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

[Joseph Myers]

On Fri, 18 Nov 2016, Chris Metcalf wrote:

> We clearly should also tell libgcc not to bother preserving nan
> payloads given that the hardware doesn't do it in any case; I'll pass
> that along to the compiler team, but I'll also commit my original
> patch since it seems to match the hardware behavior.

FWIW, I wouldn't expect any significant performance difference between 
copying a payload and setting a payload to the canonical one (which is 
what you get if !_FP_KEEPNANFRACP).

-- 
Joseph S. Myers
joseph@codesourcery.com