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Diffstat (limited to 'compute/cker/include/cker/operation/Logistic.h')
| -rw-r--r-- | compute/cker/include/cker/operation/Logistic.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/compute/cker/include/cker/operation/Logistic.h b/compute/cker/include/cker/operation/Logistic.h index 3d3e59e55..e9907729e 100644 --- a/compute/cker/include/cker/operation/Logistic.h +++ b/compute/cker/include/cker/operation/Logistic.h @@ -29,12 +29,39 @@ namespace nnfw namespace cker { +/** + * @brief Internal scalar_logistic_op operation struct + * + * @note Recent Eigen3 scalar_logistic_op return invalid value on ARM32 if + * input value is float type 88 (expected: 1, actual: 0) + * As a workaround, we use old version scalar_logistic_op internal struct + * TODO Remove this workaround + */ +template <typename T> struct scalar_logistic_op +{ + EIGEN_EMPTY_STRUCT_CTOR(scalar_logistic_op) + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T operator()(const T &x) const + { + const T one = T(1); + return one / (one + Eigen::numext::exp(-x)); + } + + template <typename Packet> + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet packetOp(const Packet &x) const + { + const Packet one = Eigen::internal::pset1<Packet>(T(1)); + return pdiv(one, padd(one, pexp(pnegate(x)))); + } +}; + inline void Logistic(const Shape &input_shape, const float *input_data, const Shape &output_shape, float *output_data) { auto input_map = MapAsVector(input_data, input_shape); auto output_map = MapAsVector(output_data, output_shape); - output_map.array() = input_map.array().unaryExpr(Eigen::internal::scalar_logistic_op<float>()); + + // Use old version scalar_logistic_op + output_map.array() = input_map.array().unaryExpr(nnfw::cker::scalar_logistic_op<float>()); } } // namespace cker |