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enable i8mm target feature on aarch64 and arm#90079

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SparrowLii:i8mm
Oct 25, 2021
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enable i8mm target feature on aarch64 and arm#90079
bors merged 2 commits intorust-lang:masterfrom
SparrowLii:i8mm

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@SparrowLii SparrowLii commented Oct 20, 2021

As in rust-lang/stdarch#1233, i8mm needs to be turned on to support the implementation of vmmla and vusmmlaneon instructions in stdarch.
r? @Amanieu

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SparrowLii commented Oct 20, 2021 •
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It seems that i8mm is still unavailable. In this case, we may not be able to support commands such as vmmla in stdarch for the time being.

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hkratz commented Oct 20, 2021 •
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It seems that i8mm is still unavailable. In this case, we may not be able to support commands such as vmmla in stdarch for the time being.

It seems that LLVM 11 has support for i8mm, so once #90062 has landed this can go forward.

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Amanieu commented Oct 20, 2021

It's rather unfortunate that we don't have a proper way of extracting a list of supported features from LLVM. The current hack causes LLVM to print a message to stderr if a feature doesn't exist.

@Amanieu Amanieu mentioned this pull request Oct 21, 2021
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hkratz commented Oct 25, 2021

Minimum required LLVM version is now 12, so this can go in IMHO - #90175.

@SparrowLii SparrowLii changed the title enable i8mm target feature on aarch64 enable i8mm target feature on aarch64 and arm Oct 25, 2021
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SparrowLii commented Oct 25, 2021

It seems that the i8mm feature can already be turned on on aarch64 and arm.
@Amanieu Can this PR be merged?

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Amanieu commented Oct 25, 2021

@bors r+ rollup

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bors commented Oct 25, 2021

📌 Commit b88fcc1 has been approved by Amanieu

@bors 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 Oct 25, 2021
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Oct 25, 2021
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Rollup merge of rust-lang#90079 - SparrowLii:i8mm, r=Amanieu
fec654e 
enable `i8mm` target feature on aarch64 and arm

As in rust-lang/stdarch#1233, `i8mm` needs to be turned on to support the implementation of `vmmla` and `vusmmla`neon instructions in stdarch.
r? `@Amanieu`
This was referenced Oct 25, 2021
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bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 25, 2021
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Auto merge of rust-lang#90265 - GuillaumeGomez:rollup-gx3ficp, r=Guil…
84c2a85 
…laumeGomez

Rollup of 5 pull requests

Successful merges:

 - rust-lang#90017 (Add a couple tests for normalize under binder issues)
 - rust-lang#90079 (enable `i8mm` target feature on aarch64 and arm)
 - rust-lang#90233 (Tooltip overflow)
 - rust-lang#90257 (Changed slice.swap documentation for better readability)
 - rust-lang#90261 (Move back to linux builder on try builds)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit bd48b99 into rust-lang:master Oct 25, 2021
@rustbot rustbot added this to the 1.58.0 milestone Oct 25, 2021
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