Suffix for __float128 FP constants

[H. J. Lu]

On Mon, Jun 18, 2007 at 11:10:43AM -0700, Steve Ellcey wrote:
> > BTW: IA64 has the same issues with two FP types (long double XFmode and 
> > "longer double" TFmode). How is this solved for IA64?
> > 
> > Uros.
> 
> This is different on IA64 HP-UX and IA64 Linux.  On HP-UX, 128 bits is
> the standard long double and 80 bits is __float80.  We use the 'W'
> suffix for a __float80 constant on HP-UX.  HP-UX also uses a lower case
> 'w' in math names for functions (e.g.  sqrtw) for __float80 functions.
> 
> Since __float128 == long double on HP-UX we can just use 'L' and 'l' for
> those.
> 

We need a standard for __float128. Otherwise, a program using
__float128 may generate different results with different
compilers on different platforms.

BTW, I had a __float128 patch for glibc. Because there is no
__float128 standard, it wasn't accepted.


H.J.