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2026-04-02 11:42:53 +08:00 · 2025-04-30 04:29:39 +00:00
parent f1ecc11bd1
commit dc4e2a6ecd
16 changed files with 152414 additions and 43 deletions
--- a/modeling_mimo.py
+++ b/modeling_mimo.py
@ -0,0 +1,75 @@
+from typing import Optional, Tuple
+
+import torch
+from torch import nn
+from transformers.cache_utils import Cache
+from transformers.models.qwen2.modeling_qwen2 import (Qwen2Attention,
+                                                      Qwen2ForCausalLM,
+                                                      Qwen2MLP, Qwen2Model,
+                                                      Qwen2RMSNorm)
+
+from .configuration_mimo import MiMoConfig
+
+
+class MiMoMTPLayers(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.input_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.post_attention_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.token_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.hidden_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.input_proj = nn.Linear(config.hidden_size * 2, config.hidden_size, bias=False)
+        self.final_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.self_attn = Qwen2Attention(config, layer_idx=0)
+        self.mlp = Qwen2MLP(config)
+
+    def forward(self, input_embeds,
+                    hidden_states,
+                    attention_mask,
+                    position_ids,
+                    past_key_values: Optional[Cache]=None,
+                    output_attentions: Optional[bool]=False,
+                    use_cache: Optional[bool]=False,
+                    position_embedding: Optional[Tuple[torch.Tensor, torch.Tensor]] = None,
+                    cache_position=None,
+                    **kwargs):
+        input_embeds = self.token_layernorm(input_embeds)
+        previous_hidden_states = self.hidden_layernorm(hidden_states)
+        hidden_states = self.input_proj(torch.cat([previous_hidden_states, input_embeds], dim=-1))
+        residual = hidden_states
+        hidden_states = self.input_layernorm(hidden_states)
+        hidden_states, _ = self.self_attn(hidden_states,
+                                       attention_mask=attention_mask,
+                                       position_ids=position_ids,
+                                       past_key_values=past_key_values,
+                                       output_attentions=output_attentions,
+                                       use_cache=use_cache,
+                                       cache_position=cache_position,
+                                       position_embedding=position_embedding,
+                                       **kwargs)
+        hidden_states = residual + hidden_states
+        residual = hidden_states
+        hidden_states = self.post_attention_layernorm(hidden_states)
+        hidden_states = self.mlp(hidden_states)
+        hidden_states = residual + hidden_states
+        hidden_states = self.final_layernorm(hidden_states)
+        return hidden_states
+
+
+class MiMoModel(Qwen2Model):
+    config_class = MiMoConfig
+
+    def __init__(self, config: MiMoConfig):
+        super().__init__(config)
+        self.mtp_layers = nn.ModuleList([MiMoMTPLayers(config) for _ in range(config.num_nextn_predict_layers)])
+
+
+class MiMoForCausalLM(Qwen2ForCausalLM):
+    config_class = MiMoConfig
+    def __init__(self, config: MiMoConfig):
+        super(Qwen2ForCausalLM, self).__init__(config)
+        self.model = MiMoModel(config)
+        self.vocab_size = config.vocab_size
+        self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
+
+        self.post_init()