diff --git a/optimization/src/pass/single_operator.cc b/optimization/src/pass/single_operator.cc
index 0ce64b38..8f26c797 100644
--- a/optimization/src/pass/single_operator.cc
+++ b/optimization/src/pass/single_operator.cc
@@ -18,11 +18,23 @@ Vec<Unigraph> optimization::pass::mutate( // fmt: new line
     SingleOperator const &                //
 ) {
     Vec<Unigraph> ans;
-
-    switch (g.operators.front().op_type) {
-    case OpType::Conv:
-        /* code */
-        break;
+    auto const &op = g.operators.front();
+    switch (op.op_type) {
+    case OpType::Conv: {
+        auto const &w_shape = op.inputs.at(1)->shape;
+        auto const &dilations = op.inputs.at(2)->data.cpu_data;
+        auto const &pads = op.inputs.at(3)->data.cpu_data;
+        auto const &strides = op.inputs.at(4)->data.cpu_data;
+        if (w_shape.rbegin()[0] == 1    // fmt: new line
+            && w_shape.rbegin()[1] == 1 //
+            && std::all_of(strides.begin(), strides.end(),
+                           [](auto x) { return x == 1; })) {
+            // 1x1 conv
+        } else if (std::any_of(dilations.begin(), dilations.end(),
+                               [](auto x) { return x != 1; })) {
+            // dilated conv
+        }
+    } break;
 
     default:
         break;