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Update gemma.py

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Daniel Han-Chen 2024-02-25 04:20:09 +11:00
commit 47d4a33f41
1 changed files with 4 additions and 2 deletions
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unsloth/models/gemma.py
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@ -73,11 +73,13 @@ class FastGemmaRotaryEmbedding(torch.nn.Module):
self.base ** (torch.arange(0, self.dim, 2, dtype=torch.int64, device=x.device).float() / self.dim)
)
inv_freq_expanded = self.inv_freq[None, :, None].float().expand(position_ids.shape[0], -1, 1)
position_ids = torch.arange(self.max_position_embeddings, device=x.device, dtype=torch.int64).float()
inv_freq_expanded = self.inv_freq[None, :, None].float().expand(1, -1, 1)
position_ids_expanded = position_ids[:, None, :].float()
freqs = (inv_freq_expanded @ position_ids_expanded).transpose(1, 2)
emb = torch.cat((freqs, freqs), dim=-1)
return emb.cos().to(dtype=x.dtype), emb.sin().to(dtype=x.dtype)
length = position_ids.shape[1]
return emb.cos().to(dtype=x.dtype)[:,:length], emb.sin().to(dtype=x.dtype)[:,:length]
pass