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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.hh | |
| 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.hh')
| -rw-r--r-- | src/cpu/pred/bi_mode.hh | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/cpu/pred/bi_mode.hh b/src/cpu/pred/bi_mode.hh index da7c49f46..120a6ffd9 100644 --- a/src/cpu/pred/bi_mode.hh +++ b/src/cpu/pred/bi_mode.hh @@ -63,6 +63,7 @@ class BiModeBP : public BPredUnit void btbUpdate(Addr branch_addr, void * &bp_history); void update(Addr branch_addr, bool taken, void *bp_history, bool squashed); void retireSquashed(void *bp_history); + unsigned getGHR(void *bp_history) const; private: void updateGlobalHistReg(bool taken); |