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Improve accuracy of asinh and acosh #104553

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merged 1 commit into from Nov 19, 2022
Merged

Improve accuracy of asinh and acosh #104553

merged 1 commit into from Nov 19, 2022

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mwillsey
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This PR addresses the inaccuracy of asinh and acosh identified by the Herbie tool, @pavpanchekha, @finnbear in #104548. It also adds a couple tests that failed in the existing implementations and now pass.

Closes #104548

r? rust-lang/libs

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rustbot commented Nov 17, 2022

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @m-ou-se (or someone else) soon.

Please see the contribution instructions for more information.

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Nov 17, 2022
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rustbot commented Nov 17, 2022

Hey! It looks like you've submitted a new PR for the library teams!

If this PR contains changes to any rust-lang/rust public library APIs then please comment with @rustbot label +T-libs-api -T-libs to tag it appropriately. If this PR contains changes to any unstable APIs please edit the PR description to add a link to the relevant API Change Proposal or create one if you haven't already. If you're unsure where your change falls no worries, just leave it as is and the reviewer will take a look and make a decision to forward on if necessary.

Examples of T-libs-api changes:

  • Stabilizing library features
  • Introducing insta-stable changes such as new implementations of existing stable traits on existing stable types
  • Introducing new or changing existing unstable library APIs (excluding permanently unstable features / features without a tracking issue)
  • Changing public documentation in ways that create new stability guarantees
  • Changing observable runtime behavior of library APIs

@finnbear finnbear mentioned this pull request Nov 17, 2022
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thomcc commented Nov 18, 2022 •
edited

I'm somewhat surprised we aren't just calling into OS-provided functions here, but I guess those may not be in all platform libms.

Either way I don't mind approving this (I think @m-ou-se is fairly busy, sorry if you wanted to review tho), since these implementations are clearly mathematically equivalent to the old versions, and to the abstract definitions of these functions.

@bors r+

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bors commented Nov 18, 2022

📌 Commit 26b23f4 has been approved by thomcc

It is now in the queue for this repository.

@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 Nov 18, 2022
@Dylan-DPC Dylan-DPC mentioned this pull request Nov 19, 2022
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bors added a commit to rust-lang-ci/rust that referenced this pull request Nov 19, 2022
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Auto merge of rust-lang#104600 - Dylan-DPC:rollup-glw1e8b, r=Dylan-DPC
2f8d804 
Rollup of 8 pull requests

Successful merges:

 - rust-lang#104001 (Improve generating Custom entry function)
 - rust-lang#104411 (nll: correctly deal with bivariance)
 - rust-lang#104528 (Properly link `{Once,Lazy}{Cell,Lock}` in docs)
 - rust-lang#104553 (Improve accuracy of asinh and acosh)
 - rust-lang#104554 (Use `ErrorGuaranteed::unchecked_claim_error_was_emitted` less)
 - rust-lang#104566 (couple of clippy::perf fixes)
 - rust-lang#104575 (deduplicate tests)
 - rust-lang#104580 (diagnostics: only show one suggestion for method -> assoc fn)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 45bfb1c into rust-lang:master Nov 19, 2022
@rustbot rustbot added this to the 1.67.0 milestone Nov 19, 2022
@Mrmaxmeier Mrmaxmeier mentioned this pull request Jan 26, 2023
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Arc-hyperbolic-trigonometric functions are very inaccurate
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