+class VS2I<bits<8> o, Format F, dag outs, dag ins, string asm,
+ list<dag> pattern, InstrItinClass itin = NoItinerary>
+ : I<o, F, outs, ins, !strconcat("v", asm), pattern, itin>, TB,
+ OpSize, Requires<[HasAVX]>;
+class S2I<bits<8> o, Format F, dag outs, dag ins, string asm,
+ list<dag> pattern, InstrItinClass itin = NoItinerary>
+ : I<o, F, outs, ins, asm, pattern, itin>, TB,
+ OpSize, Requires<[UseSSE2]>;
+class MMXSDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
+ list<dag> pattern, InstrItinClass itin = NoItinerary>
+ : Ii8<o, F, outs, ins, asm, pattern, itin>, XD, Requires<[HasSSE2]>;
+class MMXS2SIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
+ list<dag> pattern, InstrItinClass itin = NoItinerary>
+ : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE2]>;