bug in ldexp with directed rounding

[Paul Zimmermann]

and there is a similar issue with ldexpf.

Paul

> Date: Thu, 08 Feb 2024 11:23:00 +0100
> From: Paul Zimmermann <Paul.Zimmermann@inria.fr>
> 
>        Hi,
> 
> this bug is still present in 4.4.0:
> 
> https://sourceware.org/pipermail/newlib/2023/020225.html
> 
> Paul
>