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cpu: split LTAGE implementation into a base TAGE and a derived LTAGE

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The new derived LTAGE is equivalent to the original LTAGE implementation
The default values of the TAGE branch predictor match the settings of the
8C-TAGE configuration described in https://www.jilp.org/vol8/v8paper1.pdf

Change-Id: I8323adbfd5c9a45db23cfff234218280e639f9ed
Signed-off-by: Pau Cabre <pau.cabre@metempsy.com>
Reviewed-on: https://gem5-review.googlesource.com/c/14435
Reviewed-by: Sudhanshu Jha <sudhanshu.jha@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
This commit is contained in:
Pau Cabre
2018-11-20 01:04:56 +01:00
parent 3bb49cb2b0
commit b2078cef37
6 changed files with 1110 additions and 828 deletions
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2
src/cpu/pred/SConscript
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@@ -43,7 +43,9 @@ Source('indirect.cc')
Source('ras.cc')
Source('tournament.cc')
Source ('bi_mode.cc')
Source('tage.cc')
Source('ltage.cc')
DebugFlag('FreeList')
DebugFlag('Branch')
DebugFlag('Tage')
DebugFlag('LTage')