Kenneth Zadeck <zad...@naturalbridge.com> writes:
> see wide-int.h around line 290
>
> the MAX_BITSIZE_MODE_ANY_INT is the largest mode on the machine. however 
> if the value coming in is an unsigned number of the type the represents 
> that mode, don't we loose a bit?

That was the +1 mentioned here:

   http://gcc.gnu.org/ml/gcc-patches/2013-11/msg03745.html

I.e. it should be "widest supported arithmetic input + 1".

Thanks,
Richard

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