Add xvm_norm optimized function
Add xvm_norm optimized function

yanqingmen/Wapiti,Neseb/wapiti,Neseb/wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,Jekub/Wapiti,yanqingmen/Wapiti,Jekub/Wapiti