* cppexp.c (interpret_number): Optimize for single-digit

	and less-than-half-precision cases.
	(num_trim, num_positive, num_div_op): Cast constants.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@53943 138bc75d-0d04-0410-961f-82ee72b054a4