SSE intrinsic的几个指令_mm_prefetch/_mm_movehl_ps/_mm_shuffle_ps
1、_mm_prefetchvoid_mm_prefetch(char*p,inti)Theargument"*p"givestheaddressofthebyte(andcorrespondingcacheline)tobeprefetched.Thevalue"i"givesaconstant(_MM_HINT_T0,_MM_HINT_T1,_MM_HINT_T2,or_MM_HINT_NT