| [eigen-commits] commit/eigen: 2 new changesets |
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- To: eigen-commits@xxxxxxxxxxxxxxxxxxx
- Subject: [eigen-commits] commit/eigen: 2 new changesets
- From: Bitbucket <commits-noreply@xxxxxxxxxxxxx>
- Date: Thu, 22 Aug 2019 00:25:39 +0000 (UTC)
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2 new commits in eigen:
https://bitbucket.org/eigen/eigen/commits/93df5ef54dfd/
Changeset: 93df5ef54dfd
User: rmlarsen
Date: 2019-08-12 20:53:28+00:00
Summary: Implement vectorized versions of log1p and expm1 in Eigen using Kahan's formulas, and change the scalar implementations to properly handle infinite arguments.
Depending on instruction set, significant speedups are observed for the vectorized path:
log1p wall time is reduced 60-93% (2.5x - 15x speedup)
expm1 wall time is reduced 0-85% (1x - 7x speedup)
The scalar path is slower by 20-30% due to the extra branch needed to handle +infinity correctly.
Full benchmarks measured on Intel(R) Xeon(R) Gold 6154 here: https://bitbucket.org/snippets/rmlarsen/MXBkpM
Affected #: 9 files
https://bitbucket.org/eigen/eigen/commits/ce9508807f3f/
Changeset: ce9508807f3f
User: rmlarsen
Date: 2019-08-22 00:25:29+00:00
Summary: Merged in rmlarsen/eigen (pull request #680)
Implement vectorized versions of log1p and expm1 in Eigen using Kahan's formulas, and change the scalar implementations to properly handle infinite arguments.
Affected #: 9 files
Repository URL: https://bitbucket.org/eigen/eigen/
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