neil@daikokuya.co.uk said:
> volatile long double z = LDBL_EPSILON; 

Yes, the LDBL constants don't reflect reality that well on NetBSD.

> shouldn't it be the same as DBL_EPSILON on x86 NetBSD?

Probably yes... but also LDBL_MAX is affected, and LDBL_MANT_DIG.
This effectively constitutes an new FP type, with the mantissa
of "double" and the exponent of the x87 long double.
Unfortunately, the "gdtoa" library used by printf etc needs
some work to deal with this.

> > If yes, I don't see the point of keeping <long double> 
> > different from <double>?
> Well, you do get greater exponent range.  But don't ask me,
> it wasn't my decision.

Technically, the "long double" type is not worth much on i386,
at least with newer processors which speed up "double" arithmetics
by SSE2+.
There is a need however to keep the "long double" type as-is:
the ELF ABI spec.

best regards
Matthias




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