Discussion:
[gem5-dev] Change in gem5/gem5[master]: cpu: Use correct way index in the LTAGE loop predictor
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Louis Delhez (Gerrit)
2018-11-26 22:02:14 UTC
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Louis Delhez has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/14635


Change subject: cpu: Use correct way index in the LTAGE loop predictor
......................................................................

cpu: Use correct way index in the LTAGE loop predictor

The first way was always used in specLoopUpdate regardless of the branch.

Change-Id: I03d1abb955cbfe3600b141a91282e1077562645a
---
M src/cpu/pred/ltage.cc
1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/src/cpu/pred/ltage.cc b/src/cpu/pred/ltage.cc
index d6cc087..6aa76c2 100644
--- a/src/cpu/pred/ltage.cc
+++ b/src/cpu/pred/ltage.cc
@@ -311,7 +311,7 @@
LTAGE::specLoopUpdate(Addr pc, bool taken, BranchInfo* bi)
{
if (bi->loopHit>=0) {
- int index = lindex(pc);
+ int index = bi->loopIndex + bi->loopHit;
if (taken != ltable[index].dir) {
ltable[index].currentIterSpec = 0;
} else {
--
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I03d1abb955cbfe3600b141a91282e1077562645a
Gerrit-Change-Number: 14635
Gerrit-PatchSet: 1
Gerrit-Owner: Louis Delhez <***@ucla.edu>
Gerrit-MessageType: newchange
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