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| author | Mitch Hayenga <mitch.hayenga@arm.com> | 2016-04-05 11:48:37 -0500 |
|---|---|---|
| committer | Mitch Hayenga <mitch.hayenga@arm.com> | 2016-04-05 11:48:37 -0500 |
| commit | 1578d2d0b66d995684cee77b3fe527ed0493d41c (patch) | |
| tree | 120b81ec01c889a41c26ddbc6e26cb0434db764b /src/cpu/pred/bi_mode.cc | |
| parent | 7bc52af7716168baa5deb28bb88475ddbba5d62a (diff) | |
| download | gem5-1578d2d0b66d995684cee77b3fe527ed0493d41c.tar.xz | |
cpu: Add an indirect branch target predictor
This patch adds a configurable indirect branch predictor that can be indexed
by a combination of GHR and path history hashes. Implements the functionality
described in:
"Target prediction for indirect jumps" by Chang, Hao, and Patt
http://dl.acm.org/citation.cfm?id=264209
Diffstat (limited to 'src/cpu/pred/bi_mode.cc')
| -rw-r--r-- | src/cpu/pred/bi_mode.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/cpu/pred/bi_mode.cc b/src/cpu/pred/bi_mode.cc index c2a41cd4d..bc974bac8 100644 --- a/src/cpu/pred/bi_mode.cc +++ b/src/cpu/pred/bi_mode.cc @@ -236,6 +236,12 @@ BiModeBP::retireSquashed(void *bp_history) delete history; } +unsigned +BiModeBP::getGHR(void *bp_history) const +{ + return static_cast<BPHistory*>(bp_history)->globalHistoryReg; +} + void BiModeBP::updateGlobalHistReg(bool taken) { |