This subsection describes our format for bigfloat in terms of the int32. This format is identical to the internal format of mpfr on 32 bit CPU's.
Ref: OpenXM/src/mpfr/bfsize/bfsize.c
#define CMO_BIGFLOAT32 52
The bigfloat32 is an array of int32 numbers of the following format.
p=prec is the precision, s=sign is the sign(1 means positive, -1 (expressed by two's complement) is nevative),
E=exp is the exponent, and the data above expresses the number