreateBubbles();
+    }
 }
 
 // ideal_tick() is copied from commit: e7294f1813c331dbce8bcfa4d5eb981f7c8440c5