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Fix failure in GEBP kernel when compiling with OpenMP and FMA

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Fixes #1995
This commit is contained in:
David Tellenbach 2020-09-30 01:26:07 +02:00
parent f9d1500f74
commit 30960d485e
1 changed files with 2 additions and 1 deletions
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Eigen/src/Core/products/GeneralBlockPanelKernel.h
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@ -156,7 +156,8 @@ void evaluateProductBlockingSizesHeuristic(Index& k, Index& m, Index& n, Index n
// registers. However once the latency is hidden there is no point in
// increasing the value of k, so we'll cap it at 320 (value determined
// experimentally).
const Index k_cache = (numext::mini<Index>)((l1-ksub)/kdiv, 320);
// To avoid that k vanishes, we make k_cache at least as big as kr
const Index k_cache = numext::maxi<Index>(kr, (numext::mini<Index>)((l1-ksub)/kdiv, 320));
if (k_cache < k) {
k = k_cache - (k_cache % kr);
eigen_internal_assert(k > 0);