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OpenXiangShan / GEM5 Public

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Fork 73
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Issues 14
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Pair tage no abtb utage#849

Draft

Yakkhini wants to merge 28 commits into

xs-devOpenXiangShan/GEM5:xs-devfrom

pair-tage-no-abtb-utageOpenXiangShan/GEM5:pair-tage-no-abtb-utageCopy head branch name to clipboard

Conversation Commits28 (28)Checks Files changed

Draft

Pair tage no abtb utage#849
Yakkhini wants to merge 28 commits into
xs-devfrom
pair-tage-no-abtb-utage

Commits

Commits on May 6, 2026

cpu: add pair tage framework
Yakkhini
committed
cpu: process second entry
Yakkhini
committed
cpu: train first block in pair tage
Yakkhini
committed
cpu: fix initialization order of pairtage to avoid assertion fail
Yakkhini
committed
cpu: train second block in pair tage
Yakkhini
committed
cpu: enqueue second block
Yakkhini
committed
cpu: not handle second block when first block has been override
Yakkhini
committed
cpu: cast and store metas in second block
Yakkhini
committed
cpu: do not enqueue second block when it disagreed
Yakkhini
committed
cpu: add parity to distinguish 1st 2nd block phase in pair tage
Yakkhini
committed
cpu: add pairtage entry branch pc range check
Yakkhini
committed
cpu: Add PairTAGE observability counters
Yakkhini
committed
cpu: Add PairTAGE first-only mode
Yakkhini
committed
cpu: Allocate PairTAGE entries toward higher tables
Yakkhini
committed
cpu: Preserve PairTAGE providers on mismatch
Yakkhini
committed
cpu: Split PairTAGE second-block first-block failures
Yakkhini
committed
cpu: Split PairTAGE first-block coverage reasons
Yakkhini
committed
cpu: Add PairTAGE fallthrough-first-block support
Yakkhini
committed
cpu: Increase default PairTAGE capacity to 8x
Yakkhini
committed
cpu: enable standalone fallthrough train by default
Yakkhini
committed
cpu: Enable PairTAGE odd-phase operation
Yakkhini
committed
cpu: Increase default PairTAGE capacity to 32x
Yakkhini
committed
cpu: support typed first-block pairtage training
Yakkhini
committed
cpu: increase default pairtage table capacity
Yakkhini
committed
cpu: fix unexpected PHist update multiple times in same cycle
Yakkhini
committed

Commits on May 7, 2026

cpu: Preserve PairTAGE second-block context
Yakkhini
committed
cpu: Age PairTAGE provider identity
Yakkhini
committed
cpu: Use PairTAGE first-block only
Yakkhini
committed

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