[patch,libfortran] PR31964 ishftc fails with certain thrid argument

[Jerry DeLisle]

Toon Moene wrote:
> Jerry DeLisle wrote:
> 
>> Fortran defines bit shifting up to and including bit_size of a value.
>>
>> It turns out that shifting is undefined for >= bit_size bits.
> 
> Ugh, I'm sorry this wasn't know (I know it for years, because of 
> bringing g77 up to date with the various standards).
> 
> Fortran allows shifts up to the width of the item.
> 
> C allows shifts up to the width minus one of the time.
> 
> Hope this helps,
> 
Hi Toon,

Already sorted this out and a patch is submitted.  If you could review and OK 
the patch, that would be helpful.

Jerry