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-rw-r--r--src/cpu/o3/commit_impl.hh41
1 files changed, 24 insertions, 17 deletions
diff --git a/src/cpu/o3/commit_impl.hh b/src/cpu/o3/commit_impl.hh
index f0566233c..bb2b17209 100644
--- a/src/cpu/o3/commit_impl.hh
+++ b/src/cpu/o3/commit_impl.hh
@@ -1,4 +1,5 @@
/*
+ * Copyright 2014 Google, Inc.
* Copyright (c) 2010-2014 ARM Limited
* All rights reserved
*
@@ -1105,20 +1106,27 @@ DefaultCommit<Impl>::commitInsts()
}
}
- int count = 0;
- Addr oldpc;
- // Debug statement. Checks to make sure we're not
- // currently updating state while handling PC events.
- assert(!thread[tid]->noSquashFromTC && !thread[tid]->trapPending);
- do {
- oldpc = pc[tid].instAddr();
- cpu->system->pcEventQueue.service(thread[tid]->getTC());
- count++;
- } while (oldpc != pc[tid].instAddr());
- if (count > 1) {
- DPRINTF(Commit,
- "PC skip function event, stopping commit\n");
- break;
+ bool onInstBoundary = !head_inst->isMicroop() ||
+ head_inst->isLastMicroop() ||
+ !head_inst->isDelayedCommit();
+
+ if (onInstBoundary) {
+ int count = 0;
+ Addr oldpc;
+ // Make sure we're not currently updating state while
+ // handling PC events.
+ assert(!thread[tid]->noSquashFromTC &&
+ !thread[tid]->trapPending);
+ do {
+ oldpc = pc[tid].instAddr();
+ cpu->system->pcEventQueue.service(thread[tid]->getTC());
+ count++;
+ } while (oldpc != pc[tid].instAddr());
+ if (count > 1) {
+ DPRINTF(Commit,
+ "PC skip function event, stopping commit\n");
+ break;
+ }
}
// Check if an instruction just enabled interrupts and we've
@@ -1128,9 +1136,8 @@ DefaultCommit<Impl>::commitInsts()
// case squash now to make sure the interrupt is handled.
//
// If we don't do this, we might end up in a live lock situation
- if (!interrupt && avoidQuiesceLiveLock &&
- (!head_inst->isMicroop() || head_inst->isLastMicroop()) &&
- cpu->checkInterrupts(cpu->tcBase(0)))
+ if (!interrupt && avoidQuiesceLiveLock &&
+ onInstBoundary && cpu->checkInterrupts(cpu->tcBase(0)))
squashAfter(tid, head_inst);
} else {
DPRINTF(Commit, "Unable to commit head instruction PC:%s "