builtins.c (expand_builtin_signbit): Extend to handle floating point modes wider than the largest integer type...


	* builtins.c (expand_builtin_signbit): Extend to handle floating
	point modes wider than the largest integer type, using the
	operand_subword_force function to obtain the signbit's word.

	* gcc.dg/builtins-32.c: Add new run-time tests for long double.

From-SVN: r96263