As an aside, the GNU Fortran compiler (gfortran) also provides a quad precision floating point type, similar to this one. If the target supports native quad pre

As an aside, the GNU Fortran compiler (gfortran) also provides a quad precision floating point type, similar to this one. If the target supports native quad precision it uses that, otherwise it falls back to software emulation. Math functions are provided via libquadmath. Newer glibc also provides quad precision functions with slightly different names, IIRC using a f128 suffix rather than "q" like libquadmath.