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Merge pull request #23860 from fengyuentau:fix_overflow_sigmoid_v3.4

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dnn: fix overflow in sigmoid layer for 3.4
This commit is contained in:
Alexander Smorkalov
2023-06-23 19:47:42 +03:00
committed by GitHub
parent d4f81c6d24 29388f80a5
commit d9a5603fa3
1 changed files with 8 additions and 1 deletions
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modules/dnn/src/layers/elementwise_layers.cpp
+8 -1
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@@ -680,7 +680,14 @@ struct SigmoidFunctor : public BaseDefaultFunctor<SigmoidFunctor>
inline float calculate(float x) const
{
return 1.f / (1.f + exp(-x));
float y;
if (x >= 0)
y = 1.f / (1.f + exp(-x));
else {
y = exp(x);
y = y / (1 + y);
}
return y;
}
#ifdef HAVE_HALIDE