[PATCH 01/28] powerpc: Use generic fabs{f} implementations

[Adhemerval Zanella]

On 02/04/2019 03:04, Joseph Myers wrote:
> On Fri, 29 Mar 2019, Adhemerval Zanella wrote:
> 
>> Since be2e25bbd78f9fdf the generic ieee754 implementation uses
>> compiler builtin which generates fabs{f} for all supported targets.
> 
> One reason for the existing version might be a microoptimization for code 
> size to make the float and double versions aliases, as permitted by the 
> ABIs and instruction set in this case.  (This is not an objection to this 
> patch.)
> 

Indeed powerpc does such microoptimizations for some implementations, but
if the idea is indeed to push such optimizations couldn't add on generic
implementation though a flag defined in arch-specific headers?