[PATCH] tile: create new math-tests.h header

[Joseph Myers]

On Wed, 16 Nov 2016, Chris Metcalf wrote:

> The header makes tile use the new mechanisms for suppressing
> exception and rounding support (the ROUNDING_TESTS_xxx() and
> EXCEPTION_TESTS_xxx macros).  More importantly, it also now sets
> SNAN_TESTS_PRESERVE_PAYLOAD to 0, since the tile soft float does
> not preserve NaN payloads.

All the tile sfp-machine.h files in libgcc seem to define _FP_KEEPNANFRACP 
to 1, so not preserving NaN payloads seems odd here.

-- 
Joseph S. Myers
joseph@codesourcery.com