[Bug libgcc/78576] [PPC] wrong long double to long int conversion

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78576

--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
What are the actual high and low doubles in the return from powl?  The 
simplest reason for the reported result here would be that powl returns a 
result very slightly less than 27 (which is fine; there is no expectation 
of powl, or any operations for IBM long double, being correctly rounded).