EXGF
{"EXGF",0xD500, EXGF, {REG, OPTSPEC,0, 0}},
{"SEXT",0x0500, EXGF, {REG, OPTSPEC,0, 0}},
{"ZEXT",0x0520, EXGF, {REG, OPTSPEC,0, 0}},
case EXGF: