[02/12] Add femode_t functions: aarch64

[Joseph Myers]

On Tue, 6 Sep 2016, Szabolcs Nagy wrote:

> the later one outputs
> "first feenableexcept failed, cannot test"
> several times, maybe it should be UNSUPPORTED
> in that case like math/test-fexcept-traps.

The issue is the difference between a complete test being unsupported, and 
the individual subtests being unsupported.  test-fexcept-traps globally 
gates things on a single feenableexcept / EXCEPTION_ENABLE_SUPPORTED 
(FE_ALL_EXCEPT) test, whereas in the present patch it's each individual 
subtest (except the trivial ones) that detects that that particular 
subtest is unsupported.  (In practice I don't expect enabling traps to be 
supported for only a subset of exceptions.  It's e.g. libm-test.inc that 
can genuinely be a case of some subtests being supported and others not.)

-- 
Joseph S. Myers
joseph@codesourcery.com