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test: CI quantifies 'size costs TIME (microcode steps), not AREA' - #1891

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test: CI quantifies 'size costs TIME (microcode steps), not AREA'#1891
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test/emit-size-is-time

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@gHashTag gHashTag commented Aug 7, 2026

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Quantified the whitepaper's headline claim in CI. The emit-bitexact gate now prints, per topology, the microcode step count next to the one-shared-multiplier datapath invariant: (2,2,1)=32 steps → (2,4,2)=88 → deep [3,4,4,2,1]=216, while the synth area report shows cell counts stay ~constant (13945 → 17468). So 'network size costs TIME (microcode steps), not AREA (one shared multiply/add)' is now measured on every PR, not just asserted in prose.

Bonus: the step count also predicts on-silicon timing-marginality — more steps per frame = more chances for a glitch on the timing-relaxed shared-core path (why the generated trainer with trainable biases needed more seed-search). Ties the CI metric to the silicon reality found in cycles 86-89. Also added [N steps / N regs] to each per-topology OK line. Refs #1764

The emit-bitexact gate now prints, per topology, the microcode step count next to
the one-shared-multiplier datapath invariant: (2,2,1)=32 steps -> (2,4,2)=88 -> deep
[3,4,4,2,1]=216, while the synth area report shows cells stay ~constant (13945 ->
17468). So the whitepaper's headline claim -- network size costs TIME (microcode
steps), not AREA (one shared multiply/add) -- is measured on every PR, not just
asserted in prose. The step count also predicts on-silicon timing-marginality (more
steps per frame = more chances for a glitch on the timing-relaxed shared-core path),
tying the CI metric to the silicon reality from cycles 86-89. Also added
[N steps / N regs] to each per-topology bit-exact OK line.

Refs #1764

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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📓 NotebookLM Notebook linked to this PR

This notebook contains session context, decisions, and artifacts for this work.

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PR Dashboard

Generated at: 2026-08-07 18:05:43 UTC

Summary

Status Count
Total Open PRs 13
PRs with Failing Checks 1
PRs with All Checks Green 12
READY 5
FAILING 1
PENDING 0

Seal Status

  • ⚠️ STALE -- sha256(compiler.rs)=f74459fc23c3 != manifest seal=87e5cbd3ad94.
    The committed NMSE numbers were certified against an older compiler.rs.
    Run scripts/reseal-check.sh locally for the two-step reseal command (advisory; not a merge gate).

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gHashTag merged commit a7e3ea5 into master Aug 7, 2026
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gHashTag deleted the test/emit-size-is-time branch August 7, 2026 18:12
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