[PATCH] Add nextup and nextdown math functions

[Florian Weimer]

On 05/20/2016 08:57 AM, Rajalakshmi Srinivasaraghavan wrote:
> +#ifndef FLOAT
> +# define FLOAT double
> +# define NEXTAFTER nextafter
> +# ifdef USE_AS_NEXTDOWN
> +#  define NEXTUP nextdown
> +# else
> +#  define NEXTUP nextup
> +# endif
> +#endif
> +
> +#define INTERNAL(X) INTERNAL1(X)
> +#define INTERNAL1(X) __##X
> +
> +FLOAT
> +INTERNAL(NEXTUP) (FLOAT x)
> +{
> +#ifdef USE_AS_NEXTDOWN

Would it make sense to have a file without defaults, and use #if 
USE_AS_NEXTDOWN (instead of #ifdef USE_AS_NEXTDOWN)?

In the past, I think we had bugs because of typos or missing overrides 
in such constructs, and if the template doesn't have defaults, such bugs 
are less likely to happen.

Thanks,
Florian