open-standards/wai/quantum-conformance/fabric/expected.json
Transaction Science 897ab7d808 wai-quantum WebGPU member: tile review fixes
From an independent review of the tile implementation (no input gave wrong
bits); each finding fixed:

- expected.json is authoritative: tests/fabric_expected.rs (excluded from the
  package, so publishing is unaffected; cargo drops its target and verification
  builds the library only) requires quantum-conformance/fabric/expected.json to
  be exactly the four certificates of the pinned corpora (gateset, corpus, seed,
  cases, wide circuits, the digest the CPU computes) and both implementation ids;
  a missing file fails. The browser job runs it in place of the grep step, whose
  comment now says what is checked. A copy giving fabric-v1 random-v1's digests
  fails it.
- The checker's step 6 adds a uniformity taint check: a barrier must not sit
  under a condition, or after a return, break or continue under a condition,
  that depends on the invocation's ids or on memory other invocations write
  (read-write storage, workgroup memory, atomics), directly or through a
  variable or a call. Uniform buffers, read-only storage, buffer lengths and
  the workgroup id, count and size are uniform. Planted early returns on
  local_invocation_index (the reviewer's variant among them), on a read-write
  load, through a variable and through a call each fail; the real shaders pass.
- The tile kernel refuses a run record (bit 4, nothing touched) unless its
  tiles cover each state plane exactly and its grid (num_workgroups, one deep)
  holds every tile once with x_groups to a row. The tile implementation id is
  now wgsl-lanes32-tile/54e443520c020013, re-pinned in wgsl.rs and
  expected.json.
- PlannedGate::is_well_formed: diag must match the words and the op index must
  not be u32::MAX (the tile kernel's "no op"). plan::execute_from returns None
  and the member refuses Internal(4) otherwise; compile never makes either.
- The member splits a tile step into dispatches of at most SUBMIT_BUDGET
  pair-updates (splitting a run is exact), so every submission keeps the budget
  the module and POLL_TIMEOUT documents state.
- g12 adds, for the tile member: starts other than zero; a first out-of-range
  op in a later submission with circuit/1 P(19) as filler (never skipped); a
  600-gate run at 20 qubits that the member splits; ill-formed planned gates
  refused by both implementations; and, inside WAI_QUANTUM_WEBGPU_WIDE only,
  the widest sizes (run cap 16, grid (8, 8192) at 26 qubits), which the member
  script then requires.
- Placement's tie order is documented as it is: with both implementations'
  entries for one member and no energy figures, place picks the tile
  implementation (its name sorts first); discovery opens per-gate members,
  which are the fallback. A test pins the order.
- wai/wai-web/src/lib.rs is in the workflow's paths; the wasip2 job requires
  the new unit test by name.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-11 23:12:21 -04:00

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{
"implementation": "wgsl-lanes32/dc8e19f61e0e87ab",
"tile_implementation": "wgsl-lanes32-tile/54e443520c020013",
"certificates": [
{
"gateset": 1,
"kernel": "wai.quantum.circuit/apply",
"corpus": "random-v1",
"seed": 7,
"cases": 200,
"wide": 0,
"cases_compared": 200,
"corpus_hex": "d18454c639acfd9c7b66450f4ded1aac4ab46cc10a7bedbcf4958a96e204fb36"
},
{
"gateset": 2,
"kernel": "wai.quantum.circuit2/apply",
"corpus": "random-v1",
"seed": 7,
"cases": 200,
"wide": 0,
"cases_compared": 200,
"corpus_hex": "3dbde276c1095bf827faec71d5980e050f8a55a5ba7d97cd3bbdaec3f43a13b2"
},
{
"gateset": 1,
"kernel": "wai.quantum.circuit/apply",
"corpus": "fabric-v1",
"seed": 7,
"cases": 200,
"wide": 24,
"cases_compared": 224,
"corpus_hex": "41c726a0ac80f7defef92e15ecf893bdb7a3076b5e7f670fa0b7142e5c033df7"
},
{
"gateset": 2,
"kernel": "wai.quantum.circuit2/apply",
"corpus": "fabric-v1",
"seed": 7,
"cases": 200,
"wide": 24,
"cases_compared": 224,
"corpus_hex": "9a84b55af68f1a8b07390b234cf562dd8d85cef3185a697ab85690c8790a7809"
}
]
}