patch with larger errors for "float"

[paul zimmermann]

       Dear Carlos,

> >> Just to confirm, does it pass make check without regression?
> > 
> > well, not really. I get *before* and after my patch:
> > 
> > Summary of test results:
> >     141 FAIL
> 
> This is very bad. What are these failures?

I get for example:

FAIL: debug/tst-backtrace2
FAIL: debug/tst-backtrace3
FAIL: debug/tst-backtrace4
FAIL: debug/tst-backtrace5
FAIL: debug/tst-backtrace6
FAIL: dlfcn/bug-atexit3
...
FAIL: stdlib/tst-thread-quick_exit

Is there a file where all failures are written?

> Could you please also review Joseph's comment to add the ULPs
> to libm-test-ulps for all 10 functions?
>
> If you have actually found 10 functions with specific inputs
> that have higher error bounds we should expect to see those
> larger error bounds reflected in the libm-test-ulps file.
> 
> As it stands it looks like either only 6 functions have larger
> error bounds, or as Joseph says there is a difference between
> how mpcheck and glibc compute ULPs.

as I said, I didn't use the testrun.sh wrapper, thus I was using
glibc 2.29 instead of the development version, which should explain
why some errors were larger. I'll use the development version in
further runs.

Best regards,
Paul