[Model] Qwen3.5 dense and MoE support (no vision) (#19435)

* Unified delta net handling * Remove old methods. * Refactor and optimize * Adapt autoregressive version from @ymcki * Change to decay mask approach * Fix bad permute * Qwen 3.5 support * Apply suggestions from code review Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com> * Further fixes * Use inheritance, remove unneeded conts * Not like this! * Remove ggml.h explicit import * Remove transformers, fix the views * ACTUALLY fix views, make super calls explicit in conversion. * Fix conversion again * Remove extra ggml.h imports --------- Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
2026-02-09 00:24:08 +01:00
parent e06088da0f
commit 39bf692af1
14 changed files with 1532 additions and 399 deletions
@@ -0,0 +1,52 @@
+#include "models.h"
+
+llm_build_qwen3_5_moe::llm_build_qwen3_5_moe(const llama_model & model, const llm_graph_params & params) :
+    llm_build_qwen3_5(model, params, defer_graph_build_t{}) {
+    build_graph();
+}
+
+ggml_tensor * llm_build_qwen3_5_moe::build_layer_ffn(ggml_tensor * cur, const int il) {
+    // Check if this is an MoE layer
+    if (model.layers[il].ffn_gate_inp != nullptr) {
+        // MoE branch
+        ggml_tensor * moe_out =
+            build_moe_ffn(cur,
+                model.layers[il].ffn_gate_inp, model.layers[il].ffn_up_exps,
+                model.layers[il].ffn_gate_exps, model.layers[il].ffn_down_exps,
+                nullptr,
+                n_expert, n_expert_used, LLM_FFN_SILU,
+                true, false, 0.0, LLAMA_EXPERT_GATING_FUNC_TYPE_SOFTMAX, il);
+        cb(moe_out, "ffn_moe_out", il);
+
+        // Add shared experts if present
+        if (model.layers[il].ffn_up_shexp != nullptr) {
+            ggml_tensor * ffn_shexp =
+                build_ffn(cur,
+                    model.layers[il].ffn_up_shexp, NULL, NULL,
+                    model.layers[il].ffn_gate_shexp, NULL, NULL,
+                    model.layers[il].ffn_down_shexp, NULL, NULL,
+                    NULL,
+                    LLM_FFN_SILU, LLM_FFN_PAR, il);
+            cb(ffn_shexp, "ffn_shexp", il);
+
+            // Apply shared expert gating (sigmoid)
+            ggml_tensor * shared_gate = build_lora_mm(model.layers[il].ffn_gate_inp_shexp, cur);
+            cb(shared_gate, "shared_expert_gate", il);
+
+            shared_gate = ggml_sigmoid(ctx0, shared_gate);
+            cb(shared_gate, "shared_expert_gate_sigmoid", il);
+
+            ffn_shexp = ggml_mul(ctx0, ffn_shexp, shared_gate);
+            cb(ffn_shexp, "ffn_shexp_gated", il);
+
+            cur = ggml_add(ctx0, moe_out, ffn_shexp);
+            cb(cur, "ffn_out", il);
+        } else {
+            cur = moe_out;
+        }
+    } else {
+        // Dense FFN branch (fallback)
+        cur = llm_build_qwen3_5::build_layer_ffn(cur, il);
+    }
+    return cur;
+}