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fixed layer_norm #456

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fixed layer_norm #456

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9 changes: 5 additions & 4 deletions clip/model.py
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Original file line number Diff line number Diff line change
Expand Up @@ -154,15 +154,16 @@ def stem(x):
return x


class LayerNorm(nn.LayerNorm):
"""Subclass torch's LayerNorm to handle fp16."""
class LayerNorm(nn.Module):
def __init__(self, *args, **kwargs):
super(LayerNorm, self).__init__()
self.inner_layernorm = nn.LayerNorm(*args, **kwargs)

def forward(self, x: torch.Tensor):
orig_type = x.dtype
ret = super().forward(x.type(torch.float32))
ret = self.inner_layernorm(x.type(torch.float32))
return ret.type(orig_type)


class QuickGELU(nn.Module):
def forward(self, x: torch.Tensor):
return x * torch.sigmoid(1.702 * x)
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