INNER CODE UNIT · Python

_trunc_exp

junshutang/Make-It-3D · activation.py:5

class _trunc_exp(Function):
    @staticmethod
    @custom_fwd(cast_inputs=torch.float)
    def forward(ctx, x):
        ctx.save_for_backward(x)
        return torch.exp(x)

    @staticmethod
    @custom_bwd
    def backward(ctx, g):
        x = ctx.saved_tensors[0]
        return g * torch.exp(x.clamp(max=15))

trunc_exp = _trunc_exp.apply

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