prettyInstruction dex _ (InstanceFieldOp op val obj fid) =
  mkInsn ("i" <> accessOpStr op)
         [ iregStr8 val, iregStr8 obj, fieldStr dex fid ]
  <> fieldComm fid
prettyInstruction dex _ (InstanceFieldOp op val obj fid) =
  mkInsn ("i" <> accessOpStr op)
         [ iregStr8 val, iregStr8 obj, fieldStr dex fid ]
  <> fieldComm fid
prettyInstruction dex _ (InstanceFieldOp op val obj fid) =
  mkInsn ("i" <> accessOpStr op)
         [ iregStr8 val, iregStr8 obj, fieldStr dex fid ]
  <> fieldComm fid