* dfp.c (decimal_real_arithmetic): Change second argument type

	from int to enum tree_code. Do not always return true, but now
	return result of any call to decimal_do helper functions.
	* dfp.h (decimal_real_arithmetic): Update prototype.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@110626 138bc75d-0d04-0410-961f-82ee72b054a4