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  • #1259
Closed
Open
Created Dec 04, 2019 by Eigen Bugzilla@eigenbzReporter

Avoid conflicts with Intel Short Vector Math Library

Submitted by Gael Guennebaud @ggael

Assigned to Nobody

Link to original bugzilla bug (#1259)
Version: 3.4 (development)
Platform: x86 - general

Description

Recent Intel's compiler are able to automatically vectorize math functions such as cos, exp, etc. through calls to SVML. Apparently, SVML versions are faster than ours, and therefore disabling Eigen's vectorization might lead to faster code...

One possible strategy would be to perform ourself explicit calls to SVML in our pexp, p* functions when the user compiles with -DEIGEN_USE_SVML.

Blocking

#1687

Edited Dec 05, 2019 by Eigen Bugzilla
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