Convert mpfr_t (or any other type of arbitrary precision library) to __float128

Question

I guess I have two questions.

1) I was wondering if anyone knows a way to convert mpfr_t types to __float128 types in GCC. I looked through and found the stream on mpfr bugfixes website, where someone discusses their attempt to write a converter from __float128 to mpfr_t, but it looks like he left last year.

2) If no one knows how to convert mpfr_t to __float128, does anyone know of another arbitrary C / C ++ library that can?

thank

Answer 1

, gfortran implementation intrinsics ( C). , .