Suffix for __float128 FP constants

[Uros Bizjak]

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?

Uros.