changeset b51a2a09ac7d in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=b51a2a09ac7d
description:
cpu: Fixed a bug on where to fetch the next instruction from
Figure out if the next instruction to fetch comes from the micro-op ROM
or not. Otherwise, wrong instructions may be fetched.
diffstat:
src/cpu/o3/fetch_impl.hh | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diffs (21 lines):
diff -r 30c700ee0d47 -r b51a2a09ac7d src/cpu/o3/fetch_impl.hh
--- a/src/cpu/o3/fetch_impl.hh Mon Jul 20 09:15:18 2015 -0500
+++ b/src/cpu/o3/fetch_impl.hh Mon Jul 20 09:15:18 2015 -0500
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2010-2014 ARM Limited
+ * Copyright (c) 2012-2013 AMD
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
@@ -1371,6 +1372,10 @@
} while ((curMacroop || decoder[tid]->instReady()) &&
numInst < fetchWidth &&
fetchQueue[tid].size() < fetchQueueSize);
+
+ // Re-evaluate whether the next instruction to fetch is in micro-op ROM
+ // or not.
+ inRom = isRomMicroPC(thisPC.microPC());
}
if (predictedBranch) {
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