At Thu, 11 Mar 2004 11:19:15 +0100, Vincent Lefevre wrote: > The WG14 N752 C9X revision proposal contained functions for > controlling the dynamic precision modes: > > The fegetprec and fesetprec functions provide control of > dynamic precision modes. > > Each macro > > FE_FLTPREC > FE_DBLPREC > FE_LDBLPREC > > is defined if and only if the implementation supports the > dynamic precision by means of the functions in 7.6.z. The > defined macros expand to integral constant expressions whose > values are distinct. > > You can see http://anubis.dkuug.dk/jtc1/sc22/wg14/www/docs/n752.htm > for more information. Unfortunately, this was dropped. But some > vendors implement them anyway. I'd like them to be implemented in > glibc too. If these functions and macros became a de facto standard, > this would be very useful when one wants double-precision rounding > on x86 processors. The problem with fpu_control.h features is that > they are specific to glibc.
Could you provide me more information? - Which merit should we use them? - n752.htm has only above explanation. Where can I get more info? - Do x86 processors have this kind of functions? - Why was this dropped? Regards, -- gotom -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
