pass auto mixed precision flag to ge init options

mindspore/ccsrc/utils/context/ms_context.cc

@@ -358,7 +358,9 @@ void MsContext::GetGeOptions(std::map<std::string, std::string>* ge_options) con
     MS_LOG(ERROR) << "Set proto lib path failed!";
   }
 
-  // Disbale the global variable acc, only enable it whlie adding training graph in pipeline
+  // Enable auto mixed precision according to the context options
+  (*ge_options)["ge.exec.auto_mix_precision"] = std::to_string(auto_mixed_precision_flag_);
+  // Disable the global variable acc, only enable it whlie adding training graph in pipeline
   (*ge_options)["ge.exec.variable_acc"] = "0";
 #endif
 }