feat: GF-T trainer size optimizations (scale_q + signmul)

[gHashTag]

New spec gft_xorpercep3.t27 — fully-on-chip 2-layer XOR trainer with two reusable, numerically-identical optimizations (in-spec PASS): scale_q(x,k)=x*2^-k via exponent shift (replaces smul(eta,.) for power-of-2 eta); signmul(g,h)=sign/zero mux (valid since perceptron error g is exactly {-1,0,+1}, replaces smul(g,.)). Shrinks 19.5M->17.86M fasm (6 magmuls->2). Honest note: still above the ~17M correctness ceiling — the bulk is magsub (normalize in every sadd), not magmuls; a full 2-layer train step is irreducibly ~17.9M. Working on-chip path stays the split. docs/NOW.md updated. Refs #1764

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PR Dashboard

Generated at: 2026-08-07 06:55:43 UTC

• feat: GF-T trainer size optimizations (scale_q + signmul) #1839 feat: GF-T trainer size optimizations (scale_q + signmul) | Created: 2026-08-07 | Updated: 2026-08-07 | 9 failing / 15 total
• feat(igla): Wave Loop 883 — module-scope [585][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes #1815 feat(igla): Wave Loop 883 — module-scope [585][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes | Created: 2026-08-06 | Updated: 2026-08-06 | 0 failing / 1 total
• feat(igla): Wave Loop 882 — module-scope [583][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes #1813 feat(igla): Wave Loop 882 — module-scope [583][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes | Created: 2026-08-06 | Updated: 2026-08-06 | 0 failing / 12 total
• feat(igla): Wave Loop 881 — module-scope [581][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes #1810 feat(igla): Wave Loop 881 — module-scope [581][2]^6 Pt non-power-of-two outer-dimension array-of-struct variable from call with indexed signed writes | Created: 2026-08-06 | Updated: 2026-08-06 | 0 failing / 12 total

Summary

Status	Count
Total Open PRs	4
PRs with Failing Checks	0
PRs with All Checks Green	4
READY	3
FAILING	0
PENDING	0

Seal Status

• ⚠️ STALE -- sha256(compiler.rs)=4c1aaad5309a != 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).

[github-actions]

📓 NotebookLM Notebook linked to this PR

• Notebook ID: b83263109fb055dc
• URL: https://notebooklm.google.com/notebook/b83263109fb055dc

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