ROM revision --- deeper changes

[OlivierBBB]

Note

Overhauls the ROM module (new columns, padding and constraint model), streamlines MODEXP handling and pricing across HUB/OOB, updates block-hash/jumpdest lookups, and replaces/moderns precompile helper macros.

• ROM module (major redesign):
  • Introduces new column model (romColumn*), explicit padding semantics, and revised constancy/binarity/heartbeat constraints.
  • Rewrites opcode derivation from raw bytes, PUSH handling (PUSH_VALUE, claimed-by-push), and jumpdest analysis; updates instruction decoder lookup.
  • Adds detailed bytecode padding docs/diagrams; reorganizes generalities sections and terminology.
• HUB: MODEXP flow:
  • Refactors common/success paths: byte-size extraction, leading-word log, pricing, and result handling.
  • Simplifies flags/weighted sums; adjusts result transfer/copy sizes to 512 and clarifies success conditions.
• OOB: precompiles/pricing:
  • Reworks MODEXP pricing (ceilings, big quotient threshold), XBS checks/max, and extraction gating.
  • Updates BLS MSM/pairing checks to new call wrappers and clearer gas comparisons.
  • Clarifies intro; splits/modularizes inputs sections.
• Lookups:
  • Consolidates BLOCKHASH lookup and updates jumpdest vetting to target opcodeIsJumpDest.
• Pkg/macros and spec plumbing:
  • Adds generic oobCallTo{Div,Mod} and refactors precompile call macros (simpler signatures); removes legacy mod_calls.
  • Expands pkg/rom.sty with new column aliases; minor includes/ordering in hub/spec.
• Txn data:
  • Simplifies constancy definition; removes prover-only columns.
• Misc:
  • Drops various obsolete notes/upgrade docs; minor version/tag docs (mxp_v2, rlp_txn_v2, rom_v3).

^{Written by Cursor Bugbot for commit f1f64a8. This will update automatically on new commits. Configure here.}

[cursor]

Bug: Undefined variable in oobCallToDiv macro refactor

The \oobCallToDiv macro uses the undefined variable \locMax in the expression {\locMax + 7}. This looks like a refactoring oversight; \locMaxMbsBbs is defined and appears to be the intended variable here.

oob/precompiles/modexp/pricing.tex#L45-L46

linea-specification/oob/precompiles/modexp/pricing.tex

Lines 45 to 46 in f1f64a8

	{0}{\locMax + 7}
	{0}{8}

 

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