DCDATE_ADD_FF
DCDATE_SUB_TT
DCDATE_MUL_IF
DCDATE_MUL_RF
DCDATE_MUL_DF
DCDATE_MUL_FI
DCDATE_MUL_FR
DCDATE_MUL_FD
DCDATE_DIV_FR
DCDATE_DIV_FD
DCDATE_MOD_FF