On Mon, Jun 18, 2007 at 07:25:06PM +0200, Uros Bizjak wrote: > H. J. Lu wrote: > > >>>I was trying to load a full 128 bit constant into __float128 variable, > >>>but > >>>with "L" suffix, I was able to load only XFmode constant. Is there a > >>>special > >>>suffix for __float128 available in gcc? > >>> > >>No; since the x86-64 ABI is what defines the __float128 name, you could > >>ask the associated mailing list about a standard suffix to associate with > >>it. > >> > >Lack of standard for __float128 is always a problem. Suffix for > >__float128 constant is one, scanf/printf specifier for __float128 > >is another. We also don't have a name for string to __float128 > >function. > > > > While the __float128 scanf/printf specifier is part of library (and this > way, a custom library can provide these functions), the suffix for > constant should be covered by the compiler. Otherwise there is no > (clear) way to load the 128bit register with a 128bit constant value. > > BTW: IA64 has the same issues with two FP types (long double XFmode and > "longer double" TFmode). How is this solved for IA64?
The same as x86-64 :-(. That is there is __float128 in ia64 psABI. But it isn't fully implemented in gcc and glibc. H.J.
