fixed pad bug

x2paddle/op_mapper/pytorch2paddle/aten.py

@@ -1221,18 +1221,16 @@ def aten_constant_pad_nd(mapper, graph, node):
     layer_attrs["value"] = mapper.attrs[inputs_name[2]]
 
     if padding_attr is not None:
+        padding_attr.reverse()
         layer_inputs["x"] = inputs_name[0]
         kernel_name = "paddle.nn.functional.pad"
         if len(padding_attr) == 2:
             layer_attrs["pad"] = [0, 0, 0, 0, 0, 0] + padding_attr
         elif len(padding_attr) == 4:
-            layer_inputs["x"] = inputs_name[0]
             layer_attrs["pad"] = [0, 0, 0, 0] + padding_attr
         elif len(padding_attr) == 6:
-            layer_inputs["x"] = inputs_name[0]
             layer_attrs["pad"] = [0, 0] + padding_attr
         else:
-            layer_inputs["x"] = inputs_name[0]
             layer_attrs["pad"] = padding_attr
         graph.add_layer(
             kernel_name,