[PATCH v2 1/3] math: Remove fenvinline.h

[Florian Weimer]

* Adhemerval Zanella:

> Similar to string2.h (18b10de7ce) and string3.h (09a596cc2c) this
> patch removes the fenvinline.h on all architectures.  Currently
> only powerpc implements some optimizations.  This kind of optimization
> is better implemented by the compiler (which handles the architecture
> ISA transparently).
>
> Also, for the specific optimized powerpc implementation the code is
> becoming convoluted and these micro-optimization are hardly wildly
> used, even more being a possible hotspot in realword cases
> (non-default rounding are used only on specific cases and exception
> handling are done most likely only on errors path).  Only x86
> implements similar optimization (on fenv.h) also indicates that
> these should no be on libc.

Wasn't the idea to make this change only after the GCC optimizations
have been implemented?