Re: store_floating() rewrite (was Re: bug in arm_push_arguments())

[Andrew Cagney <ac131313 at cygnus dot com>]

Jim Kingdon wrote:
> 
> > There is no explicit policy in GDB on which operations are allowed to
> > lose precision, and which operations are not supposed to lose
> > precision.  I think that if we're going to address the issues raised
> > here, we must determine such a policy, and document it.
> 
> Well, I think the intended policy (which probably isn't 100% true of
> the current implementation) is that precision should be kept when it
> is possible/feasible to do so, and that otherwise GDB can lose
> precision.

That is as close as a ``policy'' gets.  The only foot note being
everyone wishes GDB could to arithmetic using an emulation of the
targets FPU.

> That's bad in the sense that the user doesn't get a clear expectation,
> but what's the alternative?  Give an error if we would lose precision
> (is there even a general enough way to detect this?  I don't see the
> machinery for it now)?
> 
> P.S. Kevin Buettner's store_floating rewrite looked about right to me
> too.

Andrew