changeset 6fd588813142 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=6fd588813142
description:
O3: Fix offset calculation into storeQueue buffer for store->load
forwarding
Calculation of offset to copy from storeQueue[idx].data structure for
load to
store forwarding fixed to be difference in bytes between store and load
virtual
addresses. Previous method would induce bug where a load would index
into
buffer at the wrong location.
diffstat:
src/cpu/o3/lsq_unit.hh | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diffs (12 lines):
diff -r 6173b87e7652 -r 6fd588813142 src/cpu/o3/lsq_unit.hh
--- a/src/cpu/o3/lsq_unit.hh Mon May 23 10:40:19 2011 -0500
+++ b/src/cpu/o3/lsq_unit.hh Mon May 23 10:40:21 2011 -0500
@@ -616,7 +616,7 @@
// If the store's data has all of the data needed, we can forward.
if ((store_has_lower_limit && store_has_upper_limit)) {
// Get shift amount for offset into the store's data.
- int shift_amt = req->getVaddr() & (store_size - 1);
+ int shift_amt = req->getVaddr() -
storeQueue[store_idx].inst->effAddr;
memcpy(data, storeQueue[store_idx].data + shift_amt,
req->getSize());
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