-# define INS(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,pos,pos+size-1,MIPS_INS)
-# define DINS(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,pos,pos+size-1,MIPS_DINS)
+# define INS(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,pos+size-1,pos,MIPS_INS)
+# define DINS(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,pos+size-1,pos,MIPS_DINS)
+# define EXT(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,size-1,pos,MIPS_EXT)
+# define DEXT(rt,rs,pos,size) hrrrit(MIPS_SPECIAL3,rs,rt,size-1,pos,MIPS_DEXT)