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Replace VectorXx.Exp's edge case fallback with scalar processing - #107886

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stephentoub merged 2 commits into
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stephentoub:fixexpvect
Sep 18, 2024
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Replace VectorXx.Exp's edge case fallback with scalar processing#107886
stephentoub merged 2 commits into
dotnet:mainfrom
stephentoub:fixexpvect

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@stephentoub

@stephentoub stephentoub commented Sep 16, 2024

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The better, vectorized fix is more complex and can be done for .NET 10.

Fixes #107838

Easiest to review with whitespace hidden: https://github.com/dotnet/runtime/pull/107886/files?diff=split&w=1

The better, vectorized fix is more complex and can be done for .NET 10.

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Thank you!

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After hitting Approve, I noticed there's a failing test for the special values.

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/backport to release/9.0-rc2

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Started backporting to release/9.0-rc2: https://github.com/dotnet/runtime/actions/runs/10909076272

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stephentoub merged commit 24e7d1b into dotnet:main Sep 18, 2024
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stephentoub deleted the fixexpvect branch September 18, 2024 02:56
sirntar pushed a commit to sirntar/runtime that referenced this pull request Sep 30, 2024
…net#107886)

* Replace VectorXx.Exp's edge case fallback with scalar processing

The better, vectorized fix is more complex and can be done for .NET 10.

* Revert addition to Helpers.IsEqualWithTolerance
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The better, vectorized fix is more complex and can be done for .NET 10.

do you guys remember this or should i create an issue for it?

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TensorPrimitives.Exp<double> returns negative infinity instead of 0 for doubles between approximately -709.5 and -709.7

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