I've looked at several POSIX documents (limits.h, math.h, float.h). It seems that POSIX knows only float, double, and long double. According to Wikipedia, long double may be a 128 bit float - but unfortunately, that depends on the implementation. On x86, it is commonly the 80 bit float format of the 80x87. HP-UX and Solaris/SPARC actually use the name long double for 128 bit floats. And compilers may choose to treat long double as an alias for double, like MS VC++ does.

It looks like quadmath.h is no POSIX standard header. So strictly speaking, the FLT128_XXX definitons don't belong into the POSIX module.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re: POSIX and -Dusequadmath by afoken
in thread POSIX and -Dusequadmath by syphilis

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