[Bug libquadmath/63488] large errors in y0q

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63488

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Note that libquadmath has not been updated from glibc since November 2012.  
So, while in the Bessel function case large errors are already known for 
all floating-point types in glibc, in general libquadmath bugs are quite 
likely to have been fixed in glibc since the last update (and testing the 
glibc code directly on a platform with binary128 long double may be better 
- AArch64, Alpha, MIPS64, S/390, SPARC are all such platforms, and the GCC 
Compile Farm has some of them).

(It is of course possible there are some bugs specific to libquadmath, 
arising from the adaptation of the glibc code.)

(Eventually I think we should provide _Float128 functions directly in 
glibc's libm on x86/x86_64, with the TS 18661-3 names, in which case 
libquadmath could become a thin wrapper round the libm versions, on 
platforms using current glibc or any other library providing the TS 
18661-3 functions.)