128 bit long double on AMD 64

[Tim Prince]

Nelson H. F. Beebe wrote:
> Usman Roshan <usman@oak.njit.edu> asks on Sat, 14 Oct 2006 09:23:53
> -0400 (EDT) about 128-bit floating-point arithmetic on AMD64
> processors.
> 

> On those systems, we have C/C++/Fortran compilers from GNU, Intel,
> PathScale, Portland Group, and Sun, plus tcc and lcc.  The latter two
> generate only IA-32 code.
> 
> None of these compilers provides 128-bit floating-point arithmetic on
> this platform.
> 

Several of those Fortran compilers support 128-bit floating point in 
software.