[PATCH] math: Remove fenvinline.h

[Tulio Magno Quites Machado Filho]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:

> Similar to string2.h (18b10de7ce) and string3.h (09a596cc2c) this
> patch removes the fenvinline.h on all architectures.  Currently
> only powerpc implements some optimization.
>
> As for the strings optimization, 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).  The fact
> that no other architecture bother to implement such optimization
> is also an indication that these should no be on libc.
>
> The math/test-fenv already covers all math/test-fenvinline tests,
> so it is safe to remove it.
>
> Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.

As has been mentioned in the previous thread [1]: I welcome this patch after the
proposed compiler features are implemented, but I don't think glibc
should remove fenvinline.h before that.

[1] https://www.sourceware.org/ml/libc-alpha/2020-03/msg00073.html

-- 
Tulio Magno