TWOREG
{"ADDC",0x4200, TWOREG, {REG, REG, 0, 0}},
{"ADDXY",0xE000,TWOREG, {REG, REG, 0, 0}},
{"CMPXY",0xE400,TWOREG, {REG, REG, 0, 0}},
{"CPW", 0xE600, TWOREG, {REG, REG, 0, 0}},
{"CVXYL",0xE800,TWOREG, {REG, REG, 0, 0}},
{"DIVS",0x5800, TWOREG, {REG, REG, 0, 0}},
{"DIVU",0x5A00, TWOREG, {REG, REG, 0, 0}},
{"DRAV",0xF600, TWOREG, {REG, REG, 0, 0}},
{"LMO", 0x6A00, TWOREG, {REG, REG, 0, 0}},
{"MODS",0x6C00, TWOREG, {REG, REG, 0, 0}},
{"MODU",0x6E00, TWOREG, {REG, REG, 0, 0}},
{"MOVX",0xEC00, TWOREG, {REG, REG, 0, 0}},
{"MOVY",0xEE00, TWOREG, {REG, REG, 0, 0}},
{"MPYS",0x5C00, TWOREG, {REG, REG, 0, 0}},
{"MPYU",0x5E00, TWOREG, {REG, REG, 0, 0}},
{"SUBB",0x4600, TWOREG, {REG, REG, 0, 0}},
{"SUBXY",0xE200,TWOREG, {REG, REG, 0, 0}},
class = TWOREG;
if( (class == TWOREG || class == KREG)
class = TWOREG;
case TWOREG: /* reg, reg */