Refine branch history table

[jserv]

This extracts duplicated BHT logic into reusable inline helpers:

• bht_find_max_idx(): find most frequent indirect jump target
• bht_find_min_idx(): find LFU replacement slot
• bht_should_translate(): check JIT translation threshold

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Summary by cubic

Refactored branch history table logic into small inline helpers to remove duplication and make JIT translation decisions consistent.

• Refactors
  • Added bht_find_max_idx to pick the most frequent indirect jump target.
  • Added bht_find_min_idx for LFU replacement (returns first empty slot).
  • Added bht_should_translate to centralize threshold and SATP checks; used in parse_branch_history_table and translate_chained_block.
  • Updated rv32_template to use bht_find_min_idx when recording branch targets.

^{Written for commit 5fe0bcb. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 3 files

[jserv]

Benchmarks

Details

Benchmark suite	Current: 5fe0bcb	Previous: 50a75ef	Ratio
Dhrystone	1633.333 DMIPS	1624 DMIPS	0.99
CoreMark	952.119 iterations/sec	950.045 iterations/sec	1.00

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