Who contributed to Google on September 7, 2026?

3 developers shipped this update, including Sergei Lebedev, copybara-service, and jax authors.

What were the notable Google updates?

[mosaic_gpu] Removed unused `_tmem_addr_to_ptr`, Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types, and Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types.

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Sep 7, 2026

$ the-wire · showcase

Mosaic GPU cleanup plus neg_p alignment in JAX

By RepoJournal · Filed 06:58 UTC on September 7, 2026 · About Google

3 people shipped this

Sergei Lebedev @superbobry 2 cited

copybara-service @copybara-service 1 cited

jax authors @Google-ML-Automation 1 cited

JAX's Mosaic GPU backend drops dead code while the team aligns neg_p lowering between Lane and WG semantics for floating types.

JAX's Mosaic GPU backend removed the unused `_tmem_addr_to_ptr` helper [1]. The removal pairs with the alignment of `lax.neg_p` lowering between Lane and WG semantics for floating types [2][3]. The change ensures consistent behavior across the two semantics for floating-point negation.

Additionally, the XLA dependency was updated to revision 3e8c82faf8a5afe3583beed85503cc117adb89d9 [4]. This keeps JAX on a recent XLA snapshot.

Action items

→ Monitor if your code relies on neg_p lowering differences between Lane and WG semantics google/jax [monitor]

References

[1] [mosaic_gpu] Removed unused `_tmem_addr_to_ptr` ↗ google/jax
[2] Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types ↗ google/jax
[3] Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types ↗ google/jax
[4] Update XLA dependency to use revision http://github.com/openxla/xla/commit/3e8c82faf8a5afe3583beed85503cc117adb89d9 ↗ google/jax

$ ls google/reviews/ # the step-back reads

the week in review JAX free-threading push dominates the week the month in review JAX ships 0.11.1 and reworks custom_vjp, Cloud Python hardens Spanner

Topics: AI / ML Python Full archive →

Quick answers

What shipped in Google on September 7, 2026?: JAX's Mosaic GPU backend drops dead code while the team aligns neg_p lowering between Lane and WG semantics for floating types. In total, 3 commits and 2 pull requests landed.
Who contributed to Google on September 7, 2026?: 3 developers shipped this update, including Sergei Lebedev, copybara-service, and jax authors.
What were the notable Google updates?: [mosaic_gpu] Removed unused `_tmem_addr_to_ptr`, Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types, and Aligned the lowering of `lax.neg_p` between Lane and WG semantics for floating types.

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$ log Google --recent

2026-09-06 JAX pins XLA to new revision 1 shipped 2026-09-05 JAX ships thread-safe PyArray, changes jax.jit inline semantics 68 shipped 2026-09-04 JAX removes deprecated Pallas APIs, adds barrier-skip for multi-device calls 83 shipped 2026-09-03 Bigtable reroutes CheckAndMutateRows and ReadModifyWriteRows 91 shipped

$ log --all # elsewhere on the wire

Meta 2026-09-07 React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic 2026-09-07 Pydantic fixes Mypy plugin crash, tightens datetime constraints

$ ls showcases/

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