Add fast tanh and fast sigmoid to LSTM #43
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sdatkinson
approved these changes
May 27, 2023
| @@ -32,6 +32,12 @@ inline float fast_tanh(const float x) | |||
| / (2.44506634652299f + (2.44506634652299f + x2) * fabsf(x + 0.814642734961073f * x * ax))); | |||
| } | |||
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| inline float fast_sigmoid(const float x) | |||
| { | |||
| return 0.5f * (fast_tanh(x * 0.5f) + 1.0f); | |||
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This PR adds fast tanh and fast sigmoid activation for LSTM models. It keys off of the enable_fast_tanh()/disable_fast_tanh() methods.
My testing indicates around a 40% performance improvement for LSTM models.