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This directory contains functions for GMP's integer function layer.

In this version of GMP, integers are represented like in the figure below. (Please note that the format might change between every version, and that depending on the internal format in any way is a bad idea.)

   most                         least
significant                  significant
   limb                         limb

                                 mpd
                                  /
                                 /
                                \/
         ____ ____ ____ ____ ____
        |____|____|____|____|____|

        <------- mpsize ------->

The most significant limb will be non-zero. The mpsize field's sign reflects the sign of the number. Its absolute value is the count of limbs in the number.