* config/alpha/alpha.c (alpha_atomic_assign_expand_fenv): New.
	(TARGET_ATOMIC_ASSIGN_EXPAND_FENV): New define.

testsuite/ChangeLog:

	* lib/target-supports.exp (check_effective_target_fenv_exceptions):
	Add IEEE options to compile flags.
	* gcc.dg/atomic/c11-atomic-exec-5.c: Ditto.  Add -mieee-with-inexact
	additional option and lower ITER_COUNT to 100 for alpha*-*-* targets.

From-SVN: r212568