INNER CODE UNIT · Python

SwishAuto

digantamisra98/Mish · PyTorch Benchmarks/activations_autofn.py:32

class SwishAuto(nn.Module):
    def __init__(self, inplace: bool = False):
        super(SwishAuto, self).__init__()
        self.inplace = inplace

    def forward(self, x):
        return SwishAutoFn.apply(x)


class MishAutoFn(torch.autograd.Function):
    """Mish: A Self Regularized Non-Monotonic Neural Activation Function - https://arxiv.org/abs/1908.08681
    Experimental memory-efficient variant
    """

    @staticmethod
    def forward(ctx, x):
        ctx.save_for_backward(x)
        y = x.mul(torch.tanh(F.softplus(x)))  # x * tanh(ln(1 + exp(x)))

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