stdarch subtree update #149118

folkertdev · 2025-11-19T23:18:32Z

Subtree update of stdarch to rust-lang/stdarch@50134e1.

Created using https://github.com/rust-lang/josh-sync.

The only interesting commit is the final one, which enables the avx10_target_feature feature in the standard library, because it is now used in stdarch.

r? @sayantn (or whoever, this is just a straightforward sync)

…sics

improve `_mm256_permute2f128` tests

Forward `TEST_SAMPLE_INTRINSICS_PERCENTAGE`

Add intrinsics for the new AMX target features

…sics

This updates the rust-version file to 8401398.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: 8401398 Filtered ref: f9e99a8e85fa360f0e820dc75d46cb4583b4300d Upstream diff: rust-lang/rust@73e6c9e...8401398 This merge was created using https://github.com/rust-lang/josh-sync.

Rustc pull update

previously the output would just always be all zeroes

add logic tests for ternarylogic

Use generic SIMD masked load/stores for avx512 masked load/stores

improve ternary logic tests

Use SIMD intrinsics for vector shifts

ARM has withdrawn FEAT_TME https://developer.arm.com/documentation/102105/lb-05/ LLVM has also dropped support for enabling the feature.

correct some `#[simd_test]` attributes

aarch64: Remove withdrawn FEAT_TME

…h-to-main rename default branch to main

…dness correct signedness of pmadd arguments

rustbot · 2025-11-19T23:18:36Z

stdarch is developed in its own repository. If possible, consider making this change to rust-lang/stdarch instead.

cc @Amanieu, @folkertdev, @sayantn

tgross35 · 2025-11-20T00:31:47Z

@bors r+ rollup=never p=1

bors · 2025-11-20T00:31:50Z

📌 Commit ae682a3 has been approved by tgross35

It is now in the queue for this repository.

Zalathar · 2025-11-20T01:09:10Z

@bors ping

bors · 2025-11-20T01:09:12Z

😪 I'm awake I'm awake

Zalathar · 2025-11-20T01:09:56Z

Bors, please start running jobs.

@bors retry

stdarch subtree update Subtree update of `stdarch` to rust-lang/stdarch@50134e1. Created using https://github.com/rust-lang/josh-sync. The only interesting commit is the final one, which enables the `avx10_target_feature` feature in the standard library, because it is now used in `stdarch`. r? `@sayantn` (or whoever, this is just a straightforward sync)

bors · 2025-11-20T01:10:31Z

⌛ Testing commit ae682a3 with merge 82e8d6a...

bors · 2025-11-20T03:37:31Z

💔 Test failed - checks-actions

folkertdev · 2025-11-20T09:37:47Z

Github won't show me the actual cause, but I think this is just a spurious failure in dist-x86_64-msvc

@bors retry

bors · 2025-11-20T10:08:28Z

⌛ Testing commit ae682a3 with merge 2c0f486...

tgross35 · 2025-11-20T10:42:43Z

For reference, you can see what happened if you expand the thing at the top for that job

bors · 2025-11-20T13:24:08Z

☀️ Test successful - checks-actions
Approved by: tgross35
Pushing 2c0f486 to main...

github-actions · 2025-11-20T13:27:08Z

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing 683dd08 (parent) -> 2c0f486 (this PR)

Test differences

Show 2 test diffs

2 doctest diffs were found. These are ignored, as they are noisy.

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 2c0f4860cc86e2354a55ea04e738848168435c90 --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

aarch64-apple: 14713.9s -> 8168.0s (-44.5%)
dist-aarch64-apple: 7260.7s -> 5728.5s (-21.1%)
x86_64-rust-for-linux: 3068.5s -> 2424.8s (-21.0%)
x86_64-gnu-llvm-20: 2858.2s -> 2314.1s (-19.0%)
x86_64-gnu-llvm-21-2: 5977.4s -> 5125.2s (-14.3%)
aarch64-gnu-llvm-20-2: 2471.2s -> 2175.8s (-12.0%)
x86_64-gnu-tools: 3700.1s -> 3259.0s (-11.9%)
x86_64-gnu-llvm-21-3: 6955.7s -> 6188.3s (-11.0%)
pr-check-1: 1963.5s -> 1754.8s (-10.6%)
dist-x86_64-apple: 7955.4s -> 7182.5s (-9.7%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

rust-timer · 2025-11-20T14:43:43Z

Finished benchmarking commit (2c0f486): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.8%	[-0.8%, -0.8%]	2
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary -2.4%, secondary 2.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.0%	[2.0%, 2.0%]	1
Improvements ✅ (primary)	-2.4%	[-2.4%, -2.4%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.4%	[-2.4%, -2.4%]	1

Cycles

Results (secondary 0.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.7%	[2.8%, 5.0%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.9%	[-4.4%, -3.6%]	4
All ❌✅ (primary)	-	-	0

Binary size

Results (primary 0.0%, secondary 0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.0%	[0.0%, 0.0%]	12
Regressions ❌ (secondary)	0.0%	[0.0%, 0.0%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.0%	[0.0%, 0.0%]	12

Bootstrap: 470.773s -> 471.681s (0.19%)
Artifact size: 388.83 MiB -> 388.90 MiB (0.02%)

folkertdev and others added 29 commits October 27, 2025 00:28

forward TEST_SAMPLE_INTRINSICS_PERCENTAGE

d2a2fd3

intrinsic-test: display more logs in CI

d618085

Add AMX intrinsics

48116cf

Patch stdarch_verify to not check intel definition for new AMX intrin…

2815023

…sics

Add tests for new AMX intrinsics

17c3f8a

improve _mm256_permute2f128 tests

f9dc790

Merge pull request rust-lang#1951 from folkertdev/permute2f128-tests

ff78b84

improve `_mm256_permute2f128` tests

Merge pull request rust-lang#1948 from folkertdev/forward-percentage

8dc0761

Forward `TEST_SAMPLE_INTRINSICS_PERCENTAGE`

Merge pull request rust-lang#1846 from sayantn/new-amx-intrinsics

5914877

Add intrinsics for the new AMX target features

Use generic SIMD masked load/stores for avx512 masked load/stores

9126145

Use generic SIMD intrinsics for AVX maskload and maskstore intrin…

7ea8483

…sics

Prepare for merging from rust-lang/rust

83e4d81

This updates the rust-version file to 8401398.

Merge pull request rust-lang#1954 from rust-lang/rustc-pull

c610b1d

Rustc pull update

rename default branch to main

1b3abfe

add logic tests for ternarylogic

148a750

previously the output would just always be all zeroes

Merge pull request rust-lang#1958 from folkertdev/ternary-logic-tests

b851387

add logic tests for ternarylogic

improve ternary logic tests

e94ac6b

Merge pull request rust-lang#1953 from sayantn/masked-load-store

849ace0

Use generic SIMD masked load/stores for avx512 masked load/stores

Use SIMD intrinsics for vector shifts

0ab7c9e

Merge pull request rust-lang#1959 from folkertdev/ternary-logic-tests-2

84c44c4

improve ternary logic tests

Merge pull request rust-lang#1955 from sayantn/vector-shifts

d84c695

Use SIMD intrinsics for vector shifts

aarch64: Remove withdrawn FEAT_TME

0882a6e

ARM has withdrawn FEAT_TME https://developer.arm.com/documentation/102105/lb-05/ LLVM has also dropped support for enabling the feature.

correct some #[simd_test] attributes

8fe87e9

Merge pull request rust-lang#1956 from sayantn/fix-tests

7f3fcb3

correct some `#[simd_test]` attributes

Merge pull request rust-lang#1960 from maurer/remove-tme

57436fe

aarch64: Remove withdrawn FEAT_TME

correct signedness of pmadd arguments

ac2d972

Merge pull request rust-lang#1957 from marcoieni/rename-default-branc…

2788686

…h-to-main rename default branch to main

Merge pull request rust-lang#1961 from folkertdev/pmadd-correct-signe…

2922cbd

…dness correct signedness of pmadd arguments

rustbot added the A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. label Nov 19, 2025

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enable avx10_target_feature in core (used by stdarch)

ae682a3

folkertdev force-pushed the stdarch-sync-2025-11-19 branch from de75473 to ae682a3 Compare November 19, 2025 23:28

folkertdev mentioned this pull request Nov 19, 2025

josh sync stdarch #149117

Closed

rustbot assigned sayantn Nov 19, 2025

folkertdev changed the title ~~stdarch subtree update (test)~~ stdarch subtree update Nov 19, 2025

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Nov 20, 2025

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Nov 20, 2025

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Nov 20, 2025

bors added the merged-by-bors This PR was explicitly merged by bors. label Nov 20, 2025

bors merged commit 2c0f486 into rust-lang:main Nov 20, 2025
12 checks passed

rustbot added this to the 1.93.0 milestone Nov 20, 2025

stdarch subtree update #149118

stdarch subtree update #149118

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Test differences

Job duration changes

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rust-timer commented Nov 20, 2025

Overall result: ✅ improvements - no action needed

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folkertdev commented Nov 19, 2025 •

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