DIF_OP_XOR
dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_XOR);
dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_XOR);
instr = DIF_INSTR_FMT(DIF_OP_XOR, dnp->dn_left->dn_reg,
case DIF_OP_XOR:
case DIF_OP_XOR:
case DIF_OP_XOR: