Desire to allocate bit in DT_PARM bitmask for DEC FORMAT compatibility purposes

[Jeff Law]

On 03/21/2018 11:25 AM, Jakub Jelinek wrote:
> On Tue, Mar 20, 2018 at 12:41:25PM -0600, Jeff Law wrote:
>> This is documented in the old manuals from DEC and I've found
>> essentially the same documentation in Oracle/Sun's current documentation
>> as well as old MIPS documentation.   I have a high degree of confidence
>> it exists in IBM's Fortran compilers as well.  In contrast Intel & PCG's
>> Fortran compilers do not seem to support this extension.
> 
> My testing disagrees with the last one, at least ifort 17.0.4 handles
> the default widths like this patch does with -fdec.
I was going from what I could find in the online documentation.  I could
have missed it, or it could be undocumented behavior.  Similarly for
Portland Group's compiler -- I'm going on documented behavior that I
could find online.

I don't think it materially changes things though.
jeff