dbl2ival         1101 numeric.c          a = dbl2ival(div);
dbl2ival         1819 numeric.c      	return rb_int_ceil(dbl2ival(ceil(number)), ndigits);
dbl2ival         1822 numeric.c      	return dbl2ival(ceil(number));
dbl2ival         2004 numeric.c      	return dbl2ival(round(number));
dbl2ival         3594 numeric.c      	    a = dbl2ival(div);