+def bitfield LEGACY_DECODEVAL legacy.decodeVal;
+def bitfield LEGACY_REPNE legacy.repne;
+def bitfield LEGACY_REP legacy.rep;
+def bitfield LEGACY_LOCK legacy.lock;
+def bitfield LEGACY_OP legacy.op;
+def bitfield LEGACY_ADDR legacy.addr;
+def bitfield LEGACY_SEG legacy.seg;