66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
import torch
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from contextlib import contextmanager
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class disable_weight_init:
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class Linear(torch.nn.Linear):
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def reset_parameters(self):
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return None
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class Conv2d(torch.nn.Conv2d):
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def reset_parameters(self):
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return None
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class Conv3d(torch.nn.Conv3d):
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def reset_parameters(self):
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return None
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class GroupNorm(torch.nn.GroupNorm):
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def reset_parameters(self):
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return None
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class LayerNorm(torch.nn.LayerNorm):
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def reset_parameters(self):
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return None
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@classmethod
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def conv_nd(s, dims, *args, **kwargs):
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if dims == 2:
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return s.Conv2d(*args, **kwargs)
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elif dims == 3:
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return s.Conv3d(*args, **kwargs)
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else:
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raise ValueError(f"unsupported dimensions: {dims}")
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def cast_bias_weight(s, input):
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bias = None
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if s.bias is not None:
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bias = s.bias.to(device=input.device, dtype=input.dtype)
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weight = s.weight.to(device=input.device, dtype=input.dtype)
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return weight, bias
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class manual_cast(disable_weight_init):
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class Linear(disable_weight_init.Linear):
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def forward(self, input):
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weight, bias = cast_bias_weight(self, input)
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return torch.nn.functional.linear(input, weight, bias)
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class Conv2d(disable_weight_init.Conv2d):
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def forward(self, input):
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weight, bias = cast_bias_weight(self, input)
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return self._conv_forward(input, weight, bias)
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class Conv3d(disable_weight_init.Conv3d):
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def forward(self, input):
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weight, bias = cast_bias_weight(self, input)
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return self._conv_forward(input, weight, bias)
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class GroupNorm(disable_weight_init.GroupNorm):
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def forward(self, input):
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weight, bias = cast_bias_weight(self, input)
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return torch.nn.functional.group_norm(input, self.num_groups, weight, bias, self.eps)
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class LayerNorm(disable_weight_init.LayerNorm):
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def forward(self, input):
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weight, bias = cast_bias_weight(self, input)
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return torch.nn.functional.layer_norm(input, self.normalized_shape, weight, bias, self.eps)
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