mask-risc: Boolean membership (And/Or/Xor/AndNot/Ternlog) over resident planes → Count/Any with no mask written - #1270
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…nes into Count/Any with no mask
A single 2/3-input op whose operands are all resident planes, folded by
Count or Any of its own dst, is one truth table. Program::fused_ternlog
recognises it (a derived predicate, like fused_terminal); the executor
folds it through ndarray::simd::mask_ternlog_{popcount,any} over the
borrowed planes' words, combining only the (at most two) extent-cut words
in a one-word register restricted by edge_mask. No scratch slot is carved
and no membership word is written. The population's own last word is
treated as a cut word, so an ODD table never counts dead tail bits.
The 256-arm dispatch generator now also emits ternlog_popcount_dispatch
and ternlog_any_dispatch (checked by --check and by the arm-count test).
Keep, All, Not, scratch operands and multi-op programs keep the tiled path.
Tests (tests/fused_ternlog.rs): fold == Keep arm == bit-serial oracle for
the four two-input ops over 7 populations x 4 plane shapes x absolute
extents cut at 63/64/65/127/128/129, all 256 tables at 65/133 rows, the
odd-table tail, zero allocation + untouched poisoned arena (with the twin
half proving the probe sees a Keep carve), and the recogniser's admit and
refuse halves.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GXUahz73MZxtxWcfpHp9dG
examples/ternlog_fused_probe.rs: Count 1.25-1.44x at 1 row, 3.4-7.4x at 1%, 5.3-20x whole vs Keep + popcount_batch_u64 (oracle-checked). Board: entries/2026-09-23-ternlog-count-any-fold.md; D-WFL-T1-FUSED, -T1-FUSED', -FUSE status cells updated. OQ-5 untouched. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GXUahz73MZxtxWcfpHp9dG
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Included review availability: 1 review is currently available. Your included PR review attempts over the past 7 days set your current allowance at 3 reviews per hour. 📝 WalkthroughWalkthroughSingle resident-plane Boolean operations can now feed fused Count and Any folds. The changes add runtime dispatch for all 256 ternlog immediates and size validation bitmaps using the fused slot capacity. Tests, a benchmark probe, and project tracking describe the fold and its stated limits. ChangesTernlog Count and Any folds
Estimated code review effort: 3 (Moderate) | ~25 minutes Suggested reviewers: Merge Risk: ⚪ Minimal · up to The fused fold has no established merge-blocking defect in the supplied evidence. Rerun CI after the declared ndarray dependency is available. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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This is the declared dependency, not a defect in this PR. The two functions arrive in AdaWorldAPI/ndarray#322, and CI checks out ndarray Plan: merge ndarray#322 once its last CI job ( Generated by Claude Code |
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| let mut written = [0u64; 1]; | ||
| validate(program, planes, foreign, out_shape(&out), &mut written)?; |
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When a valid single-op program writes scratch slot 64 or higher, Program::new declares the corresponding slot count and fused_ternlog() recognizes it, but this one-word bitmap cannot mark that destination during validate. The subsequent terminal check therefore returns ScratchReadBeforeWrite instead of executing the fold; for example, an And { dst: 64, ... } followed by Count(Scratch(64)) now requires no allocated scratch but cannot run. Provide validation bookkeeping that can represent the recognized destination index.
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Fixed in ddb2f6e. Valid finding, and it affects both fused branches (the #1268 range fold had the same one-word bitmap). Rather than a 1024-word bitmap (an 8 KB zero-fill on every call, larger than the ~130 ns fold itself), both recognisers now refuse slots >= FUSED_SLOT_CAP (32), and the bitmap is sized from the same constant, so a high-slot program is simply not fused and runs on the tiled path. Regression test a_fusable_shape_on_a_high_slot_still_executes covers both folds, Count and Any, for slots 0..1000 against the reference; it fails with ScratchReadBeforeWrite { slot: 64 } when the cap check is removed.
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Inline comments:
In `@crates/lance-graph-mask-risc/src/exec.rs`:
- Around line 1019-1022: Update the scratch-slot bitmap in both fused execution
branches, including the branch using program.fused_ternlog(), to contain 1024
words so validation can track every u16 destination slot.
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.claude/board/STATUS_BOARD.md.claude/board/entries/2026-09-23-ternlog-count-any-fold.md.claude/board/entries/README.mdcrates/lance-graph-mask-risc/examples/ternlog_fused_probe.rscrates/lance-graph-mask-risc/src/exec.rscrates/lance-graph-mask-risc/src/ir.rscrates/lance-graph-mask-risc/src/lib.rscrates/lance-graph-mask-risc/src/ternlog_dispatch.rscrates/lance-graph-mask-risc/tests/fused_ternlog.rscrates/lance-graph-mask-risc/tools/gen_ternlog_dispatch.py
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…OT_CAP) The fused Range and ternlog paths validate with an on-stack slot bitmap and never touch scratch; a shape naming slot >= 64 was recognised but its destination could not be marked, so Count(Scratch(64)) failed with ScratchReadBeforeWrite. Both recognisers now refuse slots >= 32 and the bitmap is sized from the same constant; such programs run on the tiled path. Regression test covers both folds across slots 0..1000. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GXUahz73MZxtxWcfpHp9dG
Nine STATUS_BOARD rows still read "In PR" or "Queued" for work that has merged. Each flip was checked against origin/main before editing: - D-WFL-FUSE Shipped: single-op #1270, multi-op chains ≤3 planes #1272 - D-WFL-W2b‴ Shipped W2b-A #1268; W2b-B reuse burden stays OPEN - D-WFL-EXTENT Shipped #1269 (`execute_extent`) - D-WFL-T1-FUSED, T1-FUSED′ Shipped (ndarray #322 + #1270) - D-WFL-L0 Shipped #1251 - D-WFL-W2a Shipped #1268: un-gated Pred::Range, Count = hi−lo, Any = lo<hi, zero scratch (`run_fused`) - D-WFL-W2a′ Shipped #1268: `requires_scratch()` derived from the fused lowerings, never a caller flag - D-WFL-2 Partially shipped: range Count/Any landed as a lowering, the `BoundedMask` window is not built Status cells only; every row's description is unchanged, and the old status is kept after "was:" where it carried detail. The row count stays at 2203 lines. Also corrects one exec.rs comment that still described the Boolean fold as "a single 2/3-input op"; since #1272 it collapses whole chains. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GXUahz73MZxtxWcfpHp9dG
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What
A 2- or 3-input Boolean membership over resident planes now ends in Count or Any without writing a mask.
MaskOp::{And, Or, Xor, AndNot, Ternlog}, with all operandsOperand::Planeand folded byCountorAnyof its owndst, is one truth table. The executor folds it straight from the borrowed planes' words.The T1 question (answered in ndarray #322)
Before anything was built, I checked whether the existing
U64x8operations can already do this without touching memory. They can.ternlog,popcnt,+,|andreduce_sumexist in every backend, so no new instruction-level primitive is needed. The only missing piece was the slice loop, and it belongs in T1:mask_ternlog_popcount::<IMM>andmask_ternlog_any::<IMM>. It is one family covering all 256 truth tables, not one function per op. A 2-input op is simply a table that ignoresc.mask-risc changes
Program::fused_ternlog() -> Option<FusedTernlog>. It is derived from the program, likefused_terminal.requires_scratch()now accounts for both.run_fused_ternlog. Whole words go throughternlog_{popcount,any}_dispatch. Each word the extent cuts (at most two) is combined in a one-word register and ANDed withedge_mask.tools/gen_ternlog_dispatch.pynow also emits the two fold dispatchers.--checkpasses, and the arm-count test covers all four entry points.FusedTerminalis unchanged.Keep,All,Not, scratch operands and multi-op programs still take the tiled path.Tests
tests/fused_ternlog.rs:nrows, never the whole last word.Keepcarve.Disable runs (each made after committing, and each failed as it should):
Gates: mask-risc 97/97 passing across 12 test binaries; quack 62/62, unchanged;
clippy -D warningsclean; generator--checkpasses.Benchmark
examples/ternlog_fused_probe.rs, N = 1M rows. Fold vsKeep+popcount_batch_u64, checked against the oracle. The gain is Keep's time ÷ the fold's time.The whole-population Any gains (600–960×) are almost all early exit on dense planes, so they are not a like-for-like cost comparison. The worst case for Any (no hit anywhere) is measured in ndarray #322: 2.6–6.2×.
Board
entries/2026-09-23-ternlog-count-any-fold.md.D-WFL-T1-FUSED,D-WFL-T1-FUSED′(plane∩plane is closed as theAND2table) andD-WFL-FUSE(single-op case).Not in this PR: OQ-5 is untouched. Multi-op trees (
fuse.rs→ one ternlog → this fold) and lane predicate → Count/Any are the next steps, and neither is started.🤖 Generated with Claude Code
https://claude.ai/code/session_01GXUahz73MZxtxWcfpHp9dG
Summary by CodeRabbit
CountandAnycan evaluate supported single-step Boolean combinations directly, without first creating an intermediate mask. This works across whole inputs and requested ranges, including ranges that begin or end partway through a machine word.