fenv.h fixes for softfloat

[Olivier Houchard]

Hi David,

On Wed, Jan 11, 2012 at 12:26:34AM -0500, David Schultz wrote:
> Debugging it without hardware could be tedious, and I don't
> actually have the time to dedicate to ARM development.  But it's
> encouraging that all the symbols resolve and nothing bad seems to
> happen.  Perhaps I can commit the softfloat bindings and one of
> the ARM developers can track down the (hopefully simple) bugs in
> softfloat or the bindings that prevent fenv.h from working.  It's
> bound to be better than the no-ops we have now, in any case.

I'm fine with this, if it doesn't make things worse I'd rather not see this
code lost.

Regards,

Olivier