[PATCH v2 1/3] Cleanup __ieee754_sqrt(f/l)

[Wilco Dijkstra]

Joseph Myers wrote:

> It's not being defined, it's being 1 rather than 0 (#if, not #ifdef).  
> You should use _Float128, not __float128; bits/floatn.h handles defining 
> _Float128 as a typedef if necessary for older compilers.

OK I can get that to work, but I still get odd issues with sqrtf128 being
called from the testsuite, while libm.so only defines __sqrtf128, so it
gives undefined symbol errors on x64. So I wonder whether in external
headers we should never do this:

#define sqrtl sqrtf128

Unless there is an easy fix for these issues, I can't see any point in
including it in my current patches - improving float/double inlining in this
release gives much more benefit to all targets.

Wilco