 = 0.5 * x * (1 + erf(x / sqrt(2)))`, where P(X) ~ N(0, 1),
depending on whether approximation is enabled.
See [Gaussian Error Linear Units (GELUs)](https://arxiv.org/abs/1606.08415)
and [BERT: Pre-training of Deep Bidirectional Transformers for Language Understanding](https://arxiv.org/abs/1810.04805).</p>
    <h2 class="hasAnchor" id="computes-gaussian-error-linear"><a class="anchor" href="#computes-gaussian-error-linear"></a>Computes gaussian error linear</h2>

    

<p>`0.5 * x * (1 + tanh(sqrt(2 / pi) 