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fix overflow and undeflow for @fastmath exp #42747

Merged
merged 3 commits into from
Oct 22, 2021
Merged

fix overflow and undeflow for @fastmath exp #42747

merged 3 commits into from
Oct 22, 2021

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oscardssmith
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Before

julia> @fastmath exp(1000.0)
-6.096081764721242e-183

julia> @fastmath exp(-1000.0)
-1.6403979450983092e182

After

julia> @fastmath exp(1000.0)
Inf

julia> @fastmath exp(-1000.0)
0.0

@oscardssmith oscardssmith added maths Mathematical functions bugfix This change fixes an existing bug backport 1.7 labels Oct 21, 2021
@vtjnash vtjnash added the merge me PR is reviewed. Merge when all tests are passing label Oct 21, 2021
@giordano
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Add tests maybe?

@dehann dehann mentioned this pull request Oct 21, 2021
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@DilumAluthge DilumAluthge merged commit 609a4a0 into JuliaLang:master Oct 22, 2021
@DilumAluthge DilumAluthge removed the merge me PR is reviewed. Merge when all tests are passing label Oct 22, 2021
@oscardssmith oscardssmith deleted the fix-fastmath-exp-overflow branch October 22, 2021 11:56
KristofferC pushed a commit that referenced this pull request Oct 22, 2021
@oscardssmith @KristofferC
fix overflow and undeflow for @fastmath exp (#42747)
448072f 
Co-authored-by: oscarddssmith <oscar.smith@juliacomputing.com>
(cherry picked from commit 609a4a0)
@KristofferC KristofferC mentioned this pull request Oct 22, 2021
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LilithHafner pushed a commit to LilithHafner/julia that referenced this pull request Feb 22, 2022
@oscardssmith @LilithHafner
fix overflow and undeflow for @fastmath exp (JuliaLang#42747)
980e66c 
Co-authored-by: oscarddssmith <oscar.smith@juliacomputing.com>
LilithHafner pushed a commit to LilithHafner/julia that referenced this pull request Mar 8, 2022
@oscardssmith @LilithHafner
fix overflow and undeflow for @fastmath exp (JuliaLang#42747)
56de9c4 
Co-authored-by: oscarddssmith <oscar.smith@juliacomputing.com>
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5 participants
@oscardssmith @giordano @vtjnash @KristofferC @DilumAluthge