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Support multidimensional Rust Load and Store blocks - #12102

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tpn wants to merge 67 commits into
NVIDIA:mainfrom
tpn:codex/cuda-coop-rust-block-shapes
Closed

tpn wants to merge 67 commits into
NVIDIA:mainfrom
tpn:codex/cuda-coop-rust-block-shapes

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@tpn

@tpn tpn commented Oct 20, 2026 •

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Superseded by #12088, which now owns this implementation within its complete feature family. The original commits, branch and validation evidence remain available. This draft is closed unmerged.


Historical scope and validation below refer to the original source heads.

Rust Load and Store preserve the full block shape, so Direct and Transpose work with one-, two- and three-dimensional blocks, including (11, 3, 1) and (8, 4, 4). CUB receives all three axes; payload values and validity bits use x-fastest thread rank. Launch preparation rejects a different shape even when the total thread count matches. Existing one-dimensional constructors remain supported.

Compiler pins and lockfiles target the qualified Rust 1.99.1 toolchain. Owning validation passes: host tests, strict lints/docs and provider MSRV 1.85; 24 raw and 264 typed native requests; the 59-root DEV fixture checking 1,093 Direct and 1,305 Transpose cases; six sanitizer commands and ten expected traps, each followed by a successful health replay. Four private compiler controls pass (one accept, three rejects); the unchanged 20 public controls retain their Transpose evidence. CUBIN metadata matches all three axes and queried scratch layouts. Whole CUBINs differ from historical builds; no performance claim is made. Exact-head Rust host CI and all upstream checks pass.

Builds on #12101. The PR diff against main is cumulative; the immutable owning comparison above Transpose isolates this layer.

tpn added 30 commits October 19, 2026 21:39
Create a host-only Cargo workspace that specializes selected CUB forms
through NVRTC and reports exact scratch layouts with their LTO output.
Bind specialization identities to source, headers and toolkit bytes.
Include a runnable provider example, Rust guide and CPU checks.

Signed-off-by: Trent Nelson <trent@trent.me>
Install the pinned toolchain without updating rustup itself.

Signed-off-by: Trent Nelson <trent@trent.me>
Serve native specialization batches through the versioned Oxide boundary
and exercise Load and Store through a standalone Cargo consumer with a
generic helper dependency.

Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Reuse the same helper sites with 64- and 128-thread kernels and retain

one device static across their emitted bodies. Check each launch plan

and preserve fixed external-symbol diagnostics.

Signed-off-by: Trent Nelson <trent@trent.me>
Select fixture output locations from raw CUDA coordinates and exercise
payload initialization, access and copying at both item counts. Annotate
compile-fail examples and clarify hierarchy ordering in the guide.

Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>

# Conflicts:
#	rust/Cargo.lock
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Signed-off-by: Trent Nelson <trent@trent.me>
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tpn added 2 commits October 20, 2026 12:38
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
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Auto-sync is disabled for draft pull requests in this repository. Workflows must be run manually.

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@github-project-automation github-project-automation Bot moved this to Todo in CCCL Oct 20, 2026
@cccl-authenticator-app cccl-authenticator-app Bot moved this from Todo to In Progress in CCCL Oct 20, 2026
tpn added 19 commits October 23, 2026 08:33
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Keep the owning implementation and tests unchanged while applying
its scoped compiler, lock and documentation compatibility updates.

Signed-off-by: Trent Nelson <trent@trent.me>
Resolve artifact metadata from the pinned compiler source.
Keep the owning implementation and dependency versions unchanged.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Record the existing provider build dependency in the query lock.
Keep implementation and third-party dependency records unchanged.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Use the existing compiler diagnostic for three original cases.
Keep their program bodies and all other expectations unchanged.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
Use the current compiler diagnostic for the original case.
Keep its program body and all other expectations unchanged.

Signed-off-by: Trent Nelson <trent@trent.me>
Merge the corrected prerequisite while preserving this owner.

Signed-off-by: Trent Nelson <trent@trent.me>
@tpn tpn closed this Oct 24, 2026
@github-project-automation github-project-automation Bot moved this from In Progress to Done in CCCL Oct 24, 2026
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