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D-U9-ABACUS: schoolbook U9 x U9 with carry escalation and power-of-two anchors (probe) - #389

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AdaWorldAPI merged 13 commits into

claude/u9-abacus

Oct 29, 2026

Merged

D-U9-ABACUS: schoolbook U9 x U9 with carry escalation and power-of-two anchors (probe)#389
AdaWorldAPI merged 13 commits into
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claude/u9-abacus

Commits on Oct 29, 2026
- Probe D-U9-ABACUS: bit-plane schoolbook U9 x U9 with carry-save columns
  claude
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  1847e69
- Add a static-schedule carry-save fold to the abacus probe
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  c194406
- Satisfy clippy and rustfmt in the abacus probe
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  ea53883
- Report D-U9-ABACUS: exact, but no performance case against B
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- Add candidate D: A' products with a 16-bit carry column instead of f32
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- Report candidate D: the 16-bit carry column beats the f32 detour
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- Scope the abacus refusal to bit-plane multiplication
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- Add candidate E: B's split at 128 with the anchor term as a shift
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- Merge claude/u9-head-to-head into claude/u9-abacus
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- Report candidate E: the 128 anchor ties B, no adoption
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- Merge branch 'claude/u9-head-to-head' into claude/u9-abacus
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- Time compact operands and consume every plane in the abacus probe
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  897e8ab
- Re-measure the U9 abacus probe on compact operands
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