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Merged in rmlarsen/eigen (pull request PR-618)

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Make clipping outside [-18:18] consistent for vectorized and non-vectorized paths of scalar_logistic_op<float>.

Approved-by: Gael Guennebaud <g.gael@free.fr>
This commit is contained in:
Rasmus Larsen 2019-03-18 15:51:55 +00:00
commit 5c93b38c5f
1 changed files with 3 additions and 2 deletions
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Eigen/src/Core/functors/UnaryFunctors.h
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@ -927,8 +927,9 @@ template <>
struct scalar_logistic_op<float> { struct scalar_logistic_op<float> {
EIGEN_EMPTY_STRUCT_CTOR(scalar_logistic_op) EIGEN_EMPTY_STRUCT_CTOR(scalar_logistic_op)
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float operator()(const float& x) const { EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float operator()(const float& x) const {
const float one = 1.0f; if (x < -18.0f) return 0.0f;
return one / (one + numext::exp(-x)); else if (x > 18.0f) return 1.0f;
else return 1.0f / (1.0f + numext::exp(-x));
} }
template <typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE template <typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE