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[ExecuTorch][WebGPU] Add floor_divide op (aten.div.Tensor_mode)#21207

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[ExecuTorch][WebGPU] Add floor_divide op (aten.div.Tensor_mode)#21207
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@JCNTH JCNTH commented Jul 22, 2026

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Stack from ghstack (oldest at bottom):

Adds div.Tensor_mode (floor rounding) as floor(in1 / in2) with NumPy broadcasting, mirroring mul + Vulkan. Only rounding_mode='floor' is supported (fail-loud otherwise).

Key changes:

  • runtime/ops/floor_divide/{BinaryOp.cpp, binary_floor_divide.wgsl} (+ generated _wgsl.h) — floor_divide_impl (args [in1, in2, rounding_mode, out]); broadcast TensorMeta path + dual-operand resize hook (mirrors mul); rounding_mode + int guards.
  • CMakeLists.txtruntime/ops/floor_divide/BinaryOp.cpp in WEBGPU_SRCS.

Differential Revision: D112257613

[ghstack-poisoned]
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pytorch-bot Bot commented Jul 22, 2026

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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/21207

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

❌ 47 New Failures, 3 Unrelated Failures

As of commit 13cd5cd with merge base 266e0dc (image):

NEW FAILURES - The following jobs have failed:

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

  • pull / unittest / windows / windows-job (gh) (matched win rule in flaky-rules.json)
    Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under 'C:\actions-runner\_work\executorch\executorch\test-infra\.github\actions\teardown-windows'. Did you forget to run actions/checkout before running your local action?
  • pull / unittest-editable / windows / windows-job (gh) (matched win rule in flaky-rules.json)
    Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under 'C:\actions-runner\_work\executorch\executorch\test-infra\.github\actions\teardown-windows'. Did you forget to run actions/checkout before running your local action?

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

This comment was automatically generated by Dr. CI and updates every 15 minutes.

This was referenced Jul 22, 2026
This was referenced Jul 22, 2026
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This PR needs a release notes: label

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@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jul 22, 2026
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JCNTH requested a review from psiddh July 23, 2026 02:02

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Approving full WebGPU stack

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