feat: add T5 with llama.cpp naming convention support (#654)

Author: stduhpf

model.cpp

@@ -181,6 +181,64 @@ std::unordered_map<std::string, std::string> pmid_v2_name_map = {
 std::string convert_open_clip_to_hf_clip(const std::string& name) {
     std::string new_name = name;
     std::string prefix;
+    if (contains(new_name, ".enc.")) {
+        // llama.cpp naming convention for T5
+        size_t pos = new_name.find(".enc.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 5, ".encoder.");
+        }
+        pos = new_name.find("blk.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 4, "block.");
+        }
+        pos = new_name.find("output_norm.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 12, "final_layer_norm.");
+        }
+        pos = new_name.find("attn_k.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 7, "layer.0.SelfAttention.k.");
+        }
+        pos = new_name.find("attn_v.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 7, "layer.0.SelfAttention.v.");
+        }
+        pos = new_name.find("attn_o.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 7, "layer.0.SelfAttention.o.");
+        }
+        pos = new_name.find("attn_q.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 7, "layer.0.SelfAttention.q.");
+        }
+        pos = new_name.find("attn_norm.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 10, "layer.0.layer_norm.");
+        }
+        pos = new_name.find("ffn_norm.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 9, "layer.1.layer_norm.");
+        }
+        pos = new_name.find("ffn_up.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 7, "layer.1.DenseReluDense.wi_1.");
+        }
+        pos = new_name.find("ffn_down.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 9, "layer.1.DenseReluDense.wo.");
+        }
+        pos = new_name.find("ffn_gate.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 9, "layer.1.DenseReluDense.wi_0.");
+        }
+        pos = new_name.find("attn_rel_b.");
+        if (pos != std::string::npos) {
+            new_name.replace(pos, 11, "layer.0.SelfAttention.relative_attention_bias.");
+        }
+    } else if (name == "text_encoders.t5xxl.transformer.token_embd.weight") {
+        new_name = "text_encoders.t5xxl.transformer.shared.weight";
+    }
+
     if (starts_with(new_name, "conditioner.embedders.0.open_clip.")) {
         prefix   = "cond_stage_model.";
         new_name = new_name.substr(strlen("conditioner.embedders.0.open_clip."));