[PATCH][BZ #16823] Fix log1pl returning wrong infinity sign

[Marcus Shawcroft]

On 22 April 2014 09:24, Stefan Liebler <stli@linux.vnet.ibm.com> wrote:
> Hi,
>
> log1pl (-1) now returns with -inf instead of +inf in FE_DOWNWARD rounding
> mode. The source code producing the -inf for the double/float variants is
> the same, but on S390 the compiler generates a division by constant +zero
> and ignores the (x-x).
> Thus i also changed it to the constant zero in the double/float functions.
> I´ve tested it on S390.
> Please test it on other platforms because there are also reports for the
> same failure on aarch64 (see bug comment 1)
> and sparc (https://www.sourceware.org/ml/libc-alpha/2014-04/msg00410.html).
>
> Give feedback in order to commit the patch.

This resolves the failure on aarch64....
Cheers
/Marcus