Re: convert mpf t to double with rounding-modes defined by ieee754

[usenett@gmx.de]

> > I want to write a function of converting mpf_t-variables to doubles by a
> > given rounding mode (to-nearest, truncation, plus infinity, minus
> infinity)
> > defined by the IEEE754 standard.
> 
> See: http://www.mpfr.org/
> Conversion from mpf_t to mpfr_t is very straightforward.

Thanks for the link, but thats not really what I'm looking for. I'd like to
know 'how' to convert a binary number to a correctly rouned double float to
implement this directly for the GMP-library without using the inefficient
indirection with MPFR.

Isn't there any good tutorial how to do such things?

Greets, Heinz

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